JPH0814236B2 - Pipe modification device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an existing pipeline in which a large number of buried pipelines are connected in series in the ground, and the buried pipeline in the pipeline is bent outside the planned pipeline. In this case, it is possible to promote and bury the pipe body on a predetermined planned pipeline while correcting the bent portion of the buried pipeline of this existing pipeline.
It is about the table .

[0002]

2. Description of the Related Art In an existing pipeline, when buried pipes are bent and connected to each other and deviate from a planned pipeline, it is necessary to correct the bent portion so as to be located in a predetermined planned pipeline. In this case, conventionally, a method of exposing the bent portion of the pipeline from the ground by an excavation method, correcting the position, and then backfilling is carried out, but in the excavation method, it takes a great deal of time and work. Not only is it longer, but there are cases where construction cannot be performed due to traffic restrictions or the presence of buildings on the ground.

Therefore, a starting shaft and a reaching shaft are excavated at both ends of an existing pipeline having a bent portion, and a pipe body to be laid is connected from the starting shaft side to the rear end of the buried pipe of the existing pipeline. When the pipe body is pushed forward and the buried pipe at the forefront part of the existing pipeline is pushed into the reaching shaft, and this work is repeated until the pipe body reaches the bending connection part of the buried pipe, A method has been developed in which a chemical solution is injected into the ground to solidify the ground, and then a part of the pipe is destroyed to overburden the ground, and then the pipe body is pushed along a predetermined planned pipeline.

[0004]

However, according to such a method for correcting a bent portion of a conduit, when the bent portion of the conduit to be corrected is reached, the propulsion of the tubular body is temporarily stopped and the manual operation is manually performed. There is a problem that the injection process of the chemical solution and the plumbing work of the buried pipe have to be performed, the construction cost is high, the work efficiency is poor, the construction period is long, and the manual work is dangerous. . It is an object of the present invention to provide a conduit correction device that can completely eliminate such problems.

[0005]

In order to achieve the above-mentioned object, the conduit correcting device of the present invention is connected to the rear end of an existing buried pipe.
The front torso part to be contacted with the front torso part so as to be eccentrically movable in the radial direction
The continuous intermediate body and the front end are radial with respect to this intermediate body.
Eccentrically and movably connected to the rear end of the pipe to be laid.
It has a rear body part, and an axial center member at the center of the front body part.
Fix the front end of the
It was installed in the inner part and attached to the outer peripheral surface of the rear end at multiple points.
Rear part of the front body and middle body with rear modification jack
On the other hand, it is eccentrically movable in the radial direction.

Further, the intermediate body is separated from the front body and the rear body.
Eccentric movement in the radial direction with a correction jack
Together, on the front end side of this intermediate body part, the front of the outer peripheral part of the intermediate body part
Those having a structure formed by providing the inlet of the drilling means and said drilling soil of the ground.

[0007]

[Operation] In the starting shaft, when the pipes to be laid are sequentially connected in series to the rear end of the existing buried pipe through the conduit correction device and pushed forward, the existing buried pipe is pushed out toward the reaching shaft and is removed. To be done. When the pipeline correction device reaches the bent portion of the existing buried pipe that is removed from the planned pipeline, the intermediate trunk is eccentric to the planned pipeline side with respect to the front trunk of the pipeline repair device that follows the existing buried pipe. To move.

At the time of movement in this correction direction, the front of the intermediate body
Excavating the ground in front of it by excavation means arranged on the end side
Then, the excavated sediment is discharged through the sediment intake. In this way, when the intermediate trunk portion of the pipeline correction device is corrected and moved onto the planned pipeline and the ground on the front side is moved forward while excavating by the excavation means provided in the intermediate trunk portion , Torso
Since the rear trunk that moves forward integrally with reaches the excavation mark,
After this, while moving the body part eccentrically toward the excavation mark,
Subsequent pipes will be laid on the planned pipeline.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, referring to the drawings, an embodiment of the present invention will be described. FIG. 1 shows a conduit correction device having an outer circumference equal to the outer diameter of an existing buried pipe A and a pipe B to be laid. It has a front body part 1 having a diameter, an intermediate body part 2 and a rear body part 3, and these body parts 1 to 3 are formed in a double short tube shape. Further, a shaft center member 4 having a quadrangular cross section is disposed from the center of the front body part 1 to the center of the rear body part 3, and the front end part four side outer peripheral surface of the shaft center member 4 and the front body part 1 are arranged. A support member 5 is connected and fixed between the inner pipes 1b, and the shaft center member 4 is fixed to the center of the front body portion 1.

