JP2015224498A - Crushing method of sewage pipe and removal method of sewage pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crushing method of sewage pipe and a removal method of the sewage pipe, capable of surely breaking an existing sewage pipe in a present position.SOLUTION: A crushing method comprises a process of arranging a flexible pipe having an explosive device in a sewage pipe, a process of filling a pressure medium in the sewage pipe and a process of breaking the sewage pipe by detonating the explosive device, and comprises a process of inserting a traction member between the sewage pipe and two manholes adjacently arranged to the sewage pipe, a process of pulling a flexible pipe via the traction member in the other manhole via the inside of the sewage pipe from one manhole by installing the flexible pipe in the traction member, a process of filling the pressure medium in the sewage pipe, a process of pulling the explosive device in the flexible pipe and a process of breaking the sewage pipe by detonating the explosive device.

Description

  The present invention relates to a method of crushing an existing sewer pipe and burying it in the current position (in the soil) as it is, and a method of removing the existing sewer pipe crushed by this method.

In Japan, underground pipes under public roads generally include waterworks, sewers, and gas pipes. Depending on the region, wiring for supplying power (wiring passes through an insulated buried pipe), steam pipes, hot water pipes, etc. are also buried.
The sewer is a collection of facilities and equipment mainly for collecting rainwater and sewage in urban areas with pipes (consisting of sewer pipes and manholes), and then discharging them into public water bodies. Water treatment.

Rainwater includes precipitation in meteorology and snowmelt that melts snow once it has accumulated due to a rise in temperature, etc., except for those that are on the surface such as road surfaces, except for river water and groundwater.
Sewage includes human waste from flush toilets, domestic wastewater from cooking and washing at home, and industrial wastewater from shops, hotels, town factories to large factories (excluding cultivation).

The number of pipes that pass through sewer pipes at the same time varies greatly depending on the local government.
Rainwater (rain gutter), domestic wastewater (kitchen, wash basin, bath) and municipality that passes human waste separately, municipality that passes two wastewater and human waste separately (rainwater drains, river discharge), life There is a local government (rainwater is a side ditch and river discharge) that passes urine as a single drainage, and a local government (rainwater is a side ditch and river discharge) that passes urine as a domestic wastewater is the mainstream.
In rural areas, there are local governments that use only human wastewater.
However, the number of local governments that discharge rainwater and domestic wastewater into rivers using only human waste is decreasing.

  Sewer pipes have a structure in which manholes are dug at appropriate intervals, and the sewer pipes are connected with an inclination so that sewage flows naturally between the manholes. Manholes are vertical holes (people) that are open to the ground so that workers can enter and exit from the ground for the purpose of management (inspection, repair, cleaning, exhaust, etc.) of underground sewers, underdrains, buried electricity, and communication cables. Hole) and is commonly referred to as the “桝”. However, when the slope is not enough or on slopes, manhole pumps are used in combination to produce a height difference.

The sewer pipe is very worn out because of the liquid mixture. In the old days there were also brickwork pipes, but pottery pipes and iron pipes were the mainstay after the war.
Pottery pipes and steel pipes were said to last for several decades, but in reality they are aging and are often replaced with concrete pipes in the Showa era.
Recently, for small diameter pipes such as branch pipes, vinyl chloride pipes with excellent strength and durability are increasing.
Furthermore, hard polyethylene pipes and hard polypropylene pipes have come to be used.

Renewal of sewer pipes will be replaced as needed due to aging of sewer pipes and abnormalities in connection parts. However, there are many cases where there are more houses and pipes are replaced with thicker pipes due to lack of pipe capacity (too thin).
Water pipes and hot water pipes are always filled with water, and heavy copper wires are stored in the electric pipes. Therefore, water pipes and hot water pipes do not float even when liquefied due to an earthquake, but there are many manholes and sewage pipes with air (space) inside, and the liquefaction caused by an earthquake will float and suffer a lot of damage. Yes.

Therefore, how to implement replacement work is a problem in order to maintain the sewerage system.
The most common replacement method for sewer pipes is the excavation method.
In the open-cut method, after detouring or blocking traffic, the asphalt is cut with a diamond cutter and excavated with a backfor while retaining earth (preventing collapse), and the surroundings of existing sewer pipes, gas pipes, and water pipes are hand-carved. Excavate with. After that, sewage is bypassed, the existing sewer pipe is cut and removed, replaced with a new sewer pipe, the sewage bypass is released, backfilled, and finally re-paved.

For this reason, the open-cut method occupies the road for a long period of time and the construction cost is enormous. Moreover, since a person gets down to work in a groove, there is a danger that the groove collapses and is buried. Furthermore, problems such as the need for a space for cutting existing sewer pipes have been pointed out.
Therefore, underground replacement methods have been developed as a means to replace the excavation method.
In this replacement method, a pushing device such as a hydraulic jack is installed in the starting manhole, a traction device such as a hydraulic winder is installed in the reaching manhole, and an existing sewer pipe is crushed with a crusher, a rotary cutter, This is achieved by pushing a new sewer pipe from behind such as a crusher and a rotary cutter.

  However, the replacement method cannot be carried out unless the manhole is of a size that can carry in the pushing device, the traction device or the like. The manhole cannot be carried out unless the strength of the manhole is capable of receiving the reaction force of the pushing device or the traction device. When existing sewer pipes rotate together, the crushing efficiency is greatly reduced. The existing sewer pipe has been liquefied due to the earthquake, and it has been raised that it cannot be constructed if it is bent.

On the other hand, if there is room in the road or underground space, there is a method in which an existing sewer pipe is left without being removed and a new sewer pipe is installed by underground excavation. In this method, the existing sewer pipe is left without being removed, and a new sewer pipe is installed in the ground in parallel with the existing sewer pipe.
In this construction method, when the existing sewer pipe left without being removed later is taken out, it is difficult to cut. Because the mortar is filled in the existing sewer pipe when leaving, the cutting blade is damaged by the mortar, and if the mortar filling at the time of the leaving process is insufficient, the new sewer pipe will be damaged when liquefied by the next earthquake. there is a possibility.

Therefore, before destroying the existing sewer pipe by the non-open cutting method and replacing it with a new sewer pipe, the strength against the expansion of the existing sewer pipe by breaking or scissoring it from the inner surface of the existing sewer pipe with an air plasma jet A non-cutting method old pipe pretreatment method (for example, see Patent Document 1) has been proposed.
In addition, disk cutters are rotatably provided at a plurality of circumferential positions near the tip of the main body having through holes through which the propelling elongate body is inserted in the longitudinal direction, and cylinders are movable in the axial direction in the through holes of the main body. Provided with a cylinder-shaped cylinder rod, a drive fluid supply mechanism for driving the cylinder rod forward and backward with respect to the main body, and a locking body provided on the main body for detachably locking the main body to the elongate propulsion body, There has been proposed a non-opening type old pipe replacement device (see, for example, Patent Document 2) in which a locking body is provided on the cylinder rod in order to detachably lock the cylinder rod to the propelling long body.

JP-A-63-312593 Japanese Patent Publication No.7-76512

However, in the non-open-cutting method old pipe pretreatment method of Patent Document 1, there is a possibility that the apparatus collapses during an existing sewer pipe cutting operation and the apparatus is buried. Moreover, the length which can send the hose which supplies energy required for air plasma jet generation | occurrence | production, a cooling hose, and a power line to a cutting planned piping is required.
In addition, the non-cutting method old pipe pretreatment method disclosed in Patent Document 1 is simply provided with a scratch or cut along the cutting line while sequentially moving the air plasma jet ejection portion within the pipe. It can only weaken the strength against the spread of sewer pipes.
Moreover, since the non-cutting method old pipe pretreatment method of Patent Document 1 is only scratched or cut along the cutting line by an air plasma jet, the existing sewer pipe is limited to a material through which electricity flows. .

Therefore, the non-cutting method old pipe pretreatment method of Patent Document 1 cannot solve the following problems (1) to (4) of the non-cutting method.
(1) Implementation is not possible unless the manhole is of a size that can carry in a pushing device, a traction device, or the like. (2) The manhole cannot be carried out unless the strength of the manhole is capable of receiving the reaction force of the pushing device or the traction device. (3) When existing sewer pipes rotate together, the crushing efficiency is greatly reduced. (4) If the existing sewer pipe is bent due to liquefaction caused by an earthquake, it cannot be constructed.

On the other hand, in the non-open-cutting type old pipe replacement device of Patent Document 2, a new sewer pipe is laid from behind while destroying the existing sewer pipe, so that the stress that can break the existing sewer pipe, the existing sewer pipe The crusher needs energy to crush the tube.
Moreover, in the non-opening type old pipe replacement device of Patent Document 2, the existing sewer pipes rotate together so that the non-cutting type old pipe replacement device cannot bite the existing sewer pipe, If the pipe replacement device breaks down between manholes and manholes, there is a problem in that it is necessary to cut from the public road side and take out the non-cut-open old pipe replacement device together with the existing sewer pipe.

  The present invention was made in order to solve such a conventional problem, and the purpose thereof is a sewer pipe crushing method capable of reliably destroying an existing sewer pipe at the current position, and a sewer pipe crush. The purpose of the present invention is to provide a method for removing sewer pipes that can remove existing sewer pipes crushed by the construction method.

  The invention according to claim 1 is a step of arranging a flexible pipe provided with pyrotechnics in an existing sewer pipe, a step of filling a pressure medium in the existing sewer pipe, and detonating the pyrotechnics, And a step of destroying the existing sewer pipe.

