JP2001032680A - Extension method for piping and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent water from flowing out when pipes are separated by moving a pipe blocking device stored in a branch pipe of a mud delivery and mud discharge travel pipe into a mud delivery and mud discharge extension pipe by an air delivery means. SOLUTION: When mud delivery extension pipe 4 and a mud discharge extension pipe 11 are extended, a compressor 31 is driven after opening and closing a predetermined valve by a controller 33 to move a pig 23 in a branch pipe 6A into a mud feeding travel pipe 6 by air pressure. Next, the predetermined valve is opened and closed to move a pig 24 in a branch pipe 10A into a mud discharge travel pipe 10 by air pressure of the compressor 31. At this time, mud water on pipe 6, 10 sides is discharged from a water discharge pipe 15 through a predetermined pipe in accordance with the travel of pigs 23, 24. Then, the predetermined valve is opened and closed after extending pipes to return the pigs 23, 24 into the branch pipes 6A, 10A by mud water pressure. Further, the predetermined valve is opened and closed for mud water shield construction method. Consequently, since mud water and water do not flow out when the pipes are separated, it is possible to eliminate water recovery work, cleaning work, and a hindrance by water of an excavator.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for extending a pipe for excavating a tunnel such as a road or a railroad by using a muddy pressure shield method.

[0002]

2. Description of the Related Art In order to excavate a tunnel by using a muddy pressure shield method, it is necessary to sequentially extend a muddy pipe and a muddy pipe. The present applicant has proposed a device for use in extending a mud feeding pipe and a drain pipe as Utility Model Registration No. 304697.

An outline of the registered utility model will be described with reference to FIG. The mud feed pipe 1 includes a mud feed pipe 3 connected to a mud feed device 2, a mud feed pipe 4 connected to the mud feed pipe 3, and sequentially extended along with excavation, and a mud feed extension. A mud feed moving pipe 6 connected to the pipe 4 and placed on a carriage 5 is connected to the excavating device 8 via a pipe expansion / contraction device 7.

[0004] The sludge discharge pipe 9 is connected to an excavator 8 via a pipe expansion / contraction device 7 and is mounted on a carriage 5.
0, the sludge extension pipe 11 connected to the sludge transfer pipe 10
And a sludge source pipe 12 connected to the sludge extension pipe 11. The sludge source pipe 12 is connected to a sludge treatment device 13.

The mud feed pipe 3 and the drain pipe 12 are provided with vertical shaft valves V1 and V2, respectively, and branch pipes 3A and 3B connected upstream and downstream of the vertical shaft valve V1 and a vertical shaft valve V2.
Valves V3, V4, V5 are interposed in the branch pipe 12A connected to the upstream side of the pipe. And branch pipe 3
A, 3B and 12A are connected to a drain pipe 15 via a common pipe 14, and the common pipe 14 is provided with a valve V6.

[0006] Knife gate valves V7 and V8 are provided on the mud feeding moving pipes 6 and 10, respectively. The branch pipe 6A connected to the upstream side of the knife gate valve V7 and the branch pipe 10A connected to the downstream side of the knife gate valve V8 are connected via water pipes 16 and 17, respectively.
It is connected to submersible pumps 19 and 20 in a water storage tank 18.

Each of the water pipes 16 and 17 has a valve V
9, V10 is interposed. In addition, water pipes 16 and 17
The drain pipes 21 and 22 respectively connected to the water storage tank 1
8 and valves V11 and V12 are interposed in each.

Pigs 23 and 24, which are movable pipe closing devices, are slidably inserted into the branch pipes 6A and 10A. Then, in the branch pipes 6A and 10A, the pig 2
Plate valves V13 and V14 are interposed on the ground side (right side in FIG. 3) with respect to 3, 24. The water storage tank 18 is provided with a level switch 25 for measuring the liquid level and a water supply valve 26.

