KR101368999B1 - Pipe propulsion apparatus enabling reinforcement of laying hole of pipe and pipe constructing method using this - Google Patents

Abstract

The present invention relates to a conduit propulsion device capable of reinforcement of conduit buried holes, and prevents the collapse of the ground even if cracks are generated in the conduit buried holes by the impact applied from the bit when the pipe is buried while laying the ground by the unshielded method. For the purpose of
A conduit propulsion apparatus capable of reinforcing conduit buried holes according to the present invention includes: a leading pipe 10 to which a buried pipe 300 buried in the ground is connected; A propulsion head 20 coupled to the front of the lead pipe and receiving power to rotate the ground to form a conduit buried hole 1; A screw 30 mounted inside the lead pipe and connected to the rear of the propulsion head and discharging the slime excavated by the propulsion head to the outside; A packer 40 installed at the periphery of the propulsion head and expanding through the injection of fluid to be supported by the inner wall surface of the conduit buried hole to form a closed chamber at the periphery of the propulsion head; It is configured to include a grout injection means 50 for reinforcing by lining the wall surface of the conduit buried hole by injecting the grout material into the chamber formed by the packer.

Description

PIPE PROPULSION APPARATUS ENABLING REINFORCEMENT OF LAYING HOLE OF PIPE AND PIPE CONSTRUCTING METHOD USING THIS}

The present invention relates to a conduit propulsion device capable of reinforcement of conduit buried hole and a conduit construction method using the same, and more particularly, when the conduit such as sewage pipes are buried underground, cracks occur in underground conduit buried holes or Due to the vulnerable to the conduit buried hole relates to a conduit propulsion device capable of reinforcement of the conduit buried hole that can reinforce the conduit buried hole without drawing the propulsion device in the ground and the construction method using the same.

In general, when laying various pipes such as water pipes, gas pipes, communication pipes, and oil pipes in the basement, the pipes are buried by excavating the ground according to the depth of the pipes. If the excavation with the ground open to be buried underground causes a lot of obstacles in traffic, and because the excavated soil must be piled up at the construction site, the accumulated soil occupies the road. In addition, the excavated soil is scattered in all directions around the construction site, and when there is water in the excavated soil, the muddy water flows to the road and contaminates the construction area. There is a problem that the train will not be able to pass during the construction period.

Also, even if the ground is excavated, the pipe is buried, and the ground is backfilled with the excavated soil, and then compacted, the ground cannot be firmly ground to the ground state before the excavation. The ground at the point where the pipe is buried will cause a variety of problems.

In addition, the ground excavation method as described above has a lot of manpower and time, there is an uneconomical problem that not only increases the construction period but also costs a lot of construction costs.

In the prior art, as a solution to the above problems of the ground excavation method, a method of digging a work hole on both sides of a road and then horizontally type a pipe in the work hole and a method of hydraulically pushing the bar are proposed. have.

However, the former tube type is a method of pressing a steel pipe with a hammer or the like, and has been applied to type a relatively small diameter steel pipe in soft ground such as clay material with weak coking force, but the type direction of the steel pipe depends on the hammering direction. Due to the phenomenon that the tube being typed is oriented in a weak direction of the ground (reaction force), the tube is not typed straight in the direction it is to be buried, but it is typed in a crooked direction. In the construction site that is buried in the construction site, the pipe hammering method is avoided, and as the diameter is larger, the size and weight of the hammer must be large accordingly. have.

The latter tube press-fit method pushes the pipe forward with a hydraulic cylinder and presses it into a relatively large diameter (approx. 600mm or more) on the ground with weak coking force. Not only did not press precisely into the bed, but also it was very difficult and time-consuming because the press-in of the steel pipe was very slow and the worker had to go into the steel pipe while laying down and carry out the clay work to discharge the soil flowing into the steel pipe. It was pointed out that the construction cost is high and the air becomes longer because it takes a lot of time and manpower to dispose of the soil.

Another conventional technique is a semi-shelled process, in which water is pushed into the tube while rotating the bit at the tip of the tube to push out the soil.

According to the conventional semi-shielding method, since it is possible to only drill the conduit buried hole, there is a problem in that the conduit buried hole is collapsed due to the punching impact due to the bit. As such, when the burial burial collapses, the beet and the pipe are buried in the ground. When the beet and the pipe buried in the ground are pulled out of the ground, the ground collapse may spread, and thus there is a problem that the accident is not easily drawn. Particularly in the case of soft ground, the ground collapse is so severe that the conduit cannot be constructed in the shortest distance, but the construction is bypassed along the solid ground.