  The invention according to claim 2 includes a step of inserting a traction member between two manholes disposed adjacent to an existing sewer pipe and the existing sewer pipe, and a flexible pipe is attached to the traction member. A step of drawing a flexible pipe from one of the manholes into the other manhole through the existing sewer pipe, a step of filling a pressure medium in the existing sewer pipe, and a pyrotechnic in the flexible pipe And a step of detonating the pyrotechnics and destroying the existing sewer pipe.

  According to a third aspect of the present invention, there is provided a step of inserting a traction member between two manholes disposed adjacent to an existing sewer pipe and the existing sewer pipe, and a pulling of a flexible pipe through which an auxiliary traction member is inserted. Attaching to the member, drawing the flexible pipe from one of the manholes through the existing sewer pipe to the other manhole through the pulling member, filling the existing sewer pipe with a pressure medium, and Attaching a pyrotechnic to the auxiliary pulling member, pulling the auxiliary pulling member to draw the pyrotechnic into the flexible pipe, and detonating the pyrotechnic and destroying the existing sewer pipe It is characterized by having.

The invention according to claim 4 is the sewer pipe crushing method according to any one of claims 1 to 3, wherein the flexible pipe is formed of a tubular body having an inner diameter through which pyrotechnics can pass. It is characterized by being.
The invention according to claim 5 is the sewer pipe crushing method according to any one of claims 1 to 4, wherein the pressure medium is a filling material that naturally solidifies after being injected into the existing sewer pipe, and the existing sewer system. It is a filling that solidifies when water is poured into the pipe after filling and mixed, or a filling that does not harden after filling into the existing sewer pipe.

The invention according to claim 6 is the sewer pipe crushing method according to claim 5, wherein the filler that naturally hardens after being poured into the existing sewer pipe is concrete, mortar, or plaster, and is filled into the existing sewer pipe. The filler that solidifies when water is injected and mixed later is concrete powder, gypsum powder, or a water-absorbing polymer, and the filler that does not solidify after pouring into the existing sewer pipe is water or muddy water. To do.
The invention according to claim 7 is the sewer pipe crushing method according to any one of claims 1 to 6, wherein the pyrotechnic product is an explosive wire attached so as to be scattered with an explosive wire or an explosive. It is the rope attached so that the non-explosive gas generating agent may be scattered.

  According to an eighth aspect of the present invention, the step of inserting a traction member between two manholes arranged adjacent to an existing sewer pipe and the existing sewer pipe, and the flexible pipe through which an auxiliary traction member is inserted are pulled. Attaching to the member, drawing the flexible pipe from the one manhole through the existing sewer pipe to the other manhole via the pulling member, and filling the existing sewer pipe with concrete, mortar, or plaster Attaching a pyrotechnic to the auxiliary pulling member, pulling the auxiliary pulling member to draw the pyrotechnic into the flexible pipe, detonating the pyrotechnic, and destroying the existing sewer pipe In the step of detonating the pyrotechnics and destroying the existing sewer pipe, the concrete, mortar or plaster removes countless pieces of the existing sewer pipe from surrounding soil. Cured in the form of encapsulated together, characterized in that to prevent diffusion of countless debris sewerage of the existing.

  The invention according to claim 9 includes a step of inserting a traction member between two manholes arranged adjacent to an existing sewer pipe and the existing sewer pipe, and a pulling of a flexible pipe through which an auxiliary traction member is inserted. Attaching the flexible pipe from one of the manholes through the existing sewer pipe to the other manhole through the pulling member, and supplying concrete powder, gypsum powder or water absorption into the existing sewer pipe; Filling a conductive polymer, injecting water, mixing, attaching a pyrotechnic to the auxiliary traction member, pulling the auxiliary traction member to draw the pyrotechnic into the flexible tube, and the fire In the process of detonating the work and destroying the existing sewer pipe, the concrete powder, the gypsum powder, or the mixture of water-absorbing polymer and water causes the countless fragments of the existing sewer pipe to surround the surrounding soil. Cured in the form of encapsulated together, characterized in that to prevent diffusion of countless debris sewerage of the existing.

  According to a tenth aspect of the present invention, there is provided a step of inserting a traction member between two manholes arranged adjacent to an existing sewer pipe and the existing sewer pipe, and a traction pipe through which an auxiliary traction member is inserted. Attaching to the member, drawing the flexible pipe from one manhole through the existing sewer pipe to the other manhole via the pulling member, filling the existing sewer pipe with water or mud water, Attaching a pyrotechnic to the auxiliary pulling member, pulling the auxiliary pulling member to draw the pyrotechnic into the flexible pipe; detonating the pyrotechnic and destroying the existing sewer pipe; In the step of detonating the pyrotechnics and destroying the existing sewer pipe, the water or muddy water causes an impact force from the pyrotechnic explosion to act from the inside of the existing sewer pipe. , The existing Be a carrier for efficiently crush the sewer pipe, characterized in that is scattered around in the soil countless debris sewer pipe crushed the existing.

  According to an eleventh aspect of the present invention, there is provided a step of inserting a traction member between two manholes arranged adjacent to an existing sewer pipe and the existing sewer pipe, and a traction pipe inserted through an auxiliary traction member. Attaching to the member, drawing the flexible pipe from the one manhole through the existing sewer pipe to the other manhole via the pulling member, and filling the existing sewer pipe with concrete, mortar, or plaster Attaching a pyrotechnic to the auxiliary pulling member, pulling the auxiliary pulling member to draw the pyrotechnic into the flexible pipe, detonating the pyrotechnic, and destroying the existing sewer pipe And a step of removing the existing sewer pipe that has been excavated and destroyed from the ground surface. In the step of detonating the pyrotechnics and destroying the existing sewer pipe, In the step of hardening the mortar or gypsum in the form of enclosing countless pieces of the sewer pipe together with surrounding soil, preventing the countless pieces of the existing sewer pipe from diffusing, and removing the existing sewer pipe The hardened material group hardened in the form of enclosing countless pieces of the existing sewer pipes with surrounding soil by the concrete, mortar, or plaster is removed.

  According to a twelfth aspect of the present invention, the step of inserting a traction member between two manholes arranged adjacent to an existing sewer pipe and the existing sewer pipe, and the flexible pipe through which an auxiliary traction member is inserted are pulled. Attaching the flexible pipe from one of the manholes through the existing sewer pipe to the other manhole through the pulling member, and supplying concrete powder, gypsum powder or water absorption into the existing sewer pipe; Filling a conductive polymer, injecting water, mixing, attaching a pyrotechnic to the auxiliary traction member, pulling the auxiliary traction member to draw the pyrotechnic into the flexible tube, and the fire In the process of detonating the work and destroying the existing sewer pipe, the concrete powder, gypsum powder or a mixture of water-absorbing polymer and water surrounds the countless pieces of the existing sewer pipe. In the process of hardening with the soil and preventing the diffusion of countless pieces of the existing sewer pipe, and removing the existing sewer pipe, the concrete powder, gypsum powder or water-absorbing polymer is water. By mixing, the hardened material group which hardened | cured in the form which included the countless piece of the said existing sewer pipe | tube with the surrounding soil is removed, It is characterized by the above-mentioned.

  According to a thirteenth aspect of the present invention, there is provided a step of inserting a traction member between two manholes arranged adjacent to an existing sewer pipe and the existing sewer pipe, and a pulling of a flexible pipe through which an auxiliary traction member is inserted. Attaching to the member, drawing the flexible pipe from one manhole through the existing sewer pipe to the other manhole via the pulling member, filling the existing sewer pipe with water or mud water, Attaching a pyrotechnic to the auxiliary pulling member, pulling the auxiliary pulling member to draw the pyrotechnic into the flexible pipe; detonating the pyrotechnic and destroying the existing sewer pipe; Removing the existing sewer pipe that has been excavated and destroyed from the ground surface, in the process of detonating the pyrotechnics and destroying the existing sewer pipe, Start of pyrotechnics Acting from the inside of the existing sewer pipe, it becomes a medium for efficiently crushing the existing sewer pipe, and countless pieces of the crushed existing sewer pipe are scattered in the surrounding soil, In the step of removing the existing sewer pipe, innumerable pieces of the existing sewer pipe scattered in the surrounding soil are removed.

According to the present invention, the existing sewer pipe is crushed and buried in the current position (in the soil) as it is (burial). Less susceptible to liquefaction caused by earthquakes.
According to the present invention, a pyrotechnic that can express a destructive force that is overwhelmingly superior to the strength of an existing sewer pipe is arranged in a flexible pipe arranged in an existing sewer pipe, and a pressure medium is filled in the existing sewer pipe Since the pyrotechnics are detonated, the destructive force of the pyrotechnics can propagate the pressure medium and reliably break the existing sewer pipe.
According to the present invention, the pressure medium used for crushing existing sewer pipes is filled with a solid that naturally solidifies after injection or water that is solidified when injected and mixed. Innumerable pieces of sewer pipes can be wrapped in the surrounding soil on the spot and turned into hardened groups, which can be easily removed by subsequent excavation work.

  According to the present invention, the pressure medium used for crushing existing sewer pipes is filled with a solid that naturally solidifies after injection or water that is solidified when injected and mixed. Countless pieces of sewer pipes can be encased in the surrounding soil on the spot and turned into a hardened material group, and even if the next earthquake comes and liquefaction occurs, It is possible to avoid shortages such as standing up from the ground like existing sewer pipes.

