JP3324513B2 - How to lay a conduit that penetrates the embankment without excavation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of laying a waterway penetrating a bank such as a river or a reservoir, and a method of updating an existing pipeline.

[0002]

2. Description of the Related Art Conventionally, there is often a need to provide a waterway for using water from a river as a service water or, conversely, for discharging water used for a river. Since it is necessary to newly excavate a water channel that crosses the embankment of the reservoir, it is a general method to perform a digging work on the embankment body to form a desired water channel. In addition, the amount of water used and the amount of drainage greatly increased, and there are many cases where existing waterways cannot meet this demand. However, the same applies to the renewal of pipelines.

[0003]

However, in recent years, it has been common practice to use the levee itself as a traffic road on the embankment, and to temporarily or temporarily cut off traffic due to the above-mentioned excavation work. Forcing a detour can be said to be in a situation that is truly insidious from current road conditions. In addition, a large amount of money is required for the diversion of this traffic and for the installation and removal of a temporary embankment to be constructed in place of the temporarily cut embankment, so this solution is strongly demanded. In order to newly install or renew waterways without cutting off the embankment, it is most preferable to apply a propulsion method in which the pipes for water flow are installed in the ground without cutting. However, in this propulsion method, the pipe is pushed into the ground from a starting pit with a hydraulic jack or the like, but since the cutting diameter of the excavating machine attached at the head is set slightly larger than the outer diameter of the pipe, Inevitably, a gap C is formed between the propelled cutting line D of the earth and sand and the outer peripheral surface of the pipe, and there is a risk that water in the embankment leaks out of the embankment through the gap. Therefore, it is considered that it is not permissible to apply the propulsion method as it is to lay in the ordinary ground unless technical solutions to eliminate this concern are involved.

That is, it must be noted that conditions different from those of general laying work are added in forming a new pipeline through the embankment. As the water level of the river or pond located on one side of the embankment rises and becomes flooded, naturally the difference from the groundwater level on the opposite side is not large, so the water pressure rises and infiltration occurs, and along the pipeline There is no denying the concern that the flow of particles in the sediment will start and cause water to infiltrate from high water levels. In order to eliminate this concern, a method of cutting the internal and external communication by driving a sheet pile is taken, but the most effective configuration has been developed in which a water barrier that traverses the pipeline is buried in the embankment. It is generally recognized as a design condition for laying a pipeline that penetrates through, and is ready to be standardized as necessary specifications.
For example, it is estimated that laying works that impose an internal standard with a minimum height and width of 1 m each occupy the mainstream as impermeable walls crossing pipelines.

[0005] In order to lay a pipeline penetrating the embankment body by applying the propulsion method, it cannot be said that the above two difficult conditions must be satisfied at the same time. In Japanese Patent No. 2627815, which the applicant himself has previously indicated, a pipe penetrating the embankment in a non-cutting manner is laid by a highly efficient propulsion method, and the formation of a water impervious wall, which is a new requirement, is completely completed. Fig. 1 shows the configuration and procedure for forming without cutting. The summary is shown in Figure 1.
As shown in FIGS. 2 (A) to 2 (D), a pipeline penetrating the embankment is formed by a propulsion method in which a propulsion pipe 105 is pushed horizontally one after another from a shaft 104 excavated in at least one of the embankments 101. After the formation, the dividing ring 106 is previously interposed in the shaft between the pipes to be located substantially at the center of the embankment, and after the pipe is formed, the dividing ring 106 is disassembled and removed. A cement slurry S containing a hardening accelerator is sprayed from the annular opening toward the entire outer periphery to replace the soil G near the outer periphery to form a dense replacement layer or an impregnated layer H. 2 shows a procedure in which the water stop plate 103 is protruded, the disassembling ring 106 is connected, the ring is returned to an annular shape, and the water ring is fitted again. This procedure solves the problem of interrupting traffic to temporarily excavate the embankment, greatly reducing incidental work before and after, and significantly reducing construction costs and construction time.

Although it is true that the prior art does not dig up the embankment and eliminates the risk of traffic obstruction, there is a new uncertain element in the implementation. The problem has not necessarily been resolved unconditionally. In recent years, when laying pipes that penetrate the embankment, it is required to set impermeable walls as a formal requirement, and the required dimensions are, for example, “1 m width or more” as specified by the Ministry of Construction's River Sabo Technical Standard. , Height 1m or more "has entered the stage of studying, but in this prior art, it is necessary to project a water impervious wall with the required size from inside the pipe,
It is not always easy depending on the pipe diameter and surrounding soil properties, and there is a high probability that it will be a constraint on implementation.