At the outer peripheral end of the annular front end wall 1c of the front body portion 1, a thin cover plate 6 for covering the outer peripheral surface of the rear end of the existing buried pipe A is projected. The intermediate body portion 2 is arranged between the annular rear end wall 1d of the front body portion 1 and a fixed disk 7 having a diameter smaller than that of the body portion fixed to the rear outer peripheral surface of the shaft center member 4, and Inner peripheral portion of the annular rear end wall 1d of the body portion 1 and the fixed disc 7
The fixed cylindrical member 8 having a small diameter is integrally fixed between the opposing surfaces of the fixed cylindrical member 8 and the fixed cylindrical member 8 at several locations (two locations in the diametrical direction in the figure, but it is desirable to dispose in four directions). While integrally connecting the inner end of the correction jack 9 to
The outer ends of these jacks 9 are integrally connected to the intermediate body portion 2 so that the operation of the jacks 9 allows the intermediate body portion 2 to be eccentrically moved in the radial direction with respect to the front body portion 1 and the rear body portion 3 . I have to.

On the annular front end wall 2c of the intermediate body portion 2, a plurality of pressure water jet nozzles 10, 10, ... Are arranged in the circumferential direction with a small interval, and are opened forward. The base end of each of these injection nozzles 10 is connected to and communicates with the ring-shaped pipe 11 arranged in the intermediate barrel portion 2, and the ring-shaped pipe 11 is inserted into the fixed cylindrical member 8 through the pipe B to be laid. The tip of the pressure water supply pipe 22 provided is connected and communicated. Further, short pipes 12, 12 for excavating earth and sand are arranged at appropriate intervals in the circumferential direction at the front end of the space portion between the inner and outer pipes 2a, 2b of the intermediate body part 2, and the earth and sand removing pipes of these short pipes 12 are arranged. The earth and sand intake chamber in which the inlet 13 is opened forward from the front end wall 2c and the base end opening is formed between the inner pipe 2b and the fixed cylindrical member 8 by penetrating the inner pipe 2b.
A front end of a sludge discharge pipe 15 which is opened inside 14 and is piped through the pipe B to be laid is communicated with the sediment intake chamber 14.

The rear body portion 3 has its front end wall 3c slidably slidably contacting the rear end of the fixed disk 7 in the radial direction, and the front body 3a of the rear body portion 3 has a front end wall 3c. An outer peripheral end of a guide ring plate 16 arranged at a small distance from the front surface of 3c is integrally fixed, and the guide ring plate 16 is directed inward from the outer peripheral end face of the fixed disk 7. It is slidably inserted in the radial direction into the ring-shaped slot 17 formed by drilling.

Further, the inner ends of the rear part correction jacks 18 are fixed to the outer peripheral four sides of the rear end part of the axial member 4, while the rod ends of these jacks 18 are brought into contact with the inner pipe 3b of the rear body part 3. The operation of the jack 18 causes the rear torso 3 to be intermediate with the front torso 1.
The position of the body 2 can be corrected in the radial direction. Further, the front end surface of the tubular body B to be laid on the rear end wall 3d of the rear body portion 3 is brought into contact with the rear body portion 3, and the outer peripheral surface of the front end body of the tubular body B is attached to the rear end of the outer pipe 3a of the rear body portion 3. A thin cover plate 19 is provided so as to cover the.

A method of laying the pipe body B while correcting the bent portion C of the existing buried pipe that is deviated from the planned pipe by using the thus-constructed pipe path correcting device will be described. First, as shown in FIG. 5, a starting shaft D and a reaching shaft E are excavated at both end sides in the length direction of the pipe line that sandwiches the bent portion C, and a pipe line correcting device is arranged in the starting shaft D. As shown in FIG. 1, the front end cover plate 6 of the front body portion 1 covers the outer peripheral surface of the rear end portion of the existing buried pipe A exposed on the side of the starting shaft D through the packing 20 and the front end wall 1c. Is brought into contact with the rear end surface of the existing buried pipe A.

In this state, while the reaction force is supported on the wall surface of the starting shaft D by the plurality of propulsion jacks 21 installed in the starting shaft D, the pipe correcting device is pushed forward and the existing buried pipe A is advanced. Press in. After that, the front end surface of the pipe body B to be laid is joined to the rear end of the rear body portion 3 of the pipe path correcting device, and the rear end of the pipe body B is connected to the jack for propulsion.
While being pressed by 21 and following the conduit correction device, it is propelled along the buried trace of the existing buried pipe A. According to the press-fitting of the pipe body B from the starting shaft D side, the existing buried pipe A on the front side is pushed out to the reaching shaft E side, and is removed. The buried pipe A extruded into the reaching shaft E is carried out from the shaft E to the ground and supplied into the starting shaft D, and the pipe body B to be laid.
To reuse.

Thus, when the front body portion 1 of the conduit correction device reaches the bent portion C deviated from the planned pipeline while pushing the existing buried pipe A, the jack of the intermediate barrel portion 2 is pushed while pushing the existing buried pipe A. 9 is operated to correct the position of the intermediate barrel portion 2 on the planned pipeline. That is, as shown in FIG. 3, when the jack 9 arranged on the side to be corrected is extended and the jack 9 on the opposite side is contracted, the intermediate barrel portion 2 is moved to the front barrel as shown in FIG. The injection nozzle 10 disposed on the front end wall of the intermediate body portion 2 by gradually eccentrically moving in the radial direction with respect to the portion 1 and projecting a part of its outer periphery into the outer peripheral ground F of the planned pipeline.
Is opened toward the ground F.

At this time, when pressure water is pressure-fed to the injection nozzle 10 from the pressure water supply source 20 disposed on the side of the starting shaft D through the pressure water supply pipe 12, the injection nozzle opened toward the ground F.
Pressure water is jetted from 10 and the ground F is excavated so that the intermediate trunk portion 2 can be easily propelled on the planned pipeline. The excavated earth and sand becomes muddy water and flows into the inlet 13 of the short pipe 12 that is open to the front end wall of the intermediate trunk portion 2, and is discharged to the starting shaft D side through the mud pipe 15.

In this way, the intermediate body portion 2 is jacked 9
The ground F existing in the planned pipeline is excavated by the pressure water from the injection nozzle 10 while correcting the position on the planned pipeline by
When moving forward , the rear body 3 following the intermediate body 2 reaches the excavation mark , and the rear body 3 can be easily eccentrically moved toward the excavation mark by the operation of the jack 18.
Successively to a subsequent pipe B is planned pipe path to the rear body section 3, which continue to laying propulsion, the conduit repair apparatus all existing buried pipe A is when it reaches the arrival pit E side in the standing anti E The row of pipes B, which has been replaced with the existing buried pipeline, is laid on the planned pipeline between the starting vertical shaft D and the reaching vertical shaft E.

Since a space portion is formed in the ground on the side opposite to the ground F to be excavated by the injection nozzle 10 due to the eccentricity due to the position correction, this space portion is formed in the rear trunk portion 3 or the rear trunk portion 3. An appropriate filling material is injected from an appropriate position of the subsequent tube B through an injection port (not shown) to fill the tube. The space can also be filled with earth and sand excavated by the injection nozzle 10. Further, although the injection nozzle 10 is used as the excavating means in the above-described embodiment, a plurality of excavating means such as augers having a small diameter may be disposed in the outer peripheral portion of the front surface of the intermediate body portion 2 so as to be retractable. .

[0020]

As described above, according to the conduit correction device of the present invention .
If this is the case, connect the front body to the rear end of the existing buried pipe and
With the rear body connected to the pipe to be installed, the middle body
Since only one can be moved eccentrically in the radial direction,
Existing buried pipe or laying in contact with and difficult to move eccentrically
Easily eccentric on the planned pipeline only in the intermediate body regardless of the pipe body
It can be moved and the front end side of this intermediate body
The excavation means of the ground in front of the outer periphery of the intermediate trunk and the excavated earth and sand
Since the intake of the
Intermediate while excavating the ground in front of the intermediate trunk by excavating means
The trunk can be accurately advanced along the planned pipeline.
It is something.

Further, the pipe body to be laid is followed.
The rear body part also moves eccentrically in the radial direction with respect to the front body part and the intermediate body part.
It is configured to let the intermediate body part as described above.
As excavation marks are formed along the planned pipeline,
Rear trunk that has moved forward integrally with the intermediate trunk and reached the excavation mark
Easily excavated marks without receiving great resistance from the ground
Can be eccentrically moved to the side, and therefore
Do not reposition the following pipes toward the prescribed planned pipeline.
It is possible to bury the waste efficiently on the planned pipeline.
As the work period is shortened, the pipes can be corrected safely and accurately.
It is possible to work.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a conduit correction device,

FIG. 2 is a vertical sectional front view taken along line AA of FIG.

FIG. 3 is a vertical sectional front view taken along line BB of FIG.

FIG. 4 is a vertical sectional front view taken along the line CC of FIG.

FIG. 5 is a simplified vertical sectional side view at the time of starting the tube propulsion,

FIG. 6 is a vertical sectional side view showing a bent portion correction state;

[Explanation of symbols]

 1 Front body part of pipeline correction device 2 Middle body part 3 Rear body part 4 Shaft core member 9 Correction jack 10 Pressure water injection nozzle 13 Excavation sediment inlet 18 Rear correction jack A Existing buried pipe B Pipe to be laid C Bending section D Starting shaft E Reaching shaft

Claims (1)

[Claims] 1. A front body part to be connected to a rear end of an existing buried pipe, an intermediate body part connected to the front body part, and a pipe body to be laid at the rear end, the front end being connected to the intermediate body part. The front body of the shaft member is fixed to the center of the front body.
And set the rear end of this shaft center member inside the rear trunk.
Rear fixing jigs attached to the outer peripheral surface of the rear end at multiple locations.
The rear body is eccentrically movable by the jack in the radial direction with respect to the front body and the middle body.
Can be eccentrically moved in the radial direction with a correction jack
And the outside of the intermediate barrel on the front end side of this intermediate barrel.
Pipe adjustment device also is provided with the inlet of the drilling means and said drilling sediment peripheral portion front ground.