JP3170215B2 - Pipe burial method - 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 for burying a pipe such as a gas pipe or a sewer pipe in the ground by a propulsion method.

[0002]

2. Description of the Related Art Conventionally, when a pipe 23 is buried in a stagnant gravel ground, the ground is excavated by a shield machine 21 from a starting shaft side to an reaching shaft side through a temporary pipe 24 through the shield machine 21. The pipe 23 is successively moved forward and pushed forward. At this time, the outer peripheral surface of the pipe body 23 may be directly contacted with the excavated ground and may be damaged, or the propulsion of the pipe body 23 may be difficult and long-distance construction may not be performed.
As shown in FIG. 12, the ground is excavated by a shield machine 21 having a diameter larger than that of the pipe 23, and a lubricating material 28 such as a bentonite solution is injected and filled into a gap between the excavated ground and the pipe 23 while being propelled. When the shield machine 21 reaches the reaching shaft side, the packing machine 21 attached to the wellhead 25 of the reaching shaft 22
The pipe 23 is buried between the starting shaft and the reaching shaft by removing the shield machine 21 and the temporary pipe 24 while sliding the outer peripheral surface of the pipe.

[0003]

However, according to the above-described method for burying and burying a tubular body, the shield machine 21 is provided with the reaching shaft 22.
The shield machine 21 reaches the reaching shaft 22 while excavating the improved ground portion 30 of the well, so that the outer peripheral surface of the shield machine 21 slides on the excavation wall surface of the improved ground portion 30 and the shield machine 21 is taken out into the reaching shaft through the excavated portion. In this case, relatively little groundwater and water from the sliding material 28 flow out, but since the shield machine 21 is followed by a pipe 23 having a smaller diameter than the shield machine 21, the temporary pipe 24 and the pipe following the shield machine 21 follow. As shown in FIG. 13, when the shield machine 21 is removed, the drainage of the groundwater and the sliding material 28 through the void portion occurs despite the presence of the wellhead packing 26 due to the stepped portion between the body 23 and the step. Becomes intense.

Further, with the flow of the water, the sand and gravel move toward the wellhead, and as the pipe 23 is propelled toward the wellhead, the sand and gravel stagnate in the wellhead in a condensed state.
Not only requires a large pressing force, but also has a problem that the pipe 23 is damaged by the gravel. For this reason, when propelling and embedding a pipe body in the stagnant gravel ground as described above, it was necessary to perform a flood prevention treatment such as a chemical solution injection treatment on the ground at the wellhead portion.

The present invention has been made in view of the above problems, and prevents groundwater, lubricating material, and gravels from flowing out without the necessity of processing such as ground improvement and chemical injection at a pit portion of a reaching shaft. It is another object of the present invention to provide a method of burying a pipe body that can be smoothly and reliably buried in a stagnant gravel ground following a shield machine.

[0006]

According to a first aspect of the present invention, there is provided a method of burying a tubular body according to the first aspect of the present invention, wherein a shield machine excavates the ground from a starting shaft toward a reaching shaft while excavating the ground. A method of propelling and embedding pipes following the machine from the starting shaft to the ground between the reaching shafts, and inserting and integrating the pipes into a cylindrical body having the same outer diameter as the shield machine, and integrating these tubular bodies. And a pipe body immediately following the shield machine, and a pipe body having the same outer diameter as the pipe body is sequentially propelled and buried while sequentially following the pipe body inserted into the cylindrical body, and the shield machine reaches the shaft. After reaching the inside, the shield machine is removed to the arrival shaft side, and the tip end of the cylindrical body is left in the excavation ground in a state facing the entrance of the arrival shaft.

According to a second aspect of the present invention, while excavating the ground with a shield machine from a starting shaft to an arrival shaft, a temporary pipe having the same outer diameter as the shield machine is made to follow the shield machine and propelled and buried, Furthermore, a method of propelling and burying a pipe from the starting shaft to the reaching shaft by sequentially following the pipe to the temporary pipe, and connecting a tubular body having the same outer diameter as the temporary pipe to the last temporary pipe. The first pipe to be embedded in the cylinder is inserted and integrated, and the pipes having the same outer diameter are sequentially propelled and buried while sequentially following the pipes. The temporary pipe to be removed is removed and left in the excavated ground with the opening of the tip end of the tubular body reaching the reaching shaft facing the wellhead of the reaching shaft.