According to the present invention, the pressure medium used for crushing existing sewer pipes uses a filling that does not solidify after injection, so that the pressure medium can be used to generate countless pieces of crushed existing sewer pipes on the spot. It is scattered without being encased in the surrounding soil and absorbed by the surrounding soil.
According to the present invention, the pressure medium used for crushing existing sewer pipes uses a filling that does not solidify after injection, so that the pressure medium can be used to remove innumerable pieces of crushed existing sewer pipes on the spot. Since it is scattered without being encased in the surrounding soil and absorbed by the surrounding soil, it can be easily removed by a back-for etc.
According to the present invention, an existing sewer pipe is crushed small in the underground, so that the width of the groove can be narrowed compared to the conventional method in the open work for taking out the cured product group or crushed material.
According to the present invention, in the excavation work for taking out the crushed material, since the person does not enter the groove and cut the existing sewer pipe, the excavation work can be performed safely.

It is a flowchart which shows the operation | work procedure of 1st embodiment of this invention. It is a schematic sectional drawing which shows the sewer pipe pipe before implementation of 1st embodiment of this invention. It is a schematic sectional drawing which shows the existing sewer pipe and manhole in the 1st process of 1st embodiment of this invention. It is a schematic sectional drawing which shows the relationship between the sewer pipe and the attachment pipe | tube in the 2nd process of 1st embodiment of this invention. It is a schematic sectional drawing which shows the state which pulled in the messenger wire in the 3rd process of 1st embodiment of this invention. It is a schematic sectional drawing which shows the state which draws in a messenger wire in the 3rd process of 1st embodiment of this invention. It is a schematic sectional drawing which shows the state which draws in a flexible tube in the 3rd process of 1st embodiment of this invention. It is a schematic sectional drawing which shows the state which pulled in the flexible tube in the 3rd process of 1st embodiment of this invention. It is a schematic sectional drawing which shows the state which inject | poured the filling material in the 4th process of 1st embodiment of this invention. It is a schematic sectional drawing which shows the state before injection | pouring of a filling material in the 4th process of 1st embodiment of this invention. It is a schematic sectional drawing which shows the state after injection | pouring of a filling filler in the 4th process of 1st embodiment of this invention. It is a longitudinal cross-sectional view of FIG. It is a schematic sectional drawing which shows the state which pulled in the explosion wire in the 5th process of 1st embodiment of this invention. It is a schematic sectional drawing which shows the state which fractured the existing sewer pipe | tube by the blasting of the detonation line in the 5th process of 1st embodiment of this invention. It is a schematic sectional drawing which shows the relationship between the fragment of the existing sewer pipe crushed by the blasting of the explosion line in the 5th process of 1st embodiment of this invention, and the surrounding soil. It is a flowchart which shows the operation | work procedure of 2nd embodiment of this invention. It is a flowchart which shows the operation | work procedure of 3rd embodiment of this invention. It is a schematic sectional drawing which shows the vapor pressure crushing body used for 3rd embodiment of this invention. It is a schematic sectional drawing which shows the state which disperse | distributed the vapor pressure crushing body in 3rd embodiment of this invention. It is a flowchart which shows the operation | work procedure of 4th embodiment of this invention. It is a flowchart which shows the operation | work procedure of 5th embodiment of this invention. It is a flowchart which shows the operation | work procedure of 6th embodiment of this invention. It is a flowchart which shows the operation | work procedure of 7th embodiment of this invention. It is a flowchart which shows the operation | work procedure of 8th embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a flowchart showing a work procedure of a sewer pipe crushing method according to the first embodiment of the present invention.
The sewer pipe crushing method according to the present embodiment is based on the flowchart shown in FIG. 1, for example, an existing sewer pipe 1 as shown in FIG. It is a construction method in which it is crushed in the middle) and embedded as it is in the current position (in the soil) as the cured product group 21 (burial).

In this embodiment, for example, incidental operations such as road use permission, guide placement, signage installation, heavy machine forwarding, generator installation, and material storage are performed as necessary.
For example, as shown in FIG. 2, the existing sewer pipe 1 constitutes a pipe 5 by connecting manholes 2 and 3 arranged adjacent to each other underground. Each of the manholes 2 and 3 has an opening on the public road 4 side sealed with lids 2a and 3a. The existing sewer pipe 1 is constituted by connecting pipes 1a such as brick pile pipes, earthenware pipes, iron pipes, steel pipes, concrete pipes, vinyl chloride pipes, hard polyethylene pipes, hard polypropylene pipes, and the like.

Hereinafter, the present embodiment will be described based on the flowchart shown in FIG.
First, the in-pipe investigation process and the cleaning process of the first process (1) are performed.
In the first step (1), the construction drawing of the pipe 5 is confirmed before conducting an in-pipe investigation of the existing sewer pipe 1. In the construction drawing of the pipe 5, the positions of the manholes 2 and 3, the piping route of the existing sewer pipe 1, the number, position, and route of the branch pipes of the existing sewer pipe 1 are described.
Then, the positions of the manholes 2 and 3 are confirmed at the site. For example, as shown in FIG. 3, the lids 2 a and 3 a of the manholes 2 and 3 are removed to ventilate the manholes 2 and 3. Conduct an internal survey of 3 and confirm the inside of the existing sewer pipe 1.

Next, a cleaning process is performed. In the cleaning process, the inside of the existing sewer pipe 1 is cleaned. For example, a combination of a high-pressure washing device, a vacuum suction device, a waste water treatment device, etc. is used to wash and remove mud, dirt, etc. inside the existing sewer pipe 1.
Next, after cleaning the inside of the existing sewer pipe 1, or before and after cleaning, the inside of each pipe 1a in the existing sewer pipe 1 is confirmed with a fiberscope, an in-pipe camera, or the like.

Next, the mounting tube processing step of the second step (2) is performed.
Here, for example, as shown in FIG. 4, the attachment pipe 6 means a pipe that connects a public sewer 7 for receiving sewage from each home, building, factory, or the like to the existing sewer pipe 1.
In the second step (2), confirmation of construction drawings, confirmation of reservoirs (when sewage is received from households, buildings, factories, etc., confirmation of inspection traps (house trouts) provided near private land boundaries), piping routes, etc. Check the inside of the piping.

Next, a high-pressure cleaning device, a vacuum suction device, a wastewater treatment device, and the like are combined, and piping cleaning and cleaning in the reservoir are performed to clean and remove mud and dirt in the piping and the reservoir.
Furthermore, after cleaning, or before and after cleaning, the inside is checked with a fiberscope and a tube camera.
Next, after separating the upstream pipe from the reservoir, measures such as stopping the use of the reservoir are taken.
Thereafter, the inside of the attachment pipe 6 is closed with a filler, and the passage between the attachment pipe 6 and the existing sewer pipe 1 is blocked.

Next, the messenger wire drawing step and the flexible tube drawing step of the third step (3) are performed.
The third step (3) will be described with reference to FIGS.
Here, the messenger wire 8 is used as an example of the pulling member. The messenger wire 8 is, for example, an overhead ground wire for power and communication, a buried ground wire, an overhead wire, a support wire and a branch wire for a self-supporting cable, a surrounding wire for netting, a feeder cable support wire for an electric hoist, a hose It is a wire used for supporting wires, surrounding lines of agricultural fruit shelves, etc., and is composed of galvanized wires or aluminum steel wires. In the present embodiment, a wire rope is used as the messenger wire 8.

The messenger wire 8 is passed between the manholes 2 and 3 in order to draw the flexible tube 9 into the existing sewer pipe 1 via the manholes 2 and 3.
The flexible tube 9 refers to a tubular body having an inner diameter through which an auxiliary pulling member and pyrotechnics can be passed. For example, a water hose having an inner diameter of 13 mm to an inner diameter of 20 mm, an inner diameter of 10 mm to an inner diameter of 40 mm. A plastic tube or the like is used.

Next, the reason for using the flexible tube 9 will be described.
First, if the pyrotechnics were drawn into the existing sewer pipe 1 via the manholes 2 and 3 using the messenger wire 8, mortar or concrete was added to the manholes 2 as the filling material in the next step. When flowing into the existing sewer pipe 1 via 3, there is a risk that an impact caused by collision with sand or gravel will act to detonate the pyrotechnics or cut the pyrotechnics. If an accidental explosion occurs, it is very dangerous. If the pyrotechnics are cut even without an accidental explosion, the existing sewer pipe 1 cannot be crushed.
Therefore, if the flexible tube 9 is used, the pyrotechnic can be passed later, so there is no danger.

On the other hand, even if an attempt is made to pass the pyrotechnics after filling with the filling filler without using the flexible tube 9, a large tension acts due to friction with the filling filler, and the pyrotechnics cannot be easily passed. This is also the reason for using the flexible tube 9.
In the third step (3), for example, as shown in FIG. 5, the messenger wire 8 is manually moved from one manhole 2 to the other manhole 3 in the existing sewer pipe 1 that has been cleaned and confirmed. The messenger wire 8 is pulled out from the other manhole 3 through the existing sewer pipe 1 from one manhole 2.
Or, for example, as shown in FIG. 6, the air 12 of the compressor 10 is passed through the air hose 11 into the existing sewer pipe 1 while pushing the messenger wire 8 from one manhole 2 toward the other manhole 3 by hand. The messenger wire 8 is pulled out from the other manhole 3 through the existing sewer pipe 1 from one manhole 2.