In the above-described apparatus, the muddy water sent from the mud feeder 2 is sent to the excavator 8 via the mud feeder pipe 3, the mud feeder extension pipe 4, the mud feeder pipe 6, and the pipe expansion / contraction device 7. The tunnel is excavated by the muddy pressure shield method. The muddy water discharged from the excavator 8 is sent to the sludge treatment device 13 via the pipe expansion / contraction device 7, the sludge moving pipe 10, the sludge extension pipe 11, and the sludge source pipe 12.

In the tunnel excavation mode as described above, when a predetermined length determined by the pipe expansion and contraction device 7 is excavated by the excavation device 8, the mud feeding extension pipe 4 and the mud extension pipe 11 are extended. There is a need. At the time of this extension, the pig 23 is moved to the mud feeding extension pipe 4 and the pig 24 is moved to the drainage extension pipe 11.
To prevent muddy water from flowing out.

When moving the pigs 23 and 24, first, the shaft valve V1 and the knife gate valve V7 are closed, the valves V4, V6, V9 and the plate valve V13 are opened, and the pump 19 is driven to drive the water in the water storage tank 18. The water is sent to the water pipe 16. As a result, the pig 23 in the branch pipe 6A moves into the mud feed moving pipe 6.

With the movement of the pig 23, the muddy water in the mud feeding moving pipe 6 is changed into a mud feeding extension pipe 4, a mud feeding pipe 3, and a branch pipe 3.
B, and is discharged to the drain pipe 15 through the common pipe 14.
Then, it is confirmed whether or not the pig 23 has moved into the mud feeding pipe 4 based on the amount of water measured by the level switch 25. When it is confirmed that the pig 23 has moved into the mud feeding pipe 4, the valves V4, V6, V9 and the plate valve V
13 is closed.

Next, the shaft valve V2 and the knife gate valve V8 are closed, and the valves V5, V6, V10, and the
The valve V14 is opened. When the pump 20 is driven to send the water in the water storage tank 18 to the water supply pipe 17, the branch pipe 1
The pig 24 in 0A moves toward the sludge moving piping 10.

As the pig 24 moves, the mud in the sludge moving pipe 10 is discharged to the drain pipe 15 through the sludge extension pipe 11, the sludge source pipe 12, the branch pipe 12A, and the common pipe 14. . When it is confirmed from the water amount measured by the level switch 25 that the pig 24 has moved into the sludge extension pipe 11, the valves V5, V6, V10 and the plate valve V
Close 14.

If the pig 23 is moved to the sludge extension pipe 4 and the pig 24 is moved to the sludge extension pipe 11, the sludge transfer pipe 6 is moved from the sludge extension pipe 4 to the sludge extension pipe. Separate the sludge transfer pipe 10 from 11, move the carriage 5, connect the separate sludge extension pipe to the sludge extension pipe 4, and connect the separate sludge extension pipe to the sludge extension pipe 11. . The sludge transfer pipe 6 is connected to the sludge transfer pipe 4, and the sludge discharge pipe 1 is connected.
1 is connected to a sludge transfer pipe 10.

When returning the pig 23 to the branch pipe 6A and returning the pig 24 to the branch pipe 10A, the valves V3, V4, V
5, V11, V12 and plate valves V13, V1
Open 4. Then, the pig 23 is moved into the branch pipe 6A by the muddy water sent from the mud feeding device 2, and the pig 24 is moved to the branch pipe 10A.
Move into A. And the water in the branch pipe 6A is drained pipe 2
1 and collected in the water storage tank 18 through the branch pipe 10A.
The water inside is collected in the water storage tank 18 through the drain pipe 22.

The pig 23 returns into the branch pipe 6A, and the pig 24
Return to the branch pipe 10A, the valves V3, V4,
V5, V11, V12 and plate valves V13, V
Close 14.

Finally, the shaft valves V1 and V2 and the knife gate valves V7 and V8 are opened, and the excavation of the tunnel by the excavator 8 is resumed. When the water in the water storage tank 18 becomes low, the water supply valve 26 is opened to replenish the water.

However, in the prior art, since the pig is moved by water, water flows out of the pit when the pipe is disconnected, and it is necessary to collect this water by a vacuum pump or the like. In particular, in a shield tunnel with a down slope, the water flows into the inside of the excavator, which may hinder the excavation work.