A third aspect of the present invention relates to a method of burying and burying a tubular body according to the present invention. In this method, while excavating the ground with a shield machine, a temporary pipe is made to follow the shield machine to be propelled and buried. A method in which a pipe body having the same outer diameter as the temporary pipe is successively succeeded to the temporary pipe at the tail and propelled and buried in the ground between the start shaft and the arrival shaft, and the same as the shield machine immediately after the shield machine. While connecting a cylindrical body having a diameter, the leading temporary pipe is detachably inserted and fitted into this cylindrical body, integrated, and propelled while embedding a temporary pipe of the same diameter in sequence to the temporary pipe, embedding,
Next, the pipe having the same outer diameter as the temporary pipe is sequentially propelled and buried while sequentially following the last temporary pipe, and when the first temporary pipe reaches the entrance of the reaching shaft, the temporary pipe is coated. The tubular body is separated from the temporary pipe, and the tubular body is pushed toward the reaching shaft side through the tubular body by the promotion of the tubular body in a state where the tubular body faces the entrance of the reaching shaft and is left in the excavated ground by the promotion of the tubular body. The pipe is buried between the starting shaft and the reaching shaft.

[0009]

According to the first aspect of the present invention, when a tube having a smaller diameter than the cylinder is inserted into a cylinder having the same outer diameter as the shield machine, these cylinders and the tube are connected to each other. It is arranged immediately after the shield machine and pushed forward by the pressing device from the starting shaft side. At this time, since the tube inserted into the tube is integrally connected to the tube, the tube is formed shorter than the tube, and the front end surface of the tube is connected to the rear end of the shield machine. on the other hand,
By pushing the rear end face of the tubular body protruding from the tubular body by the pressing device, it can be smoothly propelled and the connection of the next tubular body to the rear end of the tubular body can be easily performed.

[0010] After the pipe integrated with the above-mentioned tubular body is made to follow the shield machine and propelled and buried in the ground, the next pipe is connected and propelled and buried while excavating the ground in front with the shield machine. While repeating this work, the pipes are sequentially propelled and buried underground. At this time, a lubricating material is injected and filled into the gap between the wall surface excavated by the shield machine and the outer peripheral surface of the pipe through the injection pipe from the front pipe, thereby reducing the propulsion resistance of the pipe.

When the shield machine reaches the reaching shaft, an annular wellhead packing mounted on the wellhead presses against the outer peripheral surface of the shield machine, and groundwater and sliding materials from the excavated ground side flow out to the reaching shaft side. The shield machine is pushed out into the arrival shaft while preventing the storm. When the shield machine is removed, the cylinder following the shield machine reaches the reaching shaft side integrally with the tube, and the front end of the cylinder projects from the wellhead into the reaching shaft. At this time, since the outer diameter of the cylindrical body is formed to have the same diameter as the shield excavator, the packing attached to the wellhead continuously presses against the outer peripheral surface of the cylindrical body from the outer peripheral surface of the shield machine, In this state, by leaving the tubular body in the excavated ground, it is possible to reliably prevent the groundwater and the sliding material existing in the gap between the pipe buried in the ground and the excavated ground from flowing out to the reaching shaft side. Since the groundwater and the sliding material do not flow toward the arriving shaft, there is no danger that the gravel on the excavated ground will remain in the pit mouth in a compact state. Therefore, unlike the conventional case, it is not necessary to perform a chemical liquid injection treatment on the entrance of the reaching shaft, and the pipe body can be reliably and efficiently propelled and buried.

According to a second aspect of the present invention, a pipe body is connected to a shield machine through a plurality of temporary pipes having the same outer diameter as the shield machine and having built-in equipment units necessary for excavating the shield machine. This is a method of propelling and burying while making it follow, in this method, a tube having a smaller diameter than the tubular body is inserted into a tubular body having the same outer diameter as the temporary tube in the last temporary tube. And are connected in an integrated state. Then, after the shield machine and the temporary pipe following the shield machine are propelled and buried underground from the starting shaft side, the above-mentioned cylinder is connected to the last temporary pipe, and the pipe inserted into this cylinder is inserted. A ground excavated by a shield machine in the same manner as in the invention according to claim 1 above, wherein the body is propelled and embedded integrally with the cylindrical body, and the tubular body having the same outer diameter is sequentially connected to the tubular body. It is promoted and buried inside. At this time, the sliding material is injected and filled into the gap between the wall surface excavated by the shield machine and the outer peripheral surface of the pipe body in the same manner as described above to reduce the propulsion resistance of the pipe body.