[0007] In addition, replacement of earth and sand with cement slurry by high-pressure injection from the inside of the pipeline penetrated by the propulsion method to the outer ground may be performed by disturbing the ground around the pipeline and fluidizing.
Concerns have also been pointed out that it may be weakened and adversely affected. Furthermore, the water blocking effect of the impermeable walls formed by this procedure is not necessarily reliable unless actually confirmed by a field test. It cannot be denied that applying to construction is irrational and the reliability of the water stopping effect is questionable.

In order to solve the above-mentioned problems, the present invention can substantially avoid obstacles such as traffic congestion. All dimensions can be set freely, including the necessary conditions of the impermeable wall, "both width and height are 1m or more". The water blocking function of the impermeable wall itself is completely reliable regardless of the ground. Leave no adverse effect on the embankment ground around the pipe after the pipe is formed. Safe and efficient construction conditions with mechanized processes and extremely limited manual labor. The purpose of this method is to provide a method of laying a pipeline that penetrates an embankment body without excavation to satisfy all of the above.

[0009]

According to the present invention, a method of laying a conduit which penetrates an embankment in an uncut state according to the present invention is directed from a top end 11 of the embankment 1 to a direction crossing a conduit which is to penetrate the embankment 1. The injection nozzle 21 of the high-pressure injection device 2 is screwed vertically, and a cement slurry S containing a hardening accelerator from the injection nozzle 21 tip.
The ground is cut and replaced with cement slurry while mixing and agitating to form a vertical cylinder, and the injection nozzle 21 is further perpendicular to the pipe axis of the planned pipeline from the axis of the cylinder <br>/> To form a water-blocking wall main body 3 that is formed by connecting continuous groups of cylinders that block a planned pipeline having a desired height and width, and solidify by repeating injection. From the shaft 4 excavated on at least one of the bodies 1, a propulsion pipe 5A equipped with an excavation machine 7 having a diameter slightly larger than the pipe diameter is pushed horizontally into the embankment, and then the following propulsion pipes 5B are added. When the pushing procedure is repeated and the refill in the shaft 4 reaches the propulsion pipe 5X which is to intersect with the water-blocking wall main body 3, the two annular grooves cut off the exterior surface 65 at a distance from each other. Outside of the hollow belt that is exposed to the outer surface and opened by receiving the pressing force from inside the pipe Two elastic water shield ring 61A fitted to be bulged only, and 61B, the elastic water-impervious ring 61A,
A water impervious propulsion pipe 6 having a grout inlet 62 opened in the middle of 61B is connected, and furthermore, a normal propulsion pipe 5Y is added to continue propulsion, and the excavation machine 7 hits the water impervious wall main body 3 against the impingement wall. After drilling through the through-hole 31 having a diameter slightly larger than the pipe diameter and proceeding to form a pipe penetrating the embankment body 1,
Activating the operating means 7 to activate the elastic water impermeable rings 61A, 61
B is bulged outward from the outer peripheral surface to close both ends of an annular gap C formed between the through hole 31 of the water-blocking wall main body 3 and the exterior surface 65 of the water-blocking propulsion pipe 6. The closed space is formed, and grout is press-fitted into the space from the grout inlet 62 to form the grout filling layer M over the entire circumference of the gap C.

According to the laying method of the present invention as shown in the procedure shown here, prior to the laying of the propulsion pipes, first, a number of ridges in the direction perpendicular to the intended pipeline from the tip of the levee body, that is, in the length direction of the levee body. Since the main body of the impermeable wall is made up of a series of such cylinders, the high-pressure injection device required for the installation is temporarily placed at an arbitrary location, and the actual work on the embankment is performed by drilling the tip injection nozzle like boring Just screw it in. The danger of traffic congestion is almost avoided as compared with the conventional technique of partially excavating the embankment, and if the danger remains,
As in another embodiment (FIG. 3), it is perfect if the water-blocking wall main body 3A is formed so that the injection nozzle 21 is directed obliquely downward from one corner of the bank body top end.

[0011] Before the pipe laying, the columnar body which is solidified by high-pressure injection of cement slurry by replacing it with earth and sand, and the main body of the impermeable wall, which is a continuous body thereof, are formed from the top end of the embankment body.
Since there is no limitation on the width or height, and the versatility is compatible with any specification, the essence of solving the problems of the conventional technology at once is also provided from this point.

In addition, instead of injecting high pressure from inside the pipe after laying, the tip of the spray nozzle is freely moved before laying and freely replaced with earth and sand. The difference is that it is possible to adjust the conditions freely and create a waterproof wall that guarantees the necessary and sufficient waterproofness.

The laying of the pipeline is formed by a propulsion method without cutting. An excavating machine is attached to the end of the front pipe to excavate a tunnel having a diameter slightly larger than the diameter of the pipe (for example, 10 mm), and the propulsion pipe follows the outer peripheral surface without rubbing against the surrounding soil. The biggest problem with this method is the water stoppage where the pipe runs through the water barrier wall body. Naturally, a gap C is generated between the outer peripheral surface of the propulsion pipe and the inner surface of the through hole formed in the water barrier wall body. Inevitably, the focus is on how to seal this gap.

In the prior art, a ring or the like that can be disassembled is sandwiched in advance between pipes corresponding to this part, and once disassembled and removed, grout is spouted from the opening to fill the gap and fill the gap. Needless to say, since the gap C is continuous through the embankment like the propulsion pipe, the grout to be injected flows out infinitely through the gap, and is exactly a bucket with a hole. A reliable water seal effect like drawing water cannot be expected at all.

On the other hand, in the present invention, a water impervious propulsion pipe is interposed in a pipe, and an actuating means provided in the water impervious propulsion pipe is activated to expand the elastic water impervious ring outside the outer peripheral surface of the pipe. After partitioning the gap C of the annular hollow band formed in the wall thick portion of the target impermeable wall main body and blocking it from the outside and sealing it, grout is pressed into this closed space and replaced with a dense packed layer, The above-mentioned problem of the prior art is completely solved, and the water blocking function, which is the purpose of the impermeable wall, works 100% to solve the problem. The operating means may be selected from several configurations exemplified in the embodiments described later, and a method considered to be optimal may be selected after sufficiently examining the working conditions, the expected water pressure in the pipe, and the like. Also, a method of remarkably enhancing the water blocking function of the entire pipeline can solve the problem with the aid of the present means, and enables a flexible treatment which can respond to any specification.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a longitudinal sectional front view (A) of an embodiment in which a lower half portion of a water impervious propulsion pipe 6 which is a main body in a laying method of the present invention is omitted, and a cross section taken along line AA in FIG. An arrow view (B) and a development view (C) from the B direction are shown, respectively. The water-impervious propulsion pipe 6 is formed by an exterior concrete 64 and an interior mortar lining 66 reinforced with a ductile cast iron pipe 60 and a welding wire 63, and has two elastic water-impervious rings having the same height as the exterior surface 65 of the exterior concrete 64. 61A and 61B are externally fitted at an interval, and
A grout injection port 62 is opened in the middle of the elastic waterproofing ring of the book and communicates with the inside of the pipe. A normal propulsion pipe 5 is joined to the left side of the figure (A) as a succeeding pipe, and the outer periphery of the ductile cast iron pipe 50 has the same diameter as the maximum diameter (receiving flange-not shown), like the water impervious propulsion pipe. Thus, the inner surface of the ductile cast iron pipe 50 is covered with mortar lining for the purpose of corrosion protection. Further, the rubber ring 54 is not simply interposed between the two pipes,
The rubber ring 54 is compressed by the pressing ring 53 and a pressing bolt provided behind the pressing ring 53 to increase the surface pressure of the rubber ring, thereby improving the watertightness of the joint.

FIGS. 2A to 2E are longitudinal front views showing the procedure of the laying method according to the present invention systematically and continuously.
A shaft 4 is excavated on at least one of the embankments 1 (both in the figure) to be a starting shaft, and the other is a reaching shaft. (A) The injection nozzle 21 of the high-pressure injection device 2 (the whole is not shown here) is a position on the top end 11 of the embankment body 1 where construction conditions can be tolerated in consideration of effects on traffic and the like, and The cement slurry S is sprayed vertically downward to the position where the wall is required to form the impermeable wall main body 3 which is a solidified body in which the cylindrical body is continuous, and is constructed to a required height. In addition, when the top end of the embankment is used as a road and cannot be used, as another form, the high pressure injection device 2 is operated obliquely downward as shown in FIG. Can also. (B) After forming the impermeable wall main body 3 or 3A by this method, it is cured and consolidated. (C) The propulsion pipe 5A is press-fitted from the shaft 4 toward the embankment body 1,
When the press-fitting is completed, the propulsion pipes 5B are continuously added and proceed sequentially in a horizontal direction, but when a predetermined pipe line is formed, the propulsion pipes 5 at positions corresponding to both ends in the wall thickness direction of the water-blocking wall main body 3 are formed.
After X, the impervious propulsion pipe 6 is interposed. (D) The normal propulsion pipe 5Y is connected after the water impervious propulsion pipe 6, and further propulsion is continued, and a predetermined propulsion work is completed. A gap C is formed over the entire circumference and the entire length between the outer peripheral surface of the pipe formed by joining the propulsion pipe 5 and the water impervious propulsion pipe 6 and the propulsion cutting line D (dotted line in the figure). . FIG. 4A shows the water impervious wall main body 3 in the AA cross section at this time.
FIG. 4B is a sectional view taken along line BB in FIG.

(E) In order to close both ends of the gap C between the outer peripheral surface 65 of the water impervious propulsion pipe 6 and the through hole 31 of the water impervious wall body 3,
When it reaches a predetermined position crossing the water impervious wall main body 3, the actuating means pre-installed in the water impervious pipe 6 is activated to press the elastic water impervious ring 61 attached to the outer periphery of the water impervious pipe and to be elastically deformed. Of the gap C by the swelling action.
The area separated by the two elastic water impervious rings is sealed to cut off communication with the outside world. Thereafter, a grout injection port 62 (two elastic water impervious rings 61A, 61A) provided in advance in the propulsion pipe 6 is provided.
B is placed in the middle. ), The sealed area is completely filled with grout and replaced with the grout filling layer M. The state at this point is shown in FIG. Only in this range, since the gap C is a closed space, the injected grout is completely filled without flowing out of the space, the grout filling layer M is compacted as it is, and the water stopping effect of the present invention is large. Form features.

The members and devices constituting the embodiment in each step are further supplemented. First, a specific example of the high-pressure injection device 2 is generally shown in FIG. 6, but a water tank 23, a grout mixer 24, an ultra-high-pressure pump 25,
A hydraulic grinder unit 26, a compressor 29, and a vacuum car 28 are separately provided. A jet grout machine 27 is disposed in the shaft, and contains a hardening accelerator through the inner pipe of the double transport pipe 22. While the cement slurry S is sent under pressure to the nozzle 21 at a high pressure, the soil G is sucked through the outer pipe and sent to the vacuum car 28 for replacement to form the water-blocking wall main body 3.

After the impermeable wall main body 3 is formed, a penetrating pipe is formed by a propulsion method. FIG. 7 is a vertical cross-sectional view showing a typical form of the propulsion method, in which a hydraulic pump 43, a jack base 44, and a pressing cylinder are held by a support wall 41 and a propulsion table 42 inside a starting shaft 4. -45 is installed, while a portal crane 46 for loading pipes is mounted on the shaft. At the end of the leading end of the propulsion pipe, an excavating machine (not shown) consisting of rotating blades having an operating diameter usually larger than the pipe diameter by about 10 to 15 mm is attached, and the driving force (oil pressure, air pressure, electric power) supplied from the shaft 4 is provided. ) To excavate the ground and the immobilized water barrier wall body to make a hole having an operating diameter, and to form a through hole 3 in the water barrier wall body.
1 and the propulsion pipe and the impervious propulsion pipe pass through to the other end of the embankment. The propulsion pipe 5 is carried into the shaft and is pressed into the ground horizontally by a pressing cylinder.
Since the stroke has a limit, the stroke that has been fully extended is once contracted, the strut 47 is sandwiched between the end of the stroke and the end of the stroke, and this is sequentially repeated to increase the press-fit distance.