The present invention is to solve the problems as described above, even if the crack is generated in the conduit buried hole by the impact applied from the bit when the pipe is buried in the semi-shield method to bury the ground can prevent the collapse of the ground The purpose of the present invention is to provide a conduit propulsion device capable of reinforcing conduit buried construction and a conduit construction method using the same.

Another object of the present invention is to ensure that the conduit buried hole is not collapsed by the impact applied from the propulsion bit when gulting through the propulsion bit.

A conduit propulsion apparatus capable of reinforcement of a conduit buried hole according to the present invention for achieving the above object includes: a leading pipe to which a buried pipe buried in the ground is connected; A propulsion head coupled to the front of the lead pipe, the propulsion head forming a conduit buried hole by receiving power and rotating to crush the ground; A screw mounted to the inside of the lead pipe and connected to the rear of the propulsion head and discharging the slime excavated by the propulsion head to the outside; A packer installed at the periphery of the propulsion head and expanding through the injection of fluid to be supported by the inner wall of the conduit buried hole to form a closed chamber at the periphery of the propulsion head; It is characterized in that it comprises a grout injection means for reinforcing by lining the wall surface of the conduit buried hole by injecting a grout material into the chamber formed by the packer.

According to the conduit propulsion device capable of reinforcing conduit buried holes according to the present invention and the conduit construction method using the same, when a crack or the like occurs in a conduit buried hole due to an impact applied from a propulsion head, a propulsion device and a sewer pipe already buried are used. It is possible to reinforce conduit buried holes by constructing liners by grouting in the ground without drawing them to the ground, thus preventing the burial and ground collapse of propulsion devices and conduits due to the collapse of conduit buried holes.

And, when the excavation using the propulsion head lining the inside of the conduit buried hole can be prevented from collapsing due to the propulsion head.

Therefore, by reinforcing the conduit buried hole with grout with construction of the conduit buried hole can prevent the loss due to the buried propulsion device and the conduit can shorten the air for laying the conduit.

1 is a side view of the installation state of the conduit propulsion apparatus capable of reinforcement of the conduit buried hole according to the first embodiment of the present invention.
Figure 2 is an excerpt perspective view of the main portion of the conduit propulsion apparatus capable of reinforcing the conduit buried hole according to the first embodiment of the present invention.
3 is an enlarged view of a packer applied to a conduit propulsion apparatus capable of reinforcement of a conduit buried hole according to the first embodiment of the present invention.
Figure 4a and Figure 4b is an illustration of a packer applied to the conduit propulsion apparatus capable of reinforcement of the conduit buried hole according to the first embodiment of the present invention, respectively.
5 is an enlarged view of a propulsion head and a screw for showing a grout supply passage and a grout injection passage applied to a conduit propulsion apparatus capable of reinforcing a conduit buried hole according to Example 1 of the present invention.
6a to 6d is a conduit buried process diagram using a conduit propulsion apparatus capable of reinforcing conduit buried holes according to the first embodiment of the present invention.
7 is a view showing a liner formed during the conduit buried process using a conduit propulsion apparatus capable of reinforcement of the conduit buried hole.
8 is an installation state of the grouting spray gun applied to the conduit propulsion apparatus capable of reinforcing the conduit buried hole according to the second embodiment of the present invention.
Figure 9 is an angle adjustment state of the grouting spray gun applied to the conduit propulsion apparatus capable of reinforcement of the conduit buried hole according to the second embodiment of the present invention.
Figure 10 is a stretched state of the grouting spray gun applied to the conduit propulsion apparatus capable of reinforcement of the conduit buried hole according to the second embodiment of the present invention.

≪ Example 1 >

1 and 2, the conduit propulsion apparatus 100 capable of reinforcement of a conduit buried hole according to the present invention includes: a lead pipe 10; A propulsion head 20 mounted to the front end of the lead pipe; Screw 30 and the grout injection means 50 for grouting the wall surface of the conduit buried hole (1) formed by the propulsion head 20, the screw 30 to discharge the slime excavated by the propulsion head 20 to the outside It is composed of

Since the present embodiment aims to grout and reinforce the wall surface of the conduit buried hole 1, the packer 40 and the grout injection means 50 related thereto will be described in detail.