When the shield machine reaches the reaching shaft, the outer peripheral surface of the shield machine is pressed against an annular wellhead packing mounted on the wellhead, and groundwater and sliding materials from the excavated ground side flow out to the reaching shaft side. Pushing the shield machine to the reaching shaft side and removing it while removing the temporary tube following the shield machine is also pushed out into the reaching shaft while pressing the wellhead packing against the outer peripheral surface and removed, and the last temporary tube The tip of the tubular body following the pipe is projected into the reaching shaft, the wellhead packing is pressed against the outer peripheral surface of the tubular body, and the tubular body is left in the excavated ground. A row of pipes following the pipe from the body is buried between the starting shaft and the reaching shaft.

Also in this invention, since the temporary pipe and the cylindrical body are formed to have the same outer diameter as the shield machine, the wellhead packing is continuously pressed against the outer peripheral surface of the temporary machine and the shield machine pushed into the reaching shaft. 2. The method as claimed in claim 1, wherein the pressing member is kept pressed against the outer peripheral surface of the distal end portion of the cylindrical body to be left.
In the same manner as the invention described in (1), it is possible to reliably prevent the groundwater and the sliding material existing in the gap between the pipe buried in the ground and the excavated ground from flowing out to the reaching shaft side. In the present invention, a plurality of temporary pipes are propelled and buried between the starting shaft and the reaching shaft following the shield machine, and then the above-mentioned tube is integrally inserted into the last temporary tube on the starting shaft side. The temporary tube and the tube can be replaced by sequentially propelling and embedding a tube of the same diameter through a tube having a smaller diameter than the tube through the tube.

According to a third aspect of the present invention, in the method of propelling and burying a pipe in the ground while sequentially following a pipe through a temporary pipe on a shield machine, the temporary pipe and the pipe have the same outer diameter. In this case, immediately after the shield machine, the above-mentioned tubular body having the same outer diameter as the shield machine is made to follow, and a temporary pipe is removably inserted into this tubular body, and the shaft is reached from the starting shaft in an integrated state. Propelled and buried according to the excavation of the shield machine toward. After embedding a plurality of temporary pipes, the propulsion and embedding is performed while sequentially connecting the pipes to the last temporary pipe. The gap between the wall surface excavated by the shield machine and the outer peripheral surfaces of the temporary pipe and the tubular body is filled with a lubricant in the same manner as described above to reduce the propulsion resistance of the tubular body.

The shield machine which has reached the reaching shaft is removed in the reaching shaft while pressing the wellhead packing against the outer peripheral surface in the same manner as described above, and the cylinder connected immediately after the shield machine is inserted into the reaching shaft. Then, the wellhead packing is left in a state of being pressed against the outer peripheral surface of the front end portion, and the tubular body is fixed to the wellhead and the connection of the temporary pipe to the tubular body is released.

In order to release the connection of the temporary tube from the cylinder, when the front ends thereof are integrated by welding,
When the welded portion is projected from the wellhead packing into the reaching shaft and cut off, and when the front ends of both are connected by bolts, the bolts may be removed. Further, when the locking flange formed at the front end of the tubular body is locked to the front end of the temporary pipe, the locking flange is cut off.

Thus, the temporary pipe separated from the cylindrical body is pushed out into the reaching shaft and removed, and the temporary pipe following this temporary pipe is also pushed out into the reaching shaft through the cylindrical body, and the leading pipe body is removed. A series of small-diameter pipes are buried in the ground between the starting shaft and the reaching shaft by being inserted into the body and facing the reaching shaft.

In any of the above tube embedding methods,
After the shield machine reaches the reaching shaft, until the shield machine is removed to the reaching shaft side and the front end of the cylindrical body is in the reaching shaft, the wellhead packing is always the outer peripheral surface of the shield machine. , And slides continuously until it reaches the outer peripheral surface of the cylinder,
While maintaining the crimped state and leaving the cylinder to remain, it is ensured that groundwater and sliding materials existing in the gap between the pipe buried in the ground and the excavated ground flow to the reaching shaft side. In addition, even if the groundwater or the sliding material flows toward the reaching shaft due to the propulsive movement of the pipe, the pipe is pressed against the rear end face of the pipe and the outer peripheral face of the tip of the pipe. It is possible to reliably prevent the outflow to the reaching shaft side by the wellhead packing, and therefore, it is not necessary to perform a chemical injection process on the wellhead portion of the reaching shaft as in the conventional case, and to promote the pipe body and burying work Can be performed efficiently.

[0020]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a shield machine according to a first embodiment of the present invention; FIG. Shielding machine 1 while starting 2
This shows a state where the shield machine 1 is further excavated from this state toward the reaching shaft 12, and by adding a pipe 2 of the same diameter from the start shaft 11 side for every fixed length excavation. A series of pipes are buried in the excavation ground extending from the starting shaft 11 to the reaching shaft 12.