There is also a problem that it is necessary to extend a water supply hose and manually supply water to a water storage tank.

[0021]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned problems in the prior art, and is used when extending a pipe for excavating a tunnel by a muddy pressure shield method. The purpose of the present invention is to provide a method and an apparatus for extending a pipe, which can eliminate outflow of water at the time of pipe disconnection by moving a pig without using water, and can eliminate a problem of water recovery work and water of an excavator. I have.

[0022]

According to the present invention, there is provided a method of extending a pipe, which is used for extending a pipe when a tunnel is excavated by a muddy pressure shield method.
A mud feed pipe connected to the mud feed device, a mud feed extension pipe connected to the mud feed pipe, and a mud feed pipe connected to the mud feed extension pipe and connected to the drilling rig via a pipe expansion / contraction device. Moving plumbing,
A sludge transfer pipe connected to the excavator via a pipe expansion / contraction device, a sludge extension pipe connected to the sludge transfer pipe, and a drainage pipe connected to the sludge extension pipe and connected to the sludge treatment device. A branch pipe containing a movable pipe closing device is connected to the mud feeding pipe and the mud pipe, and the branch pipe is connected to an air feeding means. Moving the movable pipe obturator to the mud extension pipe and the mud extension pipe by connecting a separate mud extension pipe to the mud extension pipe;
Connecting a separate wastewater extension pipe to the wastewater extension pipe;
Returning the movable pipe closing tool to the branch pipe.

The pipe extending apparatus of the present invention is a pipe extending apparatus used for extending a pipe when a tunnel is excavated by a muddy water pressurizing shield method. A mud pipe, a mud extension pipe connected to the mud pipe, a mud moving pipe connected to the mud extension apparatus connected to the mud extension pipe, and a pipe expansion and contraction apparatus via a pipe expansion and contraction apparatus. A sludge moving pipe connected to the excavator via a sludge moving pipe, a sludge extension pipe connected to the sludge moving pipe, and a sludge source pipe connected to the sludge extending pipe and connected to the sludge treatment apparatus. Has,
A branch pipe containing a movable pipe closing device is connected to the sludge transfer pipe and the sludge transfer pipe, and the branch pipe is connected to an air supply means, and the branch pipe, the sludge transfer pipe, and the sludge transfer pipe are connected. Is provided with a sensor for detecting a movable pipe closing device.

According to the present invention having such a configuration, since the pig is moved by the air from the air supply means, the outflow of water at the time of disconnection of the pipe is eliminated, and the trouble of the water recovery work and the water of the excavator is eliminated.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Note that the same members as those in the conventional technique described with reference to FIG.

In the pipe extending apparatus shown in FIG. 1, a mud feed pipe 1 is connected to a mud feed apparatus 2 and a mud feed pipe 3 is connected to the mud feed pipe 3 and sequentially extends along with excavation. And a mud feeding moving pipe 6 connected to the mud feeding pipe 4 and placed on a truck 5.

The mud feeding pipe 6 is connected to an excavator 8 via a pipe expansion / contraction device 7. The sludge discharge pipe 9 is connected to the excavator 8 via the pipe expansion and contraction device 7 and is mounted on the bogie 5, the sludge discharge pipe 11 connected to the sludge transfer pipe 10, A sludge source pipe 12 is connected to a sludge extension pipe 11, and the sludge source pipe 12 is connected to a sludge treatment device 13.

Each of the feed pipe 3 and the feed pipe 12 is provided with vertical shaft valves V1 and V2, and a branch pipe 3A connected to the ground side (right side in FIG. 1) of the vertical shaft valve V1 has a valve V3. The branch pipe 3B connected to the face side (left side of FIG. 1) of the shaft valve V1 is provided with a valve V4, and the branch pipe connected to the face side (left side of FIG. 1) of the shaft valve V2. A valve V5 is interposed in the pipe 12A. The branch pipes 3A, 3B, 12A are connected to a drain pipe 15 via a common pipe 14, and the common pipe 14 is provided with a valve V6.