Next, as shown in FIG. 7 and FIG. 8, an operation of drawing in the flexible tube 9 (hereinafter referred to as the messenger-containing flexible tube 9) through which the messenger wire 13 has been inserted in advance as an auxiliary pulling member is performed.
For example, as shown in FIG. 7, after the flexible tube 9 containing a messenger wire is fixed to one end of the messenger wire 8, the messenger wire 8 is pulled from the other manhole 3 side to be flexible as shown in FIG. The tube 9 is passed from one manhole 2 to the other manhole 3.
When the distance between the manholes 2 and 3 is long, a rope that can withstand tension, such as a thick rope, is once drawn with the messenger wire 8. Then, the flexible tube 9 which is wound around a drum is drawn. If the distance between the manholes 2 and 3 is short, the flexible tube 9 is pulled directly with the messenger wire 8 without performing a work of pulling a rope that can withstand tension, such as a thick rope, once with the messenger wire 8.

As shown in FIGS. 7 and 8, the flexible pipe 9 with messenger wire has a length of the pit of the manholes 2 and 3 to the length of the existing sewer pipe 1 between the manholes 2 and 3 based on the drawings and actual measurements. The flexible tube 9 cut by a length considering the surplus length is extended, and the messenger wire 13 is passed through the flexible tube 9. This messenger wire 13 is prepared separately from the messenger wire 8 for pulling the flexible tube 9.
The messenger wire 13 is similar to the messenger wire 8, for example, for power, communication overhead ground wire, buried ground wire, overhead wire, self-supporting cable support wire and branch line, net tension surrounding wire, and electric hoist These wires are used for power supply cable support lines, hose support lines, surrounding lines of agricultural fruit racks, etc., and are composed of galvanized strands or aluminum steel strands. In the present embodiment, a wire rope is used as the messenger wire 13 in the same manner as the messenger wire 8.

Also, as shown in FIG. 8, both ends of the flexible tube 9 with a messenger wire drawn in the third step (3) are extended to the public road 4 outside the manholes 2 and 3, and foreign matter from the outside. Take care to prevent intrusion.
Next, treatment of the tip of the flexible tube 9 with messenger wire will be described.
For example, both ends of the flexible tube 9 with a messenger wire are drawn out of the manholes 2 and 3.
Or the front-end | tip part of the flexible pipe | tube 9 containing a messenger wire is taped, and it prevents that the filling material 14 enters. Curing tape, vinyl tape, cloth adhesive tape, etc. can be used for tape stopper.

Alternatively, the tip of the flexible tube 9 with a messenger wire may be lightly screwed with a rag or the like and then taped.
Or you may tie up the front-end | tip part of the flexible tube 9 containing a messenger wire with a wire etc., and you may close | close like a sausage, for example.
However, in any case, the tip of the flexible tube 9 with messenger wire must be above the level at which the filling material 14 is injected.

Next, the intermediate filling material injection step and the curing step in the fourth step (4) are performed.
The fourth step (4) will be described with reference to FIGS.
Here, the filling material 14 is an example of the pressure medium, and is hardened in the ground with the passage of time, and includes the fragments of the existing sewer pipe 1 crushed in the next fifth step (5). Can solidify with the surrounding soil.
In the present invention, the pressure medium is a filling that naturally solidifies after being injected into the existing sewer pipe 1, a filling that is solidified when water is injected into the existing sewer pipe 1 and mixed, or the existing sewer pipe 1 The filling that does not harden after injection.

The filling material 14 is a filler that naturally solidifies after being poured into the existing sewer pipe 1 or a filler that is solidified when water is poured into the existing sewer pipe 1 after mixing.
Moreover, in order to transmit an impact force efficiently in the following 5th process (5), the thing before hardening is desirable for the filling material 14 inside. However, it can be used even after curing.
Examples of the filler that is used as a pressure medium and that naturally solidifies after being poured into the existing sewer pipe 1 include concrete, mortar, and plaster.
The filling that is used as a pressure medium and solidifies when water is injected into the existing sewer pipe 1 after filling and mixed, for example, concrete powder, gypsum powder or water-absorbing polymer (polyacrylic acid, polyvinyl alcohol, poly And so-called gelling agents and curing agents such as ether).
The filling that is used as a pressure medium and does not solidify after pouring into the existing sewer pipe 1 is, for example, water or muddy water.

In the fourth step (4), for example, as shown in FIGS. 9 to 12, the flexible tube 9 with messenger wire inserted into the existing sewer pipe 1 through the messenger wire 8 in the third step (3). The filling material 14 is filled between the outer peripheral portion of the inner space and the internal space of the existing sewer pipe 1.
For example, as shown in FIG. 10, the filling material 14 is pumped into the existing sewer pipe 1 through the injection pipe 16 by a pump disposed on the public road 4 near the manholes 2 and 3. Filled by the method. At that time, as shown in FIG. 11, a baffle (stop plate) 15 and an injection pipe 16 are attached to a part where the existing sewer pipe 1 opens into the manhole 2, and a part where the existing sewer pipe 1 opens into the manhole 3. Further, a baffle (stop plate) 17 and an exhaust pipe 18 are attached.

Then, as shown in FIG. 12, the filling material 14 is filled from the injection pipe 16, and the filling amount is confirmed by checking the degree of the filling material 14 overflowing from the exhaust pipe 18. As shown in FIG. 13, when the filling material 14 reaches the specified position of the exhaust pipe 18, it can be confirmed that the filling material 14 is filled over the entire area of the existing sewer pipe 1. FIG. 12 is a longitudinal sectional view of the existing sewer pipe 1 filled with the filling material 14.
Moreover, as the filling method of the filling material 14, for example, a method of allowing the filling material 14 to naturally flow into the existing sewer pipe 1 by gravity from above the manholes 2 and 3 may be employed.
In addition, when filling the filling material 14, the curing is performed so that the filling material 14 does not flow into the remaining piping or piping to be constructed in the future.
The flexible tube 9 with messenger wire may be passed through the injection tube 16.

Next, the explosion lead drawing process and the blasting process of the fifth process (5) are performed.
The fifth step (5) will be described with reference to FIGS.
Here, the explosive wire 19 is a string explosive used as an example of a pyrotechnic.
In the present invention, the pyrotechnic article means an explosion line, an explosion line attached so as to be scattered with explosives, or a rope attached so as to be dotted with a non-explosive gas generating agent.
The explosive wire is formed by covering a pen slit and processing it into a string shape. The explosive wire itself is an explosive, and can explode hydrous explosives and dynamite attached to itself. There are explosive wires of various thicknesses, and they can be used alone or in combination. The detonator can be detonated by an electric detonator, a detonator with a detonator, an industrial detonator (industrial detonator and detonator), or the like.

On the other hand, the explosives installed in a distributed manner are each started with an electric detonator, a detonator with a conducting tube, an industrial detonator (industrial detonator and a conducting wire), or attached to an explosive wire and used with a detonator in sequence. Is possible.
Further, for example, a non-explosive gas generating agent such as a vapor pressure crushing agent can be dispersed and used.
In the fifth step (5), as shown in FIG. 13, an explosive wire is connected to one end of a messenger wire 13 that is previously passed through a flexible tube 9 inserted in the existing sewer pipe 1 between the manholes 2 and 3. 19 is attached, and the explosive wire 19 is drawn into the flexible tube 9 while pulling out the messenger wire 13 in the direction of the manhole 3, for example. When the explosive wire 19 is drawn into the flexible tube 9, if friction is large, water may be poured into the flexible tube 9 for lubrication.

Thereafter, a detonator (not shown) such as an electric detonator is attached to the end of the detonation wire 19.
Next, a blasting process is performed.
In the blasting process, the worker is evacuated and remotely detonated after safety confirmation. Many detonate electrical detonators using electrical detonators, blasters, blasting buses longer than 30 meters, and auxiliary buses. You may use a detonator with a guide tube, a guide tube and an igniter.
When the detonation line 19 is detonated, the destructive power of the detonation line 19 is overwhelmingly higher than the strength of the existing sewer pipe 1 and the like, so the destructive force of the detonation line 19 propagates through the filling material 14 and is already installed. The sewer pipe 1 is crushed. At that time, since the existing sewer pipe 1 is surrounded by the surrounding soil, the filling material 14 has no escape place. For example, as shown in FIG. 15, countless fragments of the existing sewer pipe 1 on the spot. X and surrounding soil Y are also integrated to generate a cured product group 21.

In addition, by adjusting the explosion pressure, the surrounding filler 14 soaks into the surrounding soil, and the hardened material group 21 in which the countless pieces X of the existing sewer pipe 1 are integrated with the surrounding soil Y over a wide range. Can be generated.
Next, the removal step of the sixth step (6) is performed.
After confirming the explosion sound, more than 5 minutes have passed since the detonation, and then remove the blasting bus, auxiliary bus, blaster, detonator leg, equipment used for curing, etc. drawn into the pits of manholes 2 and 3.
Close the lids 2a and 3a of the manholes 2 and 3 to restore the current situation when the road is occupied.
As described above, according to the present embodiment, by performing the first step (1) to the sixth step (6) shown in FIG. 1, the existing sewer pipe 1 is crushed, and the existing sewer pipe 1 Since the innumerable pieces X can be made into the hardened material group 21 in the state of being included in the surrounding soil Y at the current underground position, after the existing sewer pipe 1 is crushed, the existing sewer pipe 1 is also installed at the position. When a sewer pipe is newly installed by underground excavation even at a position different from the sewer pipe 1, the cured product group 21 does not become an obstacle.