In the above method, when starting the excavation by starting the shield machine 1 from the starting shaft 11, the first pipe 2 connected to the rear end of the shield machine 1 is formed to have the same outer diameter as the shield machine 1. Inserted and integrated into the steel plate cylinder 3 thus set. The length of the tubular body 2 is the length of the tubular body 2 inserted into the tubular body 2.
In order to easily connect the next pipe 2 to the rear end, the pipe 2 is formed to have substantially the same length as that of the pipe 2 or FIG.
As shown in FIG. 4 to FIG. 4, it is formed shorter than the tube 2.

When the tube 2 is a steel tube, the tube 2 and the tube 3 are integrated into the tube 3 as shown in FIG.
A means can be employed in which the front end portions are integrally connected to each other by welding 31 while the front end faces are flush with each other by inserting and fitting the pipe body 2 having a smaller diameter than that of the pipe 2, as shown in FIG. , Tube 2
A bolt box 32 is recessed on the inner peripheral surface of the front end of the cylindrical body 3 and a bolt 34 is screwed from the bolt box 32 into a screw hole 33 provided on the inner peripheral surface of the front end of the cylinder 3 to integrally connect the two. You may leave.

Further, in addition to the connecting means for fixing the tube 2 and the tube 3 by the welding 31 and the bolts 34 as described above, as shown in FIG. 4, the front end of the tube 3 is bent inward. To form an annular locking flange portion 35 having a protruding width shorter than the wall thickness of the tubular body 2, and lock the front end face of the tubular body 2 inserted into the tubular body 3 to the inner surface of the locking flange portion 35. The structure may be such that they are connected by being connected. According to this connection structure, it can be optimally adopted when the pipe 2 is a concrete pipe that cannot be welded.

As described above, by integrally inserting the tube 2 into the tube 3, the acting force for pushing the rear end of the tube 2 is transmitted to the tube 3, and the tube 2 and the tube 3 are transmitted. And the front ends of these tubes 2 and 3 are connected immediately after the shield machine 1 as described above, and are propelled and buried from the inside of the starting shaft 11 into the ground. As is well known, the shield machine 1 is provided with a drive motor at the front end of the opening of the cylindrical body 1a.
A circular cutter plate 1c rotated by 1b is rotatably supported, and a plurality of direction correcting jacks 1d are mounted at a plurality of positions in the rear portion of the body 1a (see FIG. 6).

The front end surface of the tube 2 inserted into the tube 3 is brought into contact with and received by the direction correcting jack 1d, and the front end of the tube 3 having the same outer diameter as the outer diameter of the shield machine 1 is received. As shown in FIG. 5, only the portion is formed in a small-diameter portion that can be inserted into the fuselage 1a of the shield machine 1, and this small-diameter portion is inserted into the fuselage 1a and its outer peripheral surface is formed in the rear end of the fuselage 1a. A state is brought into sliding contact with the annular seal packing 17 provided on the peripheral surface. In addition,
The outer diameter of the cylindrical body 3 may be substantially equal to the inner diameter of the body 1a of the shield machine 1. In short, as described later, the reaching shaft
The diameter may be such that the twelve wellhead packings 6 can be continuously slid from the outer peripheral surface of the body 1a of the shield machine 1 to the outer peripheral surface of the cylindrical body 3 with substantially uniform pressing force. Therefore, as shown in FIGS. 2 to 4, the cylindrical body 3 may be formed to have the same diameter substantially equal to the inner diameter of the shield machine 1 over the entire length, or the cylindrical body 3 may be formed in these figures. May be formed to have the same diameter as the outer diameter of the shield machine 1, and only the front end thereof may be formed to have a diameter that can be inserted into the body 1a of the shield 1.

On the other hand, as shown in FIG. 1, a reaction force receiving member 13 is disposed on the wall surface of the starting shaft 11 as shown in FIG.
A plurality of propulsion jacks 14 for pushing the pipe 3 are attached to the front of the shaft, and the starting shaft of the starting shaft 11 is pressed against the outer peripheral surface of the tube 2 to inject groundwater and the like into the starting shaft 11. A wellhead packing 15 is installed to prevent this.