As shown in FIGS. 1 to 3, the packer 40 is a bag in which fluid (air, milk, etc.) is injected and expanded therein, and a circumference of the propulsion head 20 (specifically, the head of the propulsion head 20). The tube 21 is mounted along the circumferential direction to correspond to the inner wall surface of the conduit buried hole 1.

The packer 40 may form a closed chamber for grouting, and the first and second packing parts 41 and 42 are provided for this purpose. The first and second packing parts 41 and 42 may be arranged as a single piece at regular intervals along the front and rear directions, or may be connected to each other through a connection part 43 coupled to the circumference of the pushing head 20. The first and second packing parts 41 and 42 and the connection part 43 are separated from each other through the diaphragm.

The first and second packing parts 41 and 42 may be expanded by, for example, air injected through the air injection means.

In the air injection means, two first and second distribution pipes 45 and 46 are distributed to one injection pipe 44, respectively, and the first and second distribution pipes 45 and 46 are first and second packing parts, respectively. Inject air into (41, 42). That is, the first and second packing parts 41 and 42 expand as shown in FIG. 3 to form a closed room therebetween, and grout material is injected into the closed room.

Packer 40 of such a configuration may be one cylindrical, as shown in Figure 4a, as shown in Figure 4b, a plurality of arc-shaped may be arranged along the circumferential direction. Irrespective of the structure of the packer 40, the injection pipe 54 of the grout injection means 50, which will be described later, is configured to correspond to the closed chamber between the first and second packing parts 41 and 42. As shown in FIG. 4B, the packers 40 are separated from each other in the case of the packers 40 formed in a plurality of arc shapes, but there is a gap in which the grout material may leak due to the expansion of the first and second packing parts 41 and 42. It does not occur.

The packer 40 is in contact with the grout material, and at this time, the surface is treated to smoothly pass without damage such as being torn by friction with the grout material when the propulsion apparatus 100 is advanced (for example, reinforcement or Coated with a material that induces slip.

As shown in Figure 1, the grout injection means 50, for example, a tank 51 (a stirrer may be applied to prevent the hardening of the grout material) is stored in the grout material, pumping the grout material stored in the tank 51 The chamber 52 between the first and second packing parts 41 and 42 for the pump 52, the flow meter 53 for detecting the amount of grout material supplied by the pump 52, and the grout material supplied by the pump 52. It is composed of an injection tube 54 to be injected into.

Through the packer 40 and the grout injection means 50, by lining the weak part of the conduit buried hole 1 into the grout, it is possible to prevent the collapse of the conduit buried hole 1. After the lining is finished, the fluid injected into the first and second packing parts 41 and 42 is discharged so that the first and second packing parts 41 and 42 do not cause interference during the propulsion of the conduit propulsion device 100 and the conduit. The first and second packing parts 41 and 42 are contracted as in the beginning.

delete

This embodiment is configured to be able to grind the proximal end of the propulsion head 20, ie the portion excavated by the bit 23.

For this purpose, for example, the grout supply passage 31 is formed inside the screw 30, and at least one grout injection passage 24 is formed in the bit body 22 to communicate with the grout supply passage 31. The grout injection path 24 is formed to be inclined so as to spray the grout material supplied along the grout supply path 31 to the front circumference of the bit 22, and a plurality of the grout injection paths may be radially formed.

The grout supply passage 31 is used in connection with the pump 52 or the injection tube 54 of the grout injection means 50 described above.

The propulsion head 20 is, for example, a head tube 21 that is piped to the tip end of the lead pipe 10, a bit body 22 inserted into the head tube 21, and a head in front of the bit body 22. It is formed to protrude toward the front of the tube 21 and is composed of a bit 23 to excavate the ground. The bit body 22 is connected to the screw 30 and rotates with the screw 30, the head tube 21 is fixed to the lead pipe (10).

Hereinafter, the bit filed by the present applicant will be described as an example. As shown in FIG. 2, the bit 23 includes the center bit 23a and the center bit 23a formed at the front center of the bit body 23. The outer periphery of the first disc cut 23b formed on both sides and the bit body 22 on both sides (the direction orthogonal to the first disc cut 23b) is smaller than the periphery of the bit body 22. A plurality of through bits 23d mounted on the circumferential surface of the pair of second disc cuts 23c and the bit body 22 mounted to protrude so that their outer circumferential surface is flush with the outer circumference of the second disc cut 23c. It is configured to include). That is, the center bit 23a, the first disc cut 23b, the second disc cut 23c, and the through bit 23d are excavated while drawing concentric circles to excavate the conduit buried hole 1.