A knife gate valve V
7 are provided. The branch pipe 6A connected to the upstream side of the knife gate valve V7 is connected to an air source 31 as an air supply means via an air supply pipe 30, and the air supply pipe 30 is provided with an exhaust valve V20 and a valve V21. Have been. Although an air compressor is used as the air source 31, an air cylinder or another cylinder may be used.

A plate valve V is connected to the branch pipe 6A.
13 is interposed, and a pig 23 which is a movable pipe closing device is provided.
It is inserted in a slidable manner. Further branch pipe 6
A is provided with a pig detection sensor S1 for detecting the pig 23. In addition, the pig 2
A pig passage sensor S2 for detecting that the slide 3 has passed is provided.

Similarly, the drainage moving pipe 10 has a knife gate.
A valve V8 is provided. Knife gate valve V
8 is connected to an air source 31 serving as an air supply means via an air supply pipe 32,
2 is provided with an exhaust valve V22 and a valve V23. A plate valve V14 is interposed in the branch pipe 10A, and a pig 24, which is a movable pipe closing device, is housed in a slidable state. Further, the branch pipe 10A is provided with a pig detection sensor S3 for detecting the pig 24. In addition, a pig passage sensor S4 for detecting that the pig has slid and passed is provided at an end of the mud feeding moving pipe 10.

Although not clearly shown in FIG. 1, each valve and each sensor are electronically connected to the control device 3 via signal lines.
The control device 33 receives signals from various sensors, detects the positions of the pigs 23 and 24, and performs necessary control such as outputting an open / close signal to the valves. It is configured to output an open / close control signal. However, an operator can be arranged instead of the control device 33.

In the apparatus as described above, the mud feeder 2
Muddy water is sent through a mud feed pipe 3, a mud feed extension pipe 4, a mud transfer pipe 6, and a pipe expansion / contraction device 7,
The tunnel is excavated by the muddy pressure shield method. The muddy water discharged from the excavator 8 is sent to the sludge treatment device 13 via the pipe expansion / contraction device 7, the sludge moving pipe 10, the sludge extension pipe 11, and the sludge source pipe 12.

In the tunnel to be excavated in this way, when a predetermined length determined by the pipe expansion and contraction device 7 is excavated by the excavation device 8, the mud feeding extension pipe 4 and the mud extension pipe 11 are extended. . This extension is performed after the pig 23 is moved to the mud feeding extension pipe 4 and the pig 24 is moved to the mud drain extension pipe 11 to suppress outflow of muddy water or slurry.

Next, the extension operation will be described with reference to FIG. When extending the mud feeding pipe 4 and the mud pipe 11 (YES in step ST1), the controller 3
3, the shaft valves V1 and V2 and the knife gate valves V7 and V8 are closed, the plate valves V13 and V14 are opened (step ST2), and the valves V4 and V6 are opened.
The valves V3 and V5 are closed (step ST3).

Then, the valve V21 is opened, and the valve V21 is opened.
23 and the exhaust valves V20 and V22 are closed to drive the compressor 31 as an air source (step ST4). At the stage when step ST4 is completed, the compressor 3
1. A pressure air circuit of an air supply pipe 30, a branch pipe 6A, a mud transfer pipe 6, a mud extension pipe 4, a branch pipe 3B, a common pipe 14, and a drain pipe 15 is formed, and branched by air pressure from the compressor 31. The pig 23 in the pipe 6A moves toward the mud feeding moving pipe 6. This state continues until the pig passage sensor S2 detects passage of the pig 23 (NO in step ST5).

If the pig passage sensor S2 detects the passage of the pig 23 (YES in step ST5), the valve 21
Is closed, and the exhaust valve V20 is opened to release air (step ST6). Thus, the movement of the pig 23 into the mud feeding moving pipe 6 is completed.

Next, the pig 24 is moved into the mud feeding pipe 10. First, the valves V5 and V6 are opened, the valves V3 and V4 are closed (step ST7), and the valve V2
3 is opened, and the exhaust valves V20 and V22 are closed (step ST8).