The shield machine 1 is started from the starting shaft 11 while the outer peripheral surface of the body 1a is pressed against the wellhead packing 15 and the circular cutter plate 1c is rotated while the stagnant ground 10
And the rear end face of the pipe 2 inserted into the cylindrical body 3 is pushed forward by the propulsion jack 14 to excavate the shield machine 1, and the pipe body 2 is excavated in the tunnel-shaped excavation ground 9 excavated by the shield machine 1. Then, the next tube 2 is added to the tube 2 and then the tube 2 is pressed by the propulsion jack 14 to excavate the shield machine 1. In this way, the shield machine 1 is added while sequentially adding the fixed-length pipes 2 in series.
And an injection hole (not shown) drilled at the rear end of the tube 2 inserted into the cylindrical body 3 according to the excavation or at the front end of the tube 2 connected to the tube 2. The sliding material 8 is injected and filled into the gap 16 between the wall surface excavated by the shield machine from the inside of the pipe 2 and the outer peripheral surface of the pipe 2 through the injection pipe (not shown) connected to and communicated with the injection hole. And pipe 2
Excavation while reducing propulsion resistance.

When the shield machine 1 reaches the reaching shaft 12, as shown in FIG. 6, the outer peripheral surface of the body 1a is pressed against the ring-shaped well packing 6 attached to the well 5 of the reaching shaft 12, and the shielding is performed. The propulsion of the propulsion jack 14 prevents the groundwater and the sliding material 8 from flowing into the reaching shaft 12 through the gap between the outer peripheral surface of the body 1a of the machine 1 and the excavated ground 9, thereby preventing the groundwater and the sliding material 8 from flowing through the tube row. Push the shield machine 1 into the reaching shaft 12.
At this time, although not shown, the shield machine 1 is pushed out onto the supporting member while being supported by a suitable supporting member in the reaching shaft 12.

When the shield machine 1 is entirely pushed into the reaching shaft 12, the front end of the cylindrical body 2 connected to the rear end of the shield machine 1 reaches the wellhead 5. At this time, since the outer diameter of the cylindrical body 3 is formed to be the same as that of the shield machine 1, the wellhead packing 6 has the same pressure contact force as the outer circumferential surface of the body 1 a of the shield machine 1, and has a cylindrical shape from the outer circumferential surface of the shield machine 1. It is continuously pressed against the outer peripheral surface of the body 3 to prevent groundwater and the sliding material 8 from entering the reaching shaft 12 from the gap between the cylindrical body 3 and the excavation wall. In addition,
The shield machine 1 pushed into the arrival shaft 12 is removed.

In this way, as shown in FIG. 7, the tubular body 3 into which the foremost tubular body 2 is inserted is left in the excavated ground with its tip opening facing the entrance of the reaching shaft, A group of pipes 2 connected in series from the pipes 2 in the cylindrical body 3 is buried in the excavation ground 9 between the starting shaft 11 and the reaching shaft 12. In addition, if necessary,
A fixing jig 7 is attached around the twelve wellheads 5, and the opening end of the cylindrical body 2 is fixed and supported by the fixing jig 7.

FIGS. 8 and 9 show another method of propelling and embedding a pipe according to the present invention. In the above-mentioned method, the cylindrical body 3 into which the leading pipe 2 is integrally fitted is used for the shield machine 1. Immediately after that, the following method was used.
One or several temporary pipes 4A having the same outer diameter as the outer diameter of the shield machine 1 are interposed between the first tubular body 2 and the tubular body 3 into which the leading tubular body 2 is inserted. Only the front end of the leading temporary pipe 4A is formed in a small diameter portion that can be inserted into the body 1a of the shield machine 1. Note that all the temporary tubes 4A may be formed to have substantially the same diameter as the inner diameter of the shield machine 1.

Then, after the equipment unit (not shown) such as the hydraulic equipment for rotating the cutter plate of the shield machine 1 and the hydraulic equipment for driving the direction correcting jack is mounted in the temporary pipe 4A, the shield machine 1 is mounted behind the shield machine 1. It is connected to the end sequentially and propelled from the starting shaft 11 side to the reaching shaft 12 by the propulsion jack 14,
After the temporary pipe 4A is pushed into the ground 9 excavated by the shield machine 1, the tubular body 3 in which the tubular body 2 is integrally fitted is connected to the rear end of the temporary pipe 4A, and the tubular body 2 is connected. Propelled by the propulsion jack 14 and embedded.