The elastic water impermeable ring 6 attached to the water impermeable propulsion pipe 6
The operating means for bulging 1 is not particularly limited, but the operating means 7A of the embodiment according to FIGS.
More specifically, two fixing flanges 71A, 71B of the same level by cutting out the outer surface 65 of the water impervious propulsion pipe 6 will be described.
A plurality of tap holes 72 penetrating the ductile cast iron pipe 60 are bored in a band-shaped hollow portion formed between both flanges in parallel with a distance, and a push bolt 73 screwed with the tap hole 72 is formed. The distal end is in contact with a strip-shaped push plate 74 fitted into the hollow portion so as to freely advance and retreat, and is formed by placing an elastic water-blocking ring 61A (or 61B) on the push plate 74. When the push bolt 73 is rotated from the inside of the pipe and moved forward in the outer circumferential direction, the push plate 74 is pushed up by the tip thereof, the push plate 74 also moves in the outer circumferential direction in the band-shaped hollow portion, and is restrained between the two fixed flanges. The elastic water-impervious ring 61 is lifted from the bottom surface and forcibly elastically deformed, and bulges out of the outer peripheral surface, which is the remaining opening. Further, the use of a water-swellable resin or the like that swells with water for the elastic water-blocking ring further enhances the water-stopping effect.

FIG. 8 is a longitudinal sectional front view (A) of another embodiment 7B after the operation and an enlarged view (B) of a main part before the operation. Two fixed flanges 71A and 71B of a level are provided in parallel around at a distance, and a floating flange 75 is slidably fitted on the outer peripheral surface of the ductile cast iron tube 60 into a band-shaped hollow portion formed by both flanges. A case is shown in which an elastic water-blocking ring 61A (or 61B) is fitted between the fixed flange 71A and the floating flange 75, and a power jack 76 is telescopically mounted between the floating flange 75 and the other fixed flange 71B. In this case, since there is a concern that the earth and sand excavated at the time of propulsion of the water impervious propulsion pipe may penetrate into the mounting location of the power jack and damage the equipment, the power jack 76 is covered as shown in FIG. It is preferable to provide in the shape of an eaves.

As a feature of this embodiment, in order to operate the power jack 76 in a timely manner, the hydraulic hose 80 must be penetrated through the through hole 81 so as to connect it from inside the pipe, but the number of through holes is extremely small. Sufficient grout inlet 62
Since the number is only two or three places even if
In contrast to the complicated manual work of screwing the push bolts 73 individually and the required number of tap holes 72 for performing the operation, the power jack is a far more convenient mechanical operation, and the diameter of the pipe As the number becomes larger, the number of holes is also largely omitted, and the difference is further increased.

FIG. 9 is a longitudinal sectional front view (A) after operation of another embodiment 7C in place of the power jack of the above-described embodiment, and an enlarged view (B) of a main part before operation. A tap hole 77 that penetrates the floating flange 75 in a direction parallel to the pipe axis is threaded, and a push bolt 78 that is screwed into one side with the tap hole 77 and the other end of which contacts the side surface of the fixed flange 71B is turned from inside the pipe. It is configured to be movably mounted. Also in this case, the number of the through holes 81 penetrating the ductile cast iron pipe is smaller than the required number of the tapped holes 72 of the first embodiment (the operating means 7A) of FIG. And the advantage that the loss in tube strength is reduced.

FIG. 10 shows an inclined surface 79 in which the side surface of the floating flange 75 in contact with the elastic water impermeable ring 61A (or 61B) is increased in the pressing direction with respect to the operating means 7C of the embodiment.
This is an actuation means 7D to which the above-mentioned requirement is added. Although not shown, the same idea can be applied to the embodiment of FIG. The contact between the inclined side surface and the outer peripheral surface of the ring not only widens the pressure receiving surface of the external force, but also causes the external force imbalanced from the right side of the drawing to act as a wedge to leave the elastic body. Since the water is concentrated in the direction in which it is to be pushed out of the tube from the opening, the swelling action of the elastic water-blocking ring is further enhanced, and the enhanced closing action leads to a specific effect that is more efficient.

FIG. 11 is an overall view (A) showing another embodiment of the present invention and an enlarged view (B) of a main part. In this embodiment, ordinary propulsion pipes 5A, 5B, 5C are provided in a pipeline. ... and the impervious propulsion pipes 6A, 6B, 6C ... are alternately combined and joined, and not only where the pipeline crosses the impervious wall body 3 but also
It is a special specification that strengthens the water blocking function over the entire length. It is an unparalleled and meaningful way to form pipes that are perfect for water retention and transmission, based on complex practical conditions such as water pressure in pipes, earth pressure that presses on dikes.

[0027]

As described above, in the method of laying a pipe penetrating the embankment according to the present invention, neither the laying of the pipe itself nor the formation of a water impervious wall required as a unique design requirement of the embankment are all performed. Since the excavation is performed, the best effect appears that there is no fear of causing traffic congestion without excavating the top of the embankment, which is normally used as a road.