At the stage when step ST8 is completed,
A pressure air circuit of the compressor 31, the air supply pipe 32, the branch pipe 10A, the sludge moving pipe 10, the sludge extension pipe 11, the branch pipe 12A, the common pipe 14, and the drain pipe 15 is formed. Pig 24 in branch pipe 10A
Moves toward the sludge moving piping 10. This state continues until the pig passage sensor S4 detects passage of the pig 24 (NO in step ST9).

If the pig passage sensor S4 detects passage of the pig 24 (YES in step ST9), the compressor 31 is stopped, the valve 23 is closed, and the exhaust valve V22 is closed.
Is released to release air (step ST10).
Thereby, the movement of the pig 24 into the sludge moving pipe 10 is completed.

By moving the pig 23 into the mud feeding moving pipe 6 and controlling the valve opening and closing as described above, the muddy water on the mud feeding moving pipe 6 side is turned into the mud feeding extension pipe 4, the mud feed pipe 3, and the branch. The water is discharged to the drain pipe 15 via the pipe 3B and the common pipe 14. On the other hand, by moving the pig 24 into the sludge moving pipe 10 and controlling the opening and closing of the valve as described above, the muddy water on the sludge moving pipe 10 side is turned into the sludge extension pipe 11 and the sludge source pipe 1.
2, drain pipe 15 through branch pipe 12A and common pipe 14
Is discharged to In this state, pipe extension work is performed (step ST11 and step ST12 are NO loop).

When the pipe extension work is completed (YES in step ST12), the pig 23 in the sludge transfer pipe 6 is returned to the branch pipe 6A again, and the pig 23 in the sludge transfer pipe 10 is returned.
Must be returned to the branch pipe 10A again.

First, to return the pig 23 to the inside of the branch pipe 6A, the exhaust valve V20 and the valves V3 and V4 are opened (step ST13). As a result, the mud feed pipe 3 and the branch pipe 3
A, a common pipe 14, a branch pipe 3B, a mud feed extension pipe 4, a mud feed moving pipe 6, a branch pipe 6A, and an air feed pipe 30 constitute a muddy water circuit.
Is pressed into the branch pipe 6A from step (step ST14 is N
O loop).

The pig 23 moves until it comes into contact with the step at the boundary between the branch pipe 6A and the air supply pipe 30, and is detected by the pig detection sensor S1 (YES in step ST14).
At this stage, the operation of returning the pig 23 into the branch pipe 6A is completed.

Next, in order to return the pig 24 into the branch pipe 10A, the exhaust valve V20 and the valve V4 are closed, and the exhaust valve V2 is closed.
2 and valves V3 and V5 are opened (step ST1).
5). As a result, the mud feed pipe 3, the branch pipe 3A, the common pipe 1
4, branch pipe 12A, sludge extension pipe 11, sludge transfer pipe 1
0, a branch pipe 10A, and an air supply pipe 32 constitute a muddy water circuit, and the pig 24 is pressed from the sludge transfer pipe 10 into the branch pipe 10A by the pressure of the muddy water (N in step ST16).
O loop).

The pig 24 moves until it comes into contact with the step at the boundary between the branch pipe 10A and the air supply pipe 32. At this time, the pig 24 is detected by the pig detection sensor S3 (step ST16 is YE).
S). Thus, the operation of returning the pig 24 to the inside of the branch pipe 10A is completed.

When the pigs 23 and 24 return to the branch pipes 6A and 10A, respectively, the valves V3 and V5 and the exhaust valve 22
Is closed (step ST17). Then, the plate valves V13 and V14 are closed to close the branch pipes 6A and 10A, and the knife gate valves V7 and V8 and the shaft valves V1 and V2 are opened (step ST18). Hereinafter, a normal muddy water shield construction method is performed.

Although the opening and closing of each valve is controlled by the control device 33, they may be manually performed as described above. Further, as the opening / closing means, a shutter may be used instead of the various valves.