The tube 2 has the same shape as the tube 2.
Work is performed on the excavation ground 9 of the shield machine 1 that excavates from the arrival shaft 11 toward the start shaft 12 while sequentially adding the ground, and between the wall surface excavated by the shield machine 1 and the outer peripheral surface of the pipe 2. The operation of injecting and filling the sliding material 8 into the gap 16 from the inside of the tube 2 on the front side is the same as the above-mentioned method. When the shield machine 1 reaches the reaching shaft 12, it is attached to the pit 5 of the reaching shaft 12. While the outer peripheral surface of the body 1a is pressed against the ring-shaped wellhead packing 6, the propulsion jack 14 drives the shield machine 1 through the temporary pipe 4A and the small-diameter pipe row.
Is pushed into the arrival shaft 12.

Further, a temporary pipe subsequent to the shield machine 1
4A is also pushed into the reaching shaft 12 from the wellhead 5 of the reaching shaft 12 while pressing the wellhead packing 6 against the outer peripheral surface, and the shield machine 1 and the temporary tube 4A are sequentially removed, and at the rear end of the last temporary tube 4A. The connected tubular body 3 is left at a position where the front end thereof faces the inside of the reaching shaft 12 from the wellhead 5 and the wellhead packing 6 is pressed against the outer peripheral surface, and is connected in series from the tubular body 2 in the tubular body 3. 2 shafts connected to the starting shaft 11 and the reaching shaft
It is to be buried in the excavation ground 9 between the twelve.

In this state, the entrance 5 of the arrival shaft 12
The cylindrical body 3 having its front end facing the reaching shaft 12 is buried and fixed with its outer peripheral surface in contact with the excavated ground 9, and is located between the tubular body 2 and the excavated ground 9 that follow. The outflow of the groundwater and the sliding material from the gap 16 to the reaching shaft 12 is prevented at the rear end surface, and the groundwater and the sliding material are formed in a slight gap between the outer peripheral surface of the cylindrical body 3 and the excavated ground 9. Even if water enters, the wellhead packing 6 pressed against the outer peripheral surface of the front end portion of the cylindrical body 3 with a strong press contact force can prevent water from flowing out to the arrival shaft 12 side.

In the method of propelling and embedding the pipe body 2 using the temporary pipe 4A, a large number of temporary pipes are provided over the entire length of the ground between the starting shaft 11 and the reaching shaft 12 in advance after the shield machine 1. After the tube 4A is buried in series, the last temporary tube 4A is connected with the tube 2 inserted into the cylindrical body 3 as described above, propelled and buried, and sequentially following this tube 2, While the pipe 2 is propelled and buried, the shaft 2 is reached in accordance with the propulsion and burial of the pipe 2.
By pushing out the temporary pipe 4A on the 12 side and removing it, the starting shaft
The row of temporary pipes 4A between 11 and the reaching shaft 12 may be replaced with two rows of pipes.

FIGS. 10 and 11 show still another method of burying a tubular body according to the present invention. In the method of burying a tubular body 2 using the temporary pipe 4A, the outer diameter of the temporary pipe 4A is shown in FIG. Used the same diameter as the shield machine 1, but in this method,
A small-diameter temporary pipe 4 having the same outer diameter as the outer diameter of the pipe body 2 is used, and the tubular body 3 formed to have the same outer diameter as the shield machine 1 is covered on the first temporary pipe 4 connected immediately after the shield machine 1. The following temporary pipe 4 and pipe 2 are propelled and buried in a state where they are fitted and integrally propelled.

The cylindrical body 3 is formed to have the same length as the small-diameter temporary pipe 4 or to be shorter than the temporary pipe 4.
The structure shown in FIGS. 2 to 4 is adopted as a means for inserting and connecting. That is, in FIG. 2, the small-diameter temporary pipe 4 is inserted into the cylindrical body 3 and the front end faces are flush with each other in a state where the front end faces are flush with each other. In the above, a bolt box 22 is recessed on the inner peripheral surface of the front end portion of the small-diameter temporary pipe 4 so that the bolt box 22
A bolt 24 is screwed into a screw hole 23 provided on the inner peripheral surface of the front end portion of the cylindrical body 3 on both sides to integrally connect the two.
When the outer diameter of these cylindrical bodies 3 is formed to be the same as the outer diameter of the shield machine 1, only the front end thereof is a small-diameter portion that can be inserted into the front body 1 a of the shield machine 1. In advance.

In addition to the connecting means for fixing the cylindrical body 3 and the small-diameter temporary pipe 4 by the welding 21 and the bolt 24 as described above,
As shown in FIG. 4, the front end of the cylindrical body 3 is bent inward to form an annular locking flange 25 having a projection width shorter than the thickness of the temporary body 4.
May be formed so that the front end face of the small-diameter temporary pipe 4 inserted into the cylindrical body 3 is locked to the inner face of the locking flange 25 so as to be connected.