At the same time, it goes without saying that it is a flexible construction method that can meet the requirements of any specifications, not to mention the lower limit of the width and height, which are the necessary requirements of the impermeable wall. This is an irreplaceable advantage. Unlike the prior art (FIG. 12) described above, the reliability of assuring a reliable water stopping function is further improved without being influenced by the ground of the embankment body, and has no adverse effect on the embankment ground. The effect of performing safe and high-productivity laying work by making full use of mechanized and automated equipment greatly exceeds any conventional technology.

The contents of the construction, the level of the impermeable function to be configured, the strength of the pipe, and the like can be set freely according to various conditions such as the diameter of the pipe, the strength of the ground, and the difference in the pressure inside the pipe. And the ability to realize a high level of water-blocking function that was not previously expected over the entire length of the pipeline is evaluated as an effect that surpasses all conventional technologies.

[Brief description of the drawings]

FIG. 1 is a partially longitudinal front view (A) of an embodiment of a water impervious propulsion tube used in the present invention, a cross-sectional view taken along line AA in FIG. (C).

FIG. 2 is a longitudinal sectional front view showing an embodiment of the method of the present invention in the order of steps with reference to FIGS.

FIG. 3 is a longitudinal sectional front view showing another embodiment of the present invention.

4 (A) is a sectional view taken along the line AA in FIG. 2 (D) and FIG. 4 (B) is a sectional view taken along the line BB in FIG. 4 (A).

FIG. 5 is a longitudinal sectional front view after operation in the embodiment of FIG. 1;

FIG. 6 is a layout view showing an example of a high-pressure injection device.

FIG. 7 is a layout view showing an example of a propulsion method device.

FIG. 8 is a longitudinal sectional front view (A) after operation of another embodiment and an enlarged view (B) of a main part before operation.

FIG. 9 is a longitudinal sectional front view (A) after operation of another embodiment and an enlarged view (B) of a main part before operation.

FIG. 10 is a longitudinal sectional front view (A) after operation and an enlarged view (B) of a main part before operation according to still another embodiment.

11 is an overall sectional front view (A) and an enlarged view (B) of a main part showing a special embodiment in which the function of the entire pipeline is enhanced according to the present invention.

12 (A) to 12 (D) are longitudinal sectional front views showing process steps of an embodiment of the prior art.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Embankment 2 High-pressure injection device 3 Main body of impermeable wall 4 Vertical shaft 5 Propulsion pipe 6 Impermeable propulsion pipe 7 Drilling machine 11 Top end 21 Injection nozzle 31 Through hole 61 Elastic impermeable ring 62 Grout inlet 64 Exterior concrete 65 Exterior surface 71 Fixed flange 72 Tap hole 73 Push bolt 74 Push plate 75 Floating flange 76 Power jack 77 Tap hole 78 Push bolt 79 Inclined surface S Cement slurry C Gap (annular gap created between the outer peripheral surface of the pipeline and the propulsion cutting line) M Grout packed bed D Propulsion cutting line

Continuation of front page (72) Inventor Keisuke Takagi 1-12-19 Kitahorie, Nishi-ku, Osaka-shi, Osaka Inside Kurimoto Ironworks Co., Ltd. (56) References JP-A-4-146398 (JP, A) JP-A-4 -155006 (JP, A) JP-A-4-76197 (JP, A) JP-A-4-353190 (JP, A) Japanese Utility Model Application No. Sho 61-116899 (JP, U) Japanese Utility Model Application No. Sho 55-17857 (JP, U) ) Patent 3233346 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) E21D 9/06 311 E02B 3/10 E02B 3/04 E02B 3/14 E02D 3/12 101

Claims (8)