Moreover, according to this embodiment, the existing sewer pipe 1 is crushed by carrying out the first step (1) to the sixth step (6) shown in FIG. 1, and countless fragments of the existing sewer pipe 1 are obtained. Since X can be made into the hardened material group 21 in the state of being included in the surrounding soil Y at the current underground position, the existing sewer pipe 1 is used to bury the existing sewer pipe 1 as in the past. The work of filling mortar or the like inside becomes unnecessary.
Moreover, according to the present embodiment, as in the prior art, the operation of filling the existing sewer pipe 1 with mortar or the like, which is required when the existing sewer pipe 1 is buried, The work to take out becomes unnecessary. And since the innumerable debris X of the existing sewer pipe 1 can be made into the hardened | cured material group 21 in the state enclosed by the surrounding soil Y, even if a liquefaction phenomenon occurs after that, the hardened | cured material group 21 is formed. Even if it is raised, there is no problem that the existing sewer pipe itself is raised and the public road 4 cannot be used as in the prior art.
In addition, when the explosive or the non-explosive gas generating agent is attached to the explosive wire 19 in the fifth step (5), an extremely strong stress is applied from the inside of the existing sewer pipe 1 due to the explosive reaction. be able to.

(Second embodiment)
FIG. 16 is a flowchart showing a sewer pipe crushing method according to the second embodiment of the present invention.
In the present embodiment, in the fourth step (4), instead of the filling medium 14 that is a pressure medium, water or muddy water is used as the pressure medium, and the sewer pipe crushing method according to the first embodiment of the present invention is used. Is different.
In this embodiment, in the fourth step (4), for example, as shown in FIGS. 9 to 12, the messenger wire inserted into the existing sewer pipe 1 via the messenger wire 8 in the third step (3). Water or mud water is filled between the outer peripheral portion of the inlet flexible pipe 9 and the internal space of the existing sewer pipe 1 instead of the intermediate filler 14.

For example, as shown in FIG. 10, a water supply pipe is connected to an injection pipe 16, and tap water is pumped at a pumping pressure that does not exceed 2 MPa and injected into an existing sewer pipe 1. After the injection, the pipe from the water supply was removed and the related vehicle was withdrawn.
In the case of muddy water, as shown in FIG. 10, the muddy water is transported by a tank car, the tank car piping is connected to the injection pipe 16, and the muddy water is pumped at a pressure not exceeding 2 MPa. Inject into the sewer pipe 1. After the injection, the tank car piping was removed and the related vehicle was withdrawn.
Water or muddy water is a medium that causes the impact force from the explosive line 19, which is a pyrotechnic product, to act from the inside of the existing sewer pipe 1 and efficiently crush the existing sewer pipe 1 in the same manner as the filling material 14. It becomes.

  When water or muddy water is used, the existing sewer pipe 1 cannot be integrated and hardened with the surrounding soil Y on the spot after the existing sewer pipe 1 is crushed. 1 is reliably crushed, and countless fragments X are scattered in the surrounding soil Y at the current underground position. The water or muddy water used as the pressure medium is absorbed by the surrounding soil Y at the current underground position. And even if the liquefaction phenomenon occurs afterwards, even if the countless fragments X of the existing sewer pipe 1 may rise, the existing sewer pipe itself rises and the public road 4 can be used as before. Problems such as disappearance do not occur.

(Third embodiment)
FIG. 17 is a flowchart showing a sewer pipe crushing method according to the third embodiment of the present invention.
This embodiment is different from the crushing method for sewer pipes according to the first embodiment of the present invention in that the steam pressure crushed body 22 is used in place of the explosion line 19 in the fifth step (5).
For example, as shown in FIG. 18, the vapor pressure crushing body 22 is made of a vapor pressure crushing drug cartridge 23 to which an ignition tool 24 is attached, for example, a synthetic material rope having a diameter of about 10 mm, a natural material rope such as hemp or cotton. Or it is comprised by fixing to the rope 26, such as a wire rope, with a vinyl tape etc. at intervals of 1 m. The ignition tool 24 is connected in series via a leg wire 25. All of the ignition tools 24 are preferably connected in series.

  The vapor pressure crushing drug cartridge 23 is known as, for example, a gunsizer (trade name: manufactured by Nippon Koki Co., Ltd.). A gancizer is a crushing agent that can crush brittle bodies such as rocks, bedrock, and concrete instantaneously with low vibration and low noise by water vapor pressure generated during thermal decomposition of the agent. It comprises a crushing agent in which an additive that generates gas crushing pressure by gasifying a mixture of an oxidizing agent and a reducing agent as a heat generating agent, and an ignition tool for igniting it. Crushing with a gunsizer involves drilling a rock, bedrock or concrete at a predetermined interval and depth, loading a gunsizer into the hole, stemming the remaining hole with sand, etc., and then crushing chemicals with an ignition tool. The procedure for starting the reaction is carried out. The Gunsizer is non-explosive and has the ability to instantly break brittle bodies. Its features are as follows.

・ Since the crushing procedure is based on the blasting method and is a crushing chemical with a non-explosive composition, no license is required for use.
-Brittle bodies with a tensile strength of about 200 kgf / cm ² such as rocks, bedrock, and concrete can be instantly crushed.
-The environment temperature for the place to be crushed is -15 ° C to + 75 ° C, and constant crushing is possible.
・ Compared with the blasting method, vibration and noise during crushing are small, and the vibration speed value is about 50% and the noise level (A characteristic) is about 15 dB lower.
・ Because non-explosives are weak, they can be constructed according to explosives in the vicinity of the security property, and the construction time can be shortened.

In this embodiment, the rope 26 is fixed to the tip of the messenger wire 13 that has passed through the flexible tube 9, and the vapor pressure crushing body 22 attached to the rope 26 with a space is sequentially drawn into the flexible tube 9.
Thereby, as shown in FIG. 19, the vapor pressure crushing chemical | medical agent cartridges 23 are disperse | distributed and arrange | positioned in the flexible pipe | tube 9 penetrated in the existing sewer pipe | tube 1 at intervals of 1 m.
If the length of the flexible tube 9, that is, the distance between the manholes 2 and 3, is shorter than the length of the leg line 25, it is not impossible to bring all the leg lines 25 out of the flexible tube 9. However, since the distance between the manholes 2 and 3 is usually several tens of meters with respect to the length m of the leg wires 25, they are connected in series.
The connection part of the connection is insulated with a self-bonding tape, vinyl tape, resin cap or the like.
The leg wire 25 is also secured to the rope with vinyl tape as appropriate.
The dose of one vapor pressure crushing drug cartridge 23 is 60 g to 120 g.
Other operations are the same as those in the first embodiment.
In the present embodiment, the same effects as the first embodiment can be obtained, and the explosives consumption permission in the explosives control law is not required.

(Fourth embodiment)
FIG. 20 is a flowchart showing a sewer pipe crushing method according to the fourth embodiment of the present invention.
This embodiment differs from the sewer pipe crushing method according to the second embodiment of the present invention in that the steam pressure crusher 22 is used instead of the detonation wire 19 in the fifth step (5).
The vapor pressure crushed body 22 is attached with an igniter 24, and is fixed to a rope 26 having a diameter of about 10 mm with a vinyl tape at an interval of 1 m, for example. The ignition tool 24 is connected in series via a leg wire 25.
Also in this embodiment, the same operational effects as those of the second embodiment can be obtained, and the explosives consumption permission in the explosives control law is not required.

(Fifth embodiment)
FIG. 21 is a flowchart showing a sewer pipe removal method according to the fifth embodiment of the present invention.
In this embodiment, in order to newly install a sewer pipe at the same position as the existing sewer pipe 1 after performing the sewer pipe crushing method according to the first embodiment of the present invention, This is a method of removing an existing sewer pipe that removes a cured product group 21 (see FIG. 15) in which countless pieces X are integrated with surrounding soil Y.
Accordingly, in the present embodiment, the operation is performed in the same procedure as the sewer pipe crushing method according to the first embodiment of the present invention until the removal step of the sixth step (6), and thus description thereof is omitted.

In this embodiment, following the removal step of the sixth step (6), the excavation step, the earth retaining step, and the removal step of the seventh step (7) are performed.
Here, the excavation process, the earth retaining process, and the removal process are excavating from the surface to the position of the existing sewer pipe 1 while retaining the earth, and countless pieces X of the existing sewer pipe 1 together with the surrounding soil Y It means removing the integrated cured product group 21 (see FIG. 15).
The removal process by excavation consists of the following procedures.
First, the pavement is removed.
When the surface of the public road 4 is paved with asphalt or concrete, the pavement is cut along the planned excavation line with a cutter.
Remove the pavement and remove it with a back four.

Next, excavation work is performed.
Grooves are dug with a backfor, but in order to prevent collapse, digging is carried out while installing earth retaining plates (collapse prevention) using steel plates and H steel materials.
In this embodiment, since the hardened | cured material group 21 (refer FIG. 15) which integrated the countless piece X of the existing sewer pipe 1 with the surrounding soil Y has already been produced | generated, a person falls in a groove | channel and cut | disconnects. There is no need, you can dig while breaking back back.
Next, the filling step of the cut groove and the original restoration step of the eighth step (8) are performed.
Here, the cutting groove filling process and the original restoration process are the removal of the upper part of the manholes 2 and 3, filling the groove dug in the back fork with the backfilling material, and compacting with vibration tamper, rammers, etc. This is a process for restoring the original state.