As described above, the small-diameter temporary tube 4 is inserted into the cylindrical body 3 and connected to each other, and the front end surfaces of the cylindrical body 3 and the small-diameter temporary tube 4 are connected immediately after the shield machine 1. Starting shaft 11
And the small-diameter temporary pipe 4 is pushed forward by the propulsion jack 14 and buried in the ground 9 excavated by the shield machine 1, and then the required number of small-diameter temporary pipes 4 are sequentially added to the small-diameter temporary pipe 4. Promote and bury while connecting.
When the last small-diameter temporary pipe 4 is buried, a pipe 2 having the same outer diameter as the temporary pipe 4 is connected to the small-diameter temporary pipe 4, and the pipes 2 are sequentially added and connected in the same manner as described above. Jack while pushing
Propelled by 14 and buried in the ground 9 excavated by the shield machine 1. Further, between the wall surface excavated by the shield machine 1 and the outer peripheral surface of the pipe 2 through the injection hole (not shown) formed in the small-diameter temporary pipe 4 or the leading pipe 2 in the same manner as described above. The gap 8 is filled with the lubricating material 8 so as to reduce the propulsion resistance of the tube 2.

When the shield machine 1 reaches the reaching shaft 12, the outer peripheral surface of its body 1a is pressed against the ring-shaped well packing 6 attached to the well 5 of the reaching shaft 12, and the shielding machine 1
The small-diameter temporary pipe 4 and the row of pipes are driven by the propulsion of the propulsion jack 14 while preventing the underground water and the sliding material 8 from flowing into the reaching shaft 12 through the gap between the outer peripheral surface of the fuselage 1a and the excavated ground 9. As shown in FIG. 10, the shield machine 1 is pushed into the reaching shaft 12 and removed, and the front end of the cylindrical body 2 connected to the rear end of the shield machine 1 is moved from the wellhead 16 into the reaching shaft 12. And the wellhead packing 6 is pressed against the outer peripheral surface thereof and is left buried in the excavated ground 9.

Thereafter, the shaft reached from the wellhead packing 6
At the front end protruding into the connecting portion with the small-diameter temporary pipe 4, that is, when welding 21 is performed as shown in FIG. 2, the welded portion is cut off, and as shown in FIG. In this case, the bolt 24 is removed, and as shown in FIG. 4, when the locking flange 25 is locked to the front end face of the small-diameter temporary pipe 4, the locking flange 25 is cut off to remove the cylindrical body. The connection of the small-diameter temporary tube 4 to the small-diameter temporary tube 4 is released.

In this state, when the tubular body 2 is sequentially propelled and embedded from the starting shaft 11 side, the small-diameter temporary pipe 4 in the tubular body 3
Is pushed out into the arrival shaft 12 and is followed by a small-diameter temporary pipe 4
11 is sequentially pushed out of the reaching shaft 12 through the cylindrical body 3 and removed, and as shown in FIG. 11, the leading tube 2 is inserted into the cylindrical body 3 and the starting shaft 11 A series of pipes 2 are buried in the ground between the reaching shafts 12. At this time, the small-diameter temporary pipe 4 is removed and the first pipe 2 is inserted into the cylinder 3.
In the case of insertion, the wellhead packing 6 is pressed against the outer peripheral surface of the cylindrical body 3 formed to have the same outer diameter as the shield machine 1. Lumber 8
Prevents intrusion into the arrival shaft 12.

As the small-diameter temporary pipe 4 used in this method, a pipe in which a discharge pipe for excavated soil, a pipe for sending and discharging mud to a face, and the like may be employed. In this case, the starting shaft 11
From the starting shaft 11 while connecting the tubular body 3 in which the small-diameter temporary pipe 4 is inserted and the temporary pipe 4 of the same shape to the small-diameter temporary pipe 4 sequentially to the shield machine 1 that excavates from the starting vertical shaft 12 to the reaching vertical shaft 12. Over the entire length of the reaching shaft 12, the four rows of temporary pipes are buried once, the shield machine 1 is removed into the reaching shaft 12, and the wellhead packing 6 is pressed against the outer peripheral surface of the front end of the cylindrical body 3, The cylindrical body 3 and the small-diameter temporary tube 4 inserted into the cylindrical body 3
After releasing the connection with the starting shaft,
The small diameter temporary pipe 4 buried between both shafts is pushed out through the cylindrical body 3 to the reaching shaft 12 side by removing and propelling the pipes 2 while sequentially connecting the pipes 2 from 11 to replace the temporary pipe row with the pipe row. Is what you do.