It should be noted that the illustrated embodiment is merely an example, and is not intended to limit the technical scope of the present invention.

[0050]

As described above, according to the present invention, since the pig is moved by the air from the air supply means, there is no muddy water or water outflow when the pipe is disconnected, so that the water collecting work and the cleaning work can be performed. The hindrance of the drilling rig water is eliminated. Further, air can be supplied from an air source mounted on the bogie, and there is no need to provide a water supply facility. The electric power required to operate the compressor, which is an air source, can be shared with other electric devices.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a pipe extending apparatus and an extending method for excavating a tunnel by a muddy pressure shield method according to the present invention.

FIG. 2 is a flow chart of a pipe extension apparatus and a pipe extension method for excavating a tunnel by a muddy pressure shield method according to the present invention.

FIG. 3 is a configuration diagram of a conventional pipe extension device for excavating a tunnel by a muddy pressure shield method.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Mud feed pipe 2 ... Mud feed device 3 ... Mud feed source pipe 4 ... Mud feed extension pipe 5 ... Truck 6 ... Mud feed moving pipe 7 ... Pipe expansion and contraction Apparatus 8: Excavator 9: Exhaust pipe 10: Exhaust transfer pipe 11: Exhaust extension pipe 12: Exhaust pipe 13: Exhaust treatment apparatus 14・ Common pipe 15 ・ ・ ・ Drain pipe 16,17 ・ ・ ・ Water pipe 18 ・ ・ ・ Storage tank 19,20 ・ ・ ・ Submersible pump 21,22 ・ ・ ・ Drain pipe 23,24 ・ ・ ・ Pig 25 ・ ・ ・Level switch 26: Water supply valve 30, 32: Air supply pipe 31: Air source 33: Control device V1, V2: Vertical valve V3, V4, V5, V6, V9, V10, V11, V1
2, V21, V23: Valve V7, V8: Knife gate valve V13, V14: Plate valve V20, V22: Exhaust valve S1, S3: Pig detection sensor S2, S4: Pig Passage sensor

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroshi Sato 1-8-23-202 Higashinakahama, Joto-ku, Osaka-shi, Osaka F-term (reference) 2D054 AC05 DA12

Claims (2)

[Claims] 1. A method for extending a pipe used for extending a pipe when a tunnel is excavated by a muddy water pressure shield method, comprising: a mud feed pipe connected to a mud feeder; and a mud feed pipe. Mud feed pipe connected to the mud feed pipe, mud feed pipe connected to the mud feed apparatus connected to the mud feed apparatus via the pipe extender, and drainage pipe connected to the excavator via the pipe extender. A mud moving pipe, a mud extension pipe connected to the mud moving pipe, and a mud source pipe connected to the mud extending pipe and connected to the sludge treatment device; A branch pipe containing a movable pipe blockage is connected to the sludge transfer pipe,
The branch pipe is connected to an air supply means, and a step of moving the movable pipe closing device to a mud extension pipe and a mud extension pipe by the air supply means; Connecting the mud extension pipe, connecting a separate mud extension pipe to the mud extension pipe, and returning the movable pipe closing device to the branch pipe. Installation method. 2. A pipe extension device used for extending a pipe when a tunnel is excavated by a muddy water pressure shield method, comprising: a mud feed pipe connected to a mud feed apparatus; and a mud feed pipe. Mud feed pipe connected to the mud feed pipe, mud feed pipe connected to the mud feed apparatus connected to the mud feed apparatus via the pipe extender, and drainage pipe connected to the excavator via the pipe extender. A sludge transfer pipe having a mud transfer pipe, a sludge extension pipe connected to the sludge transfer pipe, and a sludge source pipe connected to the sludge extension pipe and connected to a sludge treatment device; A branch pipe containing a movable pipe closing device is connected to the sludge transfer pipe, and the branch pipe is connected to an air supply means, and a mobile pipe is connected to the branch pipe, the sludge transfer pipe, and the sludge transfer pipe. An apparatus for extending a pipe, comprising a sensor for detecting an obturator.