As described above, according to the present embodiment, prior to the excavation work for taking out the existing sewer pipe 1, the existing sewer pipe 1 is crushed in the basement in advance. The width of the cut groove for taking out the cured product group 21 (see FIG. 15) integrated with the surrounding soil Y is narrow, and the cut work can be easily performed.
Moreover, according to this embodiment, since the operation | work which a person enters into a groove | channel and cut | disconnects the existing sewer pipe | tube 1 becomes unnecessary, an open operation can be performed safely and rapidly.

(Sixth embodiment)
FIG. 22 is a flowchart showing a method for removing a sewer pipe according to the sixth embodiment of the present invention.
In this embodiment, in order to install a new pipe in the same position as the existing sewer pipe 1 after performing the crushing method of the sewer pipe according to the fourth embodiment of the present invention, the countless number of the existing sewer pipe 1 This is a sewer pipe removal method for removing the hardened material group 21 (see FIG. 15) in which the fragments X are integrated with the surrounding soil Y.
Accordingly, in the present embodiment, the operation is performed in the same procedure as the sewer pipe crushing method according to the first embodiment of the present invention until the removal step of the sixth step (6), and thus description thereof is omitted.

In this embodiment, following the removal step of the sixth step (6), the excavation step, the earth retaining step, and the removal step of the seventh step (7) are performed.
Here, the excavation process, the earth retaining process, and the removal process are excavating from the surface to the position of the existing sewer pipe 1 while retaining the earth, and countless pieces X of the existing sewer pipe 1 together with the surrounding soil Y It means removing the integrated cured product group 21 (see FIG. 15).
The removal process by excavation consists of the following procedures.
First, the pavement is removed.
When the surface of the public road 4 is paved with asphalt or concrete, the pavement is cut along the planned excavation line with a cutter.
Remove the pavement and remove it with a back four.

Next, excavation work is performed.
Grooves are dug with a backfor, but in order to prevent collapse, digging is carried out while installing earth retaining plates (collapse prevention) using steel plates and H steel materials.
In this embodiment, since the hardened | cured material group 21 (refer FIG. 15) which integrated the countless piece X of the existing sewer pipe 1 with the surrounding soil Y has already been produced | generated, a person falls in a groove | channel and cut | disconnects. There is no need, you can dig while breaking back back.

Next, the filling step of the cut groove and the original restoration step of the eighth step (8) are performed.
Here, the cutting groove filling process and the original restoration process are the removal of the upper part of the manholes 2 and 3, filling the groove dug in the back fork with the backfilling material, and compacting with vibration tamper, rammers, etc. This is a process for restoring the original state.
As described above, according to the present embodiment, prior to the excavation work for taking out the existing sewer pipe 1, the existing sewer pipe 1 is crushed in the basement in advance. The width of the cut groove for taking out the cured product group 21 (see FIG. 15) integrated with the surrounding soil Y is narrow, and the cut work can be easily performed.
Moreover, according to this embodiment, since the operation | work which a person enters into a groove | channel and cut | disconnects the existing sewer pipe | tube 1 becomes unnecessary, an open operation can be performed safely and rapidly.

(Seventh embodiment)
FIG. 23 is a flowchart showing a method for removing a sewer pipe according to the seventh embodiment of the present invention.
In this embodiment, after performing the sewer pipe crushing method according to the second embodiment of the present invention, in order to install a new pipe at the same position as the existing sewer pipe 1, it is scattered in the surrounding soil Y. This is a sewer pipe removal method for removing countless pieces X of existing sewer pipes 1.
Also in this embodiment, prior to the excavation work for taking out the existing sewer pipe 1, the existing sewer pipe 1 is crushed in the basement in advance, so that the existing sewer pipe 1 is removed in the same manner as in the sixth embodiment of the present invention. The width of the cut groove for taking out is narrow, and the cut work can be easily performed.
Moreover, according to this embodiment, since the operation | work which a person enters into a groove | channel and cut | disconnects the existing sewer pipe | tube 1 becomes unnecessary, an open operation can be performed safely and rapidly.

(Eighth embodiment)
FIG. 24 is a flowchart showing a method for removing a sewer pipe according to the eighth embodiment of the present invention.
In this embodiment, after performing the sewer pipe crushing method according to the second embodiment of the present invention, in order to install a new pipe at the same position as the existing sewer pipe 1, it is scattered in the surrounding soil Y. This is a sewer pipe removal method for removing countless pieces X of existing sewer pipes 1.
Also in this embodiment, prior to the excavation work for taking out the existing sewer pipe 1, the existing sewer pipe 1 is crushed in the basement in advance, so that the existing sewer pipe 1 is removed in the same manner as in the sixth embodiment of the present invention. The width of the cut groove for taking out is narrow, and the cut work can be easily performed.
Moreover, according to this embodiment, since the operation | work which a person enters into a groove | channel and cut | disconnects the existing sewer pipe | tube 1 becomes unnecessary, an open operation can be performed safely and rapidly.

Embodiments of the present invention will be described below with reference to the drawings.
Example 1
Example 1 corresponds to the sewer pipe crushing method according to the first embodiment of the present invention described above.
The work procedure of this example will be described based on the flowchart showing the work procedure of the sewer pipe crushing method according to the first embodiment of the present invention shown in FIG. The work procedure of this example will be described with reference to FIGS. 1 to 15 as in the first embodiment of the present invention.

First, the in-pipe investigation process and the cleaning process of the first process (1) are performed.
In the in-pipe investigation process, the actual position of the local manholes 2 and 3 was combined with the piping drawing of the existing sewer pipe 1 to confirm the position of the buried pipe in the existing sewer pipe 1. In this embodiment, the interval between the manholes 2 and 3 is 30 m, and the pit depth of the manholes 2 and 3 is 3.5 m. The existing sewer pipe 1 is a JIS hard vinyl chloride pipe VP200 (inner diameter 194 mm, outer diameter 216 mm, 4 m standard length, and the end is sealed with an O-ring).

In the cleaning process, after traffic control is performed and safety is ensured, the lids 2a and 3a of the manholes 2 and 3 are removed, and ventilation is performed by hanging a 300mm air duct in the pits of the manholes 2 and 3, as shown in FIG. did. The status of the existing sewer pipe 1 was confirmed in the pits of manholes 2 and 3 while confirming safety with an oximeter.
The existing sewer pipe 1 that does not carry out cleaning was installed with a simple water stop plug. In the existing sewer pipe 1 to be cleaned, a washing nozzle is inserted from the high pressure washing car, and the suction hose of the strong mud truck is hung in the pits of the manholes 2 and 3, and the washing waste water and sludge are sucked into the tank. .
The existing sewer pipe 1 after completion of the cleaning was confirmed visually and with a camera inside the pipe.

Next, the mounting tube processing step of the second step (2) is performed.
The confirmation of the attachment pipe (branch line pipe) 6 was also confirmed from the drawings and observation of the inner surface with a camera. Quick setting cement was injected into the passage of the mounting pipe 6 on the side of the public fence 7 and sealed.
Next, the messenger wire drawing step and the flexible tube drawing step of the third step (3) are performed.
As shown in FIG. 5, a messenger wire (trade name: silver glass line, diameter 7 mm, length 100 m) 8 was pushed in from one manhole 2, penetrated the existing sewer pipe 1, and pulled out from the other manhole 3.

  Based on the drawings and actual measurements, the length of the existing sewer pipe 1 between the manholes 2 and 3 (30 m), the rising length of the pits of the manholes 2 and 3 (3 m × 2), and the extra length (3 m × 2) The flexible tube (CD tube (Combined Duct) with outer diameter of 21mm, inner diameter of 16mm, length of 42m) 9 is extended by taking into consideration the messenger wire (trade name: silver glass line, diameter) 7 mm, length 50 m) 13 was passed through the flexible tube 9 to produce the flexible tube 9 containing the messenger wire 13.

Next, as shown in FIGS. 6 and 7, the flexible tube 9 containing the messenger wire 13 is fixed to the flexible tube 9 containing the messenger wire 13 at the end of the messenger wire 8 passed between the manholes 2 and 3 in advance. It penetrated between manholes 2 and 3.
Next, the intermediate filling material injection step and the curing step in the fourth step (4) are performed.
In the filling material injection step, as shown in FIG. 10, a baffle (stop plate) 15 and an injection pipe 16 are attached to a portion where the existing sewer pipe 1 opens into the manhole 2, and the existing sewer pipe 1 is attached to the manhole 3. A baffle (stop plate) 17 and an exhaust pipe 18 were attached to the opening, and the injection pipe 18 was connected to a loading pipe of a squeeze-type concrete pump car.

Ready mix concrete (usually 18-18-20-N) of mixer truck is pumped with about 2 m2 of rice at a pressure not exceeding 2 MPa, and concrete is injected into the existing sewer pipe 1 as shown in FIG. (2 sq.m includes discarded concrete).
After the injection, the piping from the injection pipe 16 and the pump car was removed, and the pump car, the mixer car, and the related vehicles were retracted.
Next, the explosion lead drawing process and the blasting process of the fifth process (5) are performed.
About 1 liter of water was poured into the flexible tube 9 in advance.

One explosive wire 19 (Hikari explosive wire, 10 g / m pen slit) is fixed to the tip of the messenger wire 13 that passes through the flexible tube 9 near one manhole 2 and the other manhole. The messenger wire 13 was pulled from the third side, and the explosive wire 19 was inserted into the flexible tube 9 as shown in FIG.
The explosive wire 19 has a length of about 20 cm to 50 cm at both ends with respect to a length of 30 m of the existing sewer pipe 1, and the end of the flexible tube 9 is cut at the rising base of the flexible tube 9. Exposed.