The conduit embedding method using the conduit propulsion apparatus that can reinforce the conduit buried hole according to the present embodiment is as follows.

(S10) Propulsion setting.

Secure the propulsion space at the start position and the end position for embedding the conduit (buried pipe 300), and sets the propulsion device 100 and the propulsion jack 200 of the present invention at the start position (see Fig. 6a). . The present invention can reinforce the conduit buried hole by constructing the liner by grouting in the ground without drawing the propulsion device and the sewer pipe already buried to the ground when cracks, etc. occur in the conduit buried hole by the impact from the propulsion head, etc. Therefore, it is characterized in that the propulsion device due to the collapse of the burial buried hole and the burial and ground collapse of the conduit can be prevented and thus other configurations are applied in the same manner as the known, that is, the propulsion device 100 of the present invention is known It is used with the propulsion jack 200 of the present invention can be practiced by those skilled in the art even if the detailed description is omitted.

(S20) Gulto.

By transmitting the rotational force to the propulsion device 100 and by advancing and pushing the propulsion device 100 through the propulsion force of the propulsion jack 200 to form a conduit buried hole (1) in the ground (see Fig. 6b).

(S30) buried pipe connection.

When the lead pipe 10 is excavated in the ground, the propulsion jack 200 is retracted to connect the buried pipe 300 (the screw 30 may be in a built-in state) to the lead pipe 10 (see FIG. 6C). .

(S40) buried buried.

By repeating the above-described steps (S20)-(S30), the leading pipe 10 is pushed to the end point of the buried pipe secured in the step (S10), and the buried pipe 300 is buried in the ground, and the propulsion device 100 is It is recovered by lifting to the ground (see Fig. 6d).

Since such a process is made in the same manner as the existing conduit propulsion method, a detailed description thereof has been omitted, and hereinafter, a novel action according to the present embodiment will be described in detail.

When the buried pipe 300 searches for the conduit buried hole 1 during the preliminary exploration or promotion of the ground in which the buried pipe 300 is buried, and a weakness is found in the pipe buried hole 1 as a result of the search, for example, drilling of the propulsion head 20 is performed. When the weak part is found to be fragile such that the wall of the conduit buried hole 1 is cracked, the gap between the first and second packing parts 41 and 42 of the packer 40 corresponds to the weak part (grotting position). Subsequently, the first and second packing parts 41 and 42 are inflated by injecting air into the first and second packing parts 41 and 42 of the packer 40 to expand the first and second packing parts 41 and 42. To be in close contact with the wall surface of the buried hole (1). In this case, a closed chamber is formed between the periphery of the head tube 21 of the propulsion head 20, between the first and second packing parts 41 and 42 and between the wall surface of the conduit buried hole 1. When the grout material is injected through the grout injection means 50, the grout material is injected into the chamber through the injection pipe 54. The grout material is hardened within a short time as a fastener used in the past, lining the wall surface of the pipe buried hole (1).

When the grout material is hardened, the air injected into the first and second packing parts 41 and 42 is drawn out, so that the first and second packing parts 41 and 42 are contracted and spaced apart from the wall surface of the conduit buried hole 1. . Therefore, as shown in FIG. 7, the liner L by grouting is formed on the wall surface of the conduit buried hole 1. As the first and second packing parts 41 and 42 are contracted, the interference by the liner L does not occur, and thus the driving is continued while advancing the propulsion device 100.

In this way, while drilling the ground reinforces the conduit buried hole (1) weakened by the excavation of the propulsion head 20 by grouting.

On the other hand, when drilling the ground through the bit 22 of the propulsion head 20, if it is determined that the ground is weak to form a liner by the grouting on the periphery of the propulsion head 20, as follows.

The grout material is supplied to the grout injection path 24 of the propulsion head 20 via the grout supply path 31 inside the screw 30 to the wall surface of the conduit buried hole 1 excavated by the propulsion head 20. Is sprayed is injected between the circumference of the propulsion head 20 and the wall surface of the conduit buried hole (1) to form a liner.

That is, the excavation and grouting by the propulsion head 20 are simultaneously performed, and even though the wall surface of the conduit buried hole 1 is cracked or weakened by the propulsion head 20, the conduit buried hole 1 is formed by the liner by grouting. As it becomes solid, the collapse of the conduit buried hole 1 does not occur.

<Example 2>

As shown in FIG. 8, the conduit propulsion device 100 capable of reinforcing conduit buried holes according to the present embodiment is installed at the periphery of the propulsion head 20 and is supplied with grout material by the propulsion head 20. Grouting spray gun 60 for spraying on the wall surface of the conduit buried hole (1) is included.