(57) [Claims] In a method of laying a pipe penetrating a bank such as a river or a reservoir, high-pressure injection is performed vertically from a top end 11 of the bank 1 in a direction crossing a pipe intended to penetrate the bank 1. The injection nozzle 21 of the device 2 is screwed in, and a cement slurry S containing a hardening accelerator is injected from the tip of the injection nozzle 21 to cut the ground and replace with the cement slurry while mixing and stirring to form a vertical cylinder. Further, the injection nozzle 21 is moved from the axis of the cylindrical body in a direction orthogonal to the pipe axis of the predetermined pipeline, and the injection is repeated to solidify and cut off the predetermined pipeline having a desired height and width. After forming the impermeable wall main body 3 which is formed by connecting continuous groups of continuous cylinders, the excavation machine 7 having a diameter slightly larger than the pipe diameter from the shaft 4 excavated in at least one of the embankments 1.
Is pushed horizontally into the embankment, and then the following propulsion pipes 5B... Are added and pushed in again. When it reaches the propulsion pipe 5X, the exterior surface 65 is exposed to the outer surface into two annular hollow bands cut away in a concave groove shape at a distance, and outwardly opened by receiving the pressing force from the inside of the tube. Only two elastic water impermeable rings 61A and 61B fitted so as to be swellable only, and the elastic water impermeable rings 61A and 61B.
Is connected to a water impervious propulsion pipe 6 provided with a grout injection port 62 opened in the middle of the pipe, and further continued by adding a normal propulsion pipe 5Y to the water impervious wall body 3 hit by the excavating machine 7. After passing through the through hole 31 having a diameter slightly larger than the pipe diameter and moving forward to form a pipe penetrating the embankment body 1, the actuating means 7A is activated to move the elastic water-blocking rings 61A and 61B from the outer peripheral surface. The space is bulged outward to form a closed space that partitions near both ends of an annular gap C formed between the through hole 31 of the water-blocking wall main body 3 and the exterior surface 65 of the water-blocking propulsion pipe 6. A method of laying a pipe that penetrates an embankment without cutting, characterized in that grout is injected into the inside of the grout from a grout injection port 62 to form a grout filling layer M over the entire circumference of the gap C. 2. The method according to claim 1, wherein the height and width of the impermeable wall main body 3 are set to arbitrary dimensions of at least 1 m or more. 3. The impermeable wall main body 3 according to claim 1, wherein
A laying a pipeline that penetrates the embankment without cutting, characterized in that A does not intersect perpendicularly with the planned pipeline but intersects obliquely downward from one corner of the top end 11 of the embankment 1. Method. 4. The fixing means according to claim 1, wherein the operating means 7A of the two elastic water-impervious rings 61 are respectively cut out of the outer surface 65 of the water-impervious propulsion pipe 6 and are fixed at the same level. The flanges 71A and 71B are fixed in parallel at a distance from each other, and a plurality of tap holes 72 penetrating the ductile cast iron pipe 60 are formed in an annular hollow band formed between the two flanges. The tip of the bolt 73 comes into contact with a strip-shaped push plate 74 fitted into the hollow belt so as to be able to advance and retreat, and the elastic water-blocking ring 61 is mounted on the push plate 74 to form a non-cutting cut. A method of laying a pipeline that penetrates the embankment. 5. The outer surface 6 of the water-impervious propulsion tube 6 according to claim 1, wherein the operating means 7B of the elastic water-impervious ring is provided.
5 and two fixed flanges 71 of the same level
A and 71B are laid in parallel at a distance from each other, and a floating flange 75 is slidably fitted on an outer peripheral surface of the ductile cast iron pipe 60 into an annular hollow band formed by both flanges, and one of the fixed flange 71A and the floating flange 75 is slidably fitted. An elastic water-blocking ring 61 is fitted between the movable flanges 75, and a power jack 76 is stretchably mounted between the floating flange 75 and the other fixed flange 71B. How to lay. 6. A tap hole 77 penetrating in a direction parallel to the pipe axis in the floating flange 75 in place of the power jack, and the other end is fixed while being screwed into one side with the tap hole 77. Push bolt 7 that contacts flange 71B
8. A method of laying a pipe line that penetrates an embankment body without cutting, characterized in that the actuating means 7C is formed by rotatably mounting the pipe 8 from inside the pipe. 7. The actuating means according to claim 5, wherein the floating flange 75 has a side surface in contact with the elastic water impervious ring 61 formed by an inclined surface 79 increasing in thickness in the pressing direction, and the pressing force is enhanced by the wedge action. A method of laying a conduit that penetrates an embankment body without cutting, characterized by 7D. 8. The water impervious pipe according to claim 1, wherein the water impervious propulsion pipe is not limited to a crossing point intersecting with the water impervious wall main body 3 but also to an arbitrary point between ordinary propulsion pipes. A gap between the exterior surface 51 of the propulsion pipe 5 and the cutting line D for propulsion is partially filled by appropriately interposing a propulsion pipe to enhance the water-blocking function of the entire pipe line. A method of laying a pipeline that penetrates the embankment by excavation.