The amount of explosive wire 19 used is one or two in the case of a JIS hard vinyl chloride pipe VP100 or smaller diameter size. In the case of JIS hard vinyl chloride pipe VP150, the number is 1 to 3. In the case of JIS hard vinyl chloride pipe VP200, the number is 1 to 5.
That is, the amount of explosive wire 19 used per 1 m of the hard vinyl chloride tube is 1 to 5 and the amount of explosive is 10 to 50 g. If the amount of explosives increases, the degree of crushing of the existing sewer pipe 1 increases, and the size of the fragments of the existing sewer pipe 1 decreases.
If the thickness of the hard vinyl chloride pipe is increased, or if a ceramic pipe or concrete pipe is used for the existing sewer pipe 1, the number of explosive wires and the amount of explosives are increased as appropriate.

The total length of the detonation wire 19 is preferably the same as the length of the existing sewer pipe 1 to be crushed or a length that extends about 30 to 50 cm at both ends.
In the blasting process, an ignition location was secured at a safe location 30 m or more away from the manholes 2 and 3, and a blasting bus whose end was short-circuited was temporarily wired into the pits of the manholes 2 and 3. A VCT rubber insulated cabtyre cord was used for the blast bus.
The No. 6 electric detonator was firmly fixed to one end of the detonation wire 19 with tape, and the leg was connected to one end of the blasting bus using an auxiliary bus.

At each work, circuit continuity was confirmed with a photovoltaic cell type safety continuity tester.
When the connection to the blasting bus was finally completed, the circuit resistance was confirmed by a blasting tester at a safe ignition location.
After notifying the blasting work to the surroundings with a siren and loudspeaker, when the blasting bus was short-circuited, it was connected to the blasting device (trade name: Nichiyu, DX-50-N), and ignited and detonated according to the countdown.
Next, the explosion sound was confirmed, and after more than 5 minutes had passed since the detonation, the blasting bus, auxiliary bus, detonator leg, etc. drawn into the pits of manholes 2 and 3 were removed.
When the lids 2a and 3a of the manholes 2 and 3 were closed and the road was occupied, the current situation was restored.

(Example 2)
Example 2 corresponds to the sewer pipe crushing method according to the third embodiment of the present invention described above.
The work procedure of this example will be described based on the flowchart showing the work procedure of the sewer pipe crushing method according to the third embodiment of the present invention shown in FIG. The work procedure of this example will be described with reference to FIGS. 2 to 15 used in the first embodiment of the present invention.

First, the in-pipe investigation process and the cleaning process of the first process (1) are performed.
In the in-pipe investigation process, the actual position of the local manholes 2 and 3 was combined with the piping drawing of the existing sewer pipe 1 to confirm the position of the buried pipe in the existing sewer pipe 1. In this embodiment, the interval between the manholes 2 and 3 is 30 m, and the pit depth of the manholes 2 and 3 is 3.5 m. The existing sewer pipe 1 is a JIS hard vinyl chloride pipe VP200 (inner diameter 194 mm, outer diameter 216 mm, 4 m standard length, and the end is sealed with an O-ring).

In the cleaning process, after traffic control is performed and safety is ensured, the lids 2a and 3a of the manholes 2 and 3 are removed, and ventilation is performed by hanging a 300mm air duct in the pits of the manholes 2 and 3, as shown in FIG. did. The status of the existing sewer pipe 1 was confirmed in the pits of manholes 2 and 3 while confirming safety with an oximeter.
The existing sewer pipe 1 that does not carry out cleaning was installed with a simple water stop plug. In the existing sewer pipe 1 to be cleaned, a washing nozzle is inserted from the high pressure washing car, and the suction hose of the strong mud truck is hung in the pits of the manholes 2 and 3, and the washing waste water and sludge are sucked into the tank. .
The existing sewer pipe 1 after completion of the cleaning was confirmed visually and with a camera inside the pipe.

Next, the mounting tube processing step of the second step (2) is performed.
The confirmation of the attachment pipe (branch line pipe) 6 was also confirmed from the drawings and observation of the inner surface with a camera. Quick setting cement was injected into the passage of the mounting pipe 6 on the side of the public fence 7 and sealed.
Next, the messenger wire drawing step and the flexible tube drawing step of the third step (3) are performed.
As shown in FIG. 5, a messenger wire (trade name: silver glass line, diameter 7 mm, length 100 m) 8 was pushed in from one manhole 2, penetrated the existing sewer pipe 1, and pulled out from the other manhole 3.

  Based on the drawings and actual measurements, the length of the existing sewer pipe 1 between the manholes 2 and 3 (30 m), the rising length of the pits of the manholes 2 and 3 (3 m × 2), and the extra length (3 m × 2) A flexible tube (CD tube (Combined Duct) with an outer diameter of 60 mm, an inner diameter of 54 mm, and a length of 42 m) 9 is extended by taking into consideration the messenger wire (trade name: silver glass line, diameter) 7 mm, length 50 m) 13 was passed through the flexible tube 9 to produce the flexible tube 9 containing the messenger wire 13.

Next, as shown in FIGS. 7 and 8, the flexible tube 9 containing the messenger wire 13 is fixed to the end of the messenger wire 8 passed between the manholes 2 and 3 in advance. It penetrated between manholes 2 and 3.
Next, the intermediate filling material injection step and the curing step in the fourth step (4) are performed.
In the filling material injection step, as shown in FIG. 10, a baffle (stop plate) 15 and an injection pipe 16 are attached to a portion where the existing sewer pipe 1 opens into the manhole 2, and the existing sewer pipe 1 is attached to the manhole 3. A baffle (stop plate) 17 and an exhaust pipe 18 were attached to the opening, and connected to a loading pipe of a squeeze concrete pump car.

Ready mix concrete (usually 18-18-20-N) of mixer truck is pumped with about 2 m2 of rice at a pressure not exceeding 2 MPa, and concrete is injected into the existing sewer pipe 1 as shown in FIG. (2 sq.m includes discarded concrete).
After the injection, the piping from the injection pipe 16 and the pump car was removed, and the pump car, the mixer car, and the related vehicles were retracted.

Next, the evaporative pressure crushing body drawing step and the blasting step of the fifth step (5) are performed.
First, in the evaporative pressure crushing body drawing-in step, as shown in FIG. 19, 120 g of the vapor pressure crushing drug cartridges 23 are dispersed and arranged at intervals of 1 m in the flexible tube 9 inserted into the existing sewer pipe 1. A vapor pressure crushed body 22 is used.
The evaporative pressure crushing body 22 has a 120 g steam pressure crushing chemical cartridge 23 attached with an ignition tool 24 fixed to a rope 26 having a diameter of about 10 mm with a vinyl tape at intervals of 1 m. The ignition tool 24 is connected in series via a leg wire 25.
5 liters of water was poured into the flexible tube 9 in advance.

The rope 26 was fixed to the tip of the messenger wire 13 that passed through the flexible tube 9, and the evaporative pressure crushed material 22 was sequentially drawn into the flexible tube 9.
Next, in the blasting process, an ignition location was secured at a safe location 30 m or more away from the manholes 2 and 3, and the blasting bus with the end shorted was temporarily wired into the pits of the manholes 2 and 3. A VCT rubber insulated cabtyre cord was used for the blast bus.
The leg wire was connected to one end of the blasting bus using an auxiliary bus.
At each work, circuit continuity was confirmed with a photovoltaic cell type safety continuity tester.
When the connection to the blasting bus was finally completed, the circuit resistance was confirmed by a blasting tester at a safe ignition location.
After notifying the blasting work to the surroundings with a siren and loudspeaker, when the blasting bus was short-circuited, it was connected to the blasting device (Nichiyu, DX-50-N), and ignited and detonated according to the countdown.

Next, the removal step of the sixth step (6) is performed.
In the removal process, the explosion sound was confirmed, and after 5 minutes had passed since the detonation, blasting buses, auxiliary buses, leg wires, etc. drawn into the pits of manholes 2 and 3 were removed.
The end of the rope 26 was appropriately cut and removed.
When the lids 2a and 3a of the manholes 2 and 3 were closed and the road was occupied, the current situation was restored.

(Example 3)
Example 3 corresponds to the sewer pipe crushing method according to the fifth embodiment of the present invention described above.
The work procedure of this example will be described based on the flowchart showing the work procedure of the sewer pipe crushing method according to the sixth embodiment of the present invention shown in FIG. The work procedure of this example will be described with reference to FIGS. 2 to 15 used in the first embodiment of the present invention.
In Example 2, following the solidification of the concrete used in Example 1, the following operation is performed.

First, in the seventh step (7), in the excavation step, the earth retaining step, and the removal step, a curing period (several days to several tens of days) is provided until the concrete in the soil is solidified.
Next, asphalt and concrete are cut along the planned drilling line with a diamond wheel cutter.
After that, use the back fore and dump truck to peel and remove the pavement. Next, prepare the earth retaining.
If the excavation depth is deep or the soil is soft, earth retaining is carried out.
Use steel plates, supporting steel, and jacks for the earth retaining.