The grouting spray gun 60 may be installed at an angle adjustable portion of the propulsion head 20 through the angle adjusting means. The angle adjusting means may be, for example, a cylinder 70 (hydraulic, pneumatic, etc.) inserted into the propulsion head 20 and to which the rod 71 is connected to the grouting injection gun 60. Here, the grouting spray gun 60 is connected to the propulsion head 20 through the rear end hinge (62). That is, the grouting gun 60 is in close contact with the periphery of the propulsion head 20 so that the grouting gun 60 does not interfere with the wall of the conduit buried hole 1 when the propulsion head 20 is moved forward, The nozzle of 60 is angled so as to face the wall surface of the conduit buried hole 1 (see FIG. 9).

As shown in FIG. 10, the grouting injection gun 60 may be formed by having a plurality of injection pipes 60a, 60b and 60c of different diameters (shown as three in the drawing) elastically connected. The plurality of injection pipes (60a, 60b, 60c) is stretched by the grouting pressure so that the injection port of the smallest diameter injection pipe (60c) is close to the wall surface of the conduit buried hole (1), and the plurality of injection pipes (60a, 60b, 60c) overlap the original state at the end of grouting Injection pipes (60a, 60b, 60c) may be connected through an elastic member.

The grouting spray gun 60 may be installed in place of the packer 40 at the packer 40 position of the first embodiment, and may be installed between the first and second packing parts 41 and 42 of the packer 40. Alternatively, the packer 40 may be installed together with the packer 40 at one or more sides of the front and rear of the packer 40.

1: pipe laying, 10: leading pipe
20: propulsion head, 24: grout injection furnace
30: screw, 31: grout supply passage
40: packer, 41, 42: packing part
50: grout injection means, 54: injection tube
60: grouting spray gun,

Claims (8)

A leading pipe 10 to which the buried pipe 300 buried in the ground is connected;
A propulsion head 20 coupled to the front of the lead pipe and receiving power to rotate the ground to form a conduit buried hole 1;
A screw 30 mounted inside the lead pipe and connected to the rear of the propulsion head and discharging the slime excavated by the propulsion head to the outside;
A packer 40 installed at the periphery of the propulsion head and expanding through the injection of fluid to be supported by the inner wall surface of the conduit buried hole to form a closed chamber at the periphery of the propulsion head;
And a grout injection means (50) for reinforcing by lining the wall surface of the conduit buried hole by injecting the grout material into the chamber formed by the packer,
The packers are spaced apart at regular intervals along the front and rear portions of the propulsion head, the first and second packing parts to expand through the air injected by the air injection means to support the wall surface of the conduit buried hole to form a closed room (41, 42), wherein the air injection means is branched from one of the injection tube 44 and the injection tube 44 receives the air to inject air into the first and second packing portion respectively 1, 2 division pipes (45, 46),
The grout injection means is a tank 51 in which the grout material is stored, a pump 52 for pumping the grout material stored in the tank, and the grout material supplied by the pump to the first and second packing parts 41 and 42. A conduit propulsion apparatus capable of reinforcement of a conduit buried hole, characterized in that the injection pipe 54 is injected into the chamber between.
delete delete delete delete The grout supply passage 31 which is formed through the screw and supplies the grout material, is formed toward the circumference while communicating with the grout supply passage in the propulsion head and is supplied to the grout supply passage. A conduit propulsion device capable of reinforcing conduit buried holes, characterized in that it comprises a grout injection passage (24) for injecting grout material into the circumference of the propulsion head. The propulsion space is secured at the start position and the end position for the embedding of the buried pipe 300, respectively, and the propulsion device 100 and the well-known propulsion jack 200 of claim 1 are respectively inserted in the start position, and in a known method. Connecting and setting the first step;
A second step of forming a conduit buried hole (1) in the ground by transmitting the rotational force to the propulsion device (100) and driving the propulsion device (100) through the propulsion force of the propulsion jack (200);
And a third step of buried in the conduit buried hole while jointly connecting a plurality of buried pipes 300 to the rear of the lead pipe of the propulsion device,
In the second step, by expanding the first and second packing portion (41, 42) of the packer of the propulsion device between the first and second packing portion, the circumference of the propulsion device and the conduit buried hole And forming a liner on the wall surface of the conduit buried hole by injecting grout material into the closed chamber. delete

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