[Brief description of the drawings]

[Fig. 1] Propelling the pipe from the starting shaft to the reaching shaft,
Simplified longitudinal side view showing the state of being buried,

FIG. 2 is a longitudinal sectional side view showing a state in which a pipe or a small-diameter temporary pipe is inserted into a cylinder and connected by welding;

FIG. 3 is a longitudinal sectional side view of a state in which a pipe or a small-diameter temporary pipe is inserted into a cylinder and connected by bolt welding;

FIG. 4 is a longitudinal sectional side view of a state in which a tubular body or a small-diameter temporary pipe is inserted into a tubular body and brought into contact with a distal end locking flange portion of the tubular body.

FIG. 5 is a simplified vertical sectional side view showing a state in which a tubular body containing a tubular body is connected to a shield machine;

FIG. 6 is a simplified longitudinal side view of the state in which the shield machine has reached the reaching shaft;

FIG. 7 is a simplified vertical side view of the state where the shield machine has been removed,

FIG. 8 is a simplified longitudinal side view for explaining another pipe burying method of the present invention;

FIG. 9 is a simplified vertical cross-sectional side view of a state where the embedding of the pipe is completed,

FIG. 10 is a simplified longitudinal side view for explaining still another pipe burying method of the present invention;

FIG. 11 is a simplified vertical cross-sectional side view of a state where the embedding of the pipe is completed,

FIG. 12 is a simplified vertical sectional side view for explaining a conventional pipe burying method;

FIG. 13 is a simplified vertical cross-sectional side view of a state in which the shield machine has been pushed out to the reaching shaft side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shield machine 2 Tube 3 Tube 4 Temporary tube 5 Wellhead 6 Wellhead packing 8 Lubricating material 9 Excavated ground 10 Gravel with stagnant gravel 11 Starting shaft 12 Reaching shaft

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-10-25989 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E21D 9/06 311 E21D 9/06 301

Claims (3)

(57) [Claims] 1. A method for propelling and burying a pipe following a shield machine in the ground between a start shaft and an arrival shaft while excavating the ground with a shield machine from a start shaft toward an arrival shaft. The pipes are inserted and integrated into a cylinder having the same outer diameter as that described above, and these cylinders and the pipe are made to follow immediately after the shield machine, and the pipe is inserted into the pipe inserted into the cylinder. After the pipe with the same outer diameter as the body is sequentially propelled and buried, and after the shield machine reaches the reaching shaft, the shield machine is removed to the reaching shaft side, while the tip opening of the above cylindrical body reaches the reaching shaft. A method for propelling and embedding a pipe body, wherein the pipe body is left in an excavated ground in a state of facing a wellhead. 2. While excavating the ground with a shield machine from a starting shaft to an arrival shaft, a temporary pipe having the same outer diameter as the shield machine is made to follow the shield machine and propelled and buried. This is a method of propelling and burying the body in the ground between the starting shaft and the reaching shaft by sequentially following the body, and connecting a tubular body having the same outer diameter as the temporary pipe to the last temporary pipe and burying it in this cylindrical body. The first pipe to be inserted is inserted and integrated, and the pipes having the same outer diameter are sequentially propelled and buried while sequentially following the pipes, while the temporary pipe pushed into the reaching shaft by this propulsion and burial is removed. A method for propelling and embedding a tubular body, characterized in that a tip end opening of the above-mentioned tubular body that has reached a reaching shaft is left in the excavated ground in a state facing the opening of the reaching shaft. 3. While excavating the ground with a shield machine, a temporary pipe is made to follow the shield machine to be propelled and buried, and a pipe having the same outer diameter as the temporary pipe is successively added to the last temporary pipe. This is a method of propelling and burying the ground from the starting shaft to the reaching shaft by connecting a cylinder having the same outer diameter as the shield machine immediately after the shield machine, and attaching and detaching the first temporary pipe to and from this cylinder. Propulsion and embedding while freely inserting, integrating and temporarily following the temporary tube with the same diameter sequentially to the temporary tube, and then
The above-mentioned tubular body covering this temporary pipe when the first temporary pipe reaches the entrance of the arrival shaft when the first temporary pipe reaches the pit of the reaching shaft by propelling and burying a pipe having the same outer diameter as the temporary pipe successively to the last temporary pipe. Is separated from the temporary pipe, and while the cylindrical body faces the pit of the reaching shaft and is left in the excavated ground, the temporary pipe is sequentially pushed to the reaching shaft side through the cylindrical body by propulsion of the tubular body to start the shaft. A method of burying and burying a pipe between a shaft and a reaching shaft.