Next, groove cutting was performed with a back-for. While dropping two steel plates in order, the steel plate was supported on the inside by using an H steel material and a screw-type inner jack.
Finally, excavation was carried out until the solidified concrete was visible.
The concrete solid body was hooked on the nail of the back fork, and it was dug in sequence while breaking.
When the strength of the solidified body was too high, it was hit with a breaker (0.25 ton breaker for crushing foundation concrete), cut, and recovered with a back-for.
Next, the backfilling material was put into the groove, and backfilling was performed while removing the earth retaining material. After backfilling, it was fully compacted with vibration tampers, rammers, etc.
We spread gravel, made a foundation, and re-paved with asphalt.
After that, the current situation was restored by applying white lines.

DESCRIPTION OF SYMBOLS 1 Existing sewer pipe 1a Pipe 2, 3 Manhole 2a, 3a Lid 4 Public road 5 Pipe rod 6 Mounting tube 7 Public rod 8, 13 Messen wire 9 Flexible pipe 14 Filling material 19 Explosive wire 21 Cured material group 22 Vapor pressure Fractured body 23 Steam pressure crushing drug cartridge 24 Ignition tool 25 Leg wire 26 Rope X Countless fragments Y of existing sewer pipe 1 Surrounding soil

Claims (13)

Arranging a flexible pipe with pyrotechnics in an existing sewer pipe;
Filling the existing sewer pipe with a pressure medium;
Decomposing the existing sewer pipe and decomposing the existing sewer pipe. Inserting a traction member between two manholes arranged adjacent to an existing sewer pipe and the existing sewer pipe;
Attaching a flexible tube to the pulling member, and drawing the flexible tube from the one manhole through the existing sewer pipe to the other manhole via the pulling member;
Filling the existing sewer pipe with a pressure medium;
Drawing a pyrotechnic into the flexible tube;
Decomposing the existing sewer pipe and decomposing the existing sewer pipe. Inserting a traction member between two manholes arranged adjacent to an existing sewer pipe and the existing sewer pipe;
Attaching a flexible tube through which the auxiliary traction member is inserted to the traction member, and drawing the flexible tube from the one manhole through the existing sewer pipe to the other manhole via the traction member;
Filling the existing sewer pipe with a pressure medium;
Attaching a pyrotechnic to the auxiliary pulling member, pulling the auxiliary pulling member and pulling the pyrotechnic into the flexible tube;
Decomposing the existing sewer pipe and decomposing the existing sewer pipe. In the sewer pipe crushing method according to any one of claims 1 to 3,
The said flexible pipe is comprised by the tubular body which has an internal diameter which can let pyrotechnics pass inside. The crushing method of the sewer pipe characterized by the above-mentioned. In the sewer pipe crushing method according to any one of claims 1 to 4,
The pressure medium is a filling that naturally solidifies after being injected into the existing sewer pipe, a filler that is solidified when water is injected into the existing sewer pipe and then mixed, or a filler that does not harden after being injected into the existing sewer pipe A sewer pipe crushing method characterized by that. In the sewer pipe crushing method according to claim 5,
The filling that naturally solidifies after pouring into the existing sewer pipe is concrete, mortar or plaster,
The filling which hardens when water is injected into the existing sewer pipe after filling and mixed is concrete powder, gypsum powder or water-absorbing polymer,
The filling method that does not solidify after pouring into the existing sewer pipe is water or muddy water. In the sewer pipe crushing method according to any one of claims 1 to 6,
The pyrotechnic product is a sewer pipe crushing method, characterized in that the explosive wire, the explosive wire attached so as to be scattered with explosives, or the rope attached so as to be scattered with a non-explosive gas generating agent. Inserting a traction member between two manholes arranged adjacent to an existing sewer pipe and the existing sewer pipe;
Attaching a flexible tube through which the auxiliary traction member is inserted to the traction member, and drawing the flexible tube from the one manhole through the existing sewer pipe to the other manhole via the traction member;
Filling the existing sewer pipe with concrete, mortar or plaster;
Attaching a pyrotechnic to the auxiliary pulling member, pulling the auxiliary pulling member and pulling the pyrotechnic into the flexible tube;
Detonating the pyrotechnics and destroying the existing sewer pipe,
In the step of detonating the pyrotechnics and destroying the existing sewer pipe, the concrete, mortar, or gypsum is hardened so as to enclose innumerable fragments of the existing sewer pipe with surrounding soil, A sewer pipe crushing method characterized by preventing the diffusion of countless pieces of sewer pipes. Inserting a traction member between two manholes arranged adjacent to an existing sewer pipe and the existing sewer pipe;
Attaching a flexible tube through which the auxiliary traction member is inserted to the traction member, and drawing the flexible tube from the one manhole through the existing sewer pipe to the other manhole via the traction member;
Filling the existing sewer pipe with concrete powder, gypsum powder or water-absorbing polymer and injecting and mixing water; and
Attaching a pyrotechnic to the auxiliary pulling member, pulling the auxiliary pulling member and pulling the pyrotechnic into the flexible tube;
Detonating the pyrotechnics and destroying the existing sewer pipe,
In the step of detonating the pyrotechnics and destroying the existing sewer pipe, the concrete powder, gypsum powder or a mixture of water-absorbing polymer and water surrounds the countless pieces of the existing sewer pipe. A sewer pipe crushing method characterized in that it hardens in a form enclosed with soil and prevents the diffusion of countless pieces of the existing sewer pipe. Inserting a traction member between two manholes arranged adjacent to an existing sewer pipe and the existing sewer pipe;
Attaching a flexible tube through which the auxiliary traction member is inserted to the traction member, and drawing the flexible tube from the one manhole through the existing sewer pipe to the other manhole via the traction member;
Filling the existing sewer pipe with water or muddy water;
Attaching a pyrotechnic to the auxiliary pulling member, pulling the auxiliary pulling member and pulling the pyrotechnic into the flexible tube;
Detonating the pyrotechnics and destroying the existing sewer pipe,
In the step of detonating the pyrotechnics and destroying the existing sewer pipe, the water or muddy water causes the impact force of the pyrotechnic explosion to act from the inside of the existing sewer pipe, A sewer pipe crushing method characterized in that it becomes a medium for efficiently crushing sewer pipes, and countless pieces of the crushed existing sewer pipes are scattered in the surrounding soil. Inserting a traction member between two manholes arranged adjacent to an existing sewer pipe and the existing sewer pipe;
A step of attaching a flexible tube for inserting an auxiliary traction member to the traction member, and drawing the flexible tube from one manhole through the sewer pipe to the other manhole via the traction member;
Filling the existing sewer pipe with concrete, mortar or plaster;
Attaching a pyrotechnic to the auxiliary pulling member, pulling the auxiliary pulling member and pulling the pyrotechnic into the flexible tube;
Detonating the pyrotechnics and destroying the existing sewer pipe;
And removing the existing sewer pipe that has been excavated and destroyed from the ground surface,
In the step of detonating the pyrotechnics and destroying the existing sewer pipe, the concrete, mortar or gypsum is hardened so as to enclose innumerable fragments of the sewer pipe with surrounding soil, and the existing sewer pipe Prevents the proliferation of countless pieces of
In the step of removing the existing sewer pipe, the hardened material group hardened in a form including countless pieces of the existing sewer pipe together with surrounding soil by the concrete, mortar, or gypsum is removed. Pipe removal method. Inserting a traction member between two manholes arranged adjacent to an existing sewer pipe and the existing sewer pipe;
Attaching a flexible tube through which the auxiliary traction member is inserted to the traction member, and drawing the flexible tube from the one manhole through the existing sewer pipe to the other manhole via the traction member;
Filling the existing sewer pipe with concrete powder, gypsum powder or water-absorbing polymer and injecting and mixing water; and
Attaching a pyrotechnic to the auxiliary pulling member, pulling the auxiliary pulling member and pulling the pyrotechnic into the flexible tube;
Detonating the pyrotechnics and destroying the existing sewer pipe;
And removing the existing sewer pipe that has been excavated and destroyed from the ground surface,
In the step of detonating the pyrotechnics and destroying the existing sewer pipe, the concrete powder, gypsum powder or a mixture of water-absorbing polymer and water surrounds the countless pieces of the existing sewer pipe. Hardened in a form that is included with the soil, preventing the diffusion of countless pieces of the existing sewer pipes,
In the step of removing the existing sewer pipe, the hardened material in which the concrete powder, gypsum powder or water-absorbing polymer is hardened so as to enclose innumerable fragments of the existing sewer pipe with the surrounding soil by water mixing. Sewer pipe removal method, characterized by removing groups. Inserting a traction member between two manholes arranged adjacent to an existing sewer pipe and the existing sewer pipe;
Attaching a flexible tube through which the auxiliary traction member is inserted to the traction member, and drawing the flexible tube from the one manhole through the existing sewer pipe to the other manhole via the traction member;
Filling the existing sewer pipe with water or muddy water;
Attaching a pyrotechnic to the auxiliary pulling member, pulling the auxiliary pulling member and pulling the pyrotechnic into the flexible tube;
Detonating the pyrotechnics and destroying the existing sewer pipe;
And removing the existing sewer pipe that has been excavated and destroyed from the ground surface,
In the step of detonating the pyrotechnics and destroying the existing sewer pipe, the water or muddy water causes the impact force of the pyrotechnic explosion to act from the inside of the existing sewer pipe, It becomes a medium for efficiently crushing sewer pipes, and countless pieces of the crushed existing sewer pipes are scattered in the surrounding soil,
In the step of removing the existing sewer pipe, the countless debris of the existing sewer pipe scattered in the surrounding soil is removed.

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