JP3366241B2 - Underground pipe laying method and apparatus - 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 laying a buried pipe and a device for laying a buried pipe in a simple and low cost manner.

[0002]

2. Description of the Related Art Conventionally, when laying a buried pipe in the ground,
The propulsion device is buried from the starting point to the propulsion pipe in a predetermined section by the propulsion device, that is, until reaching the reaching point, and the propulsion pipe body containing various devices reaching the reaching point is pulled out into the reaching point. Have been taken to the ground.

However, depending on the conditions of the construction site, if the sufficient space cannot be secured for this reach, or if the buried pipe is to reach an existing manhole with a small diameter, the above-mentioned propulsion pipe is pulled out into this reach pit. Therefore, construction under these conditions could not be carried out.

Alternatively, in the construction under these conditions, when the propulsion pipe reaches the reaching shaft, the propulsion pipe is gradually extruded into the reaching shaft and melted to a size capable of being removed. Then, it was taken out to the ground, and then the leading end of the buried pipe was made to correspond to the wall of the reaching hole.

Furthermore, in order to leave the propulsion pipe at that position and make it the same surface as the inner diameter of the buried pipe, it was wound with concrete or the like.

However, in the former construction, when the buried pipe is melted and taken out, a part of various excavating equipment such as a cutter for excavation and a drive motor therefor, an earth discharging device, and a direction correcting device are provided. Or they are all cut together and cannot be reused efficiently in the next construction.

In particular, since this excavation pipe contains relatively expensive equipment, damage and destruction of these equipment will cause a significant increase in construction cost, and the work will be troublesome and the construction period will be extended. .

Furthermore, when the latter propulsion pipe is left and wound with concrete, when the work is completed,
The strength or surface finish of the buried pipe is apt to be inferior, and the reliability in terms of durability and the like is deteriorated. Moreover, as in the former case, the construction cost rises and the construction period is extended. There were various problems such as.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has an inner diameter larger than the outer diameter of a buried pipe, and is suitable for excavating means, soil removal, etc. When the propulsion pipe containing the propulsion necessary means reaches the reaching shaft, the propulsion necessary means such as the excavating means and the earth removal in the propulsion pipe are removed from the reaching shaft or the starting pit, and the propulsion pipe and After releasing the connection with the foremost buried pipe, the propulsion means further propels the buried pipe up to the ultimate resistance, and by embedding the propulsion pipe body together with this buried pipe in the ground, a space with sufficient ultimate resistance is created. It is an object of the present invention to provide a underground buried pipe laying method and apparatus capable of performing smooth and reliable intubation construction even when the buried pipe is not provided or when it reaches an existing human hole having a small diameter.

[0010]

The means of the present invention for achieving the above-mentioned object has an inner diameter larger than the outer diameter of the buried pipe, and is provided with means for propulsion such as excavation means and earth removal. A built-in propulsion pipe is connected to the head of the buried pipe, and is propelled by the propulsion means through the buried pipe to lay a buried pipe of a predetermined length in the ground. When laying a buried pipe in the section and the leading propulsion pipe reaches the reaching resistance, the excavation means and the required means for excavation such as earth removal in the propulsion pipe have been reached or laid. After removing from the starting pit through the buried pipe and disconnecting the propulsion pipe and the frontmost buried pipe, the propulsion means further propels the buried pipe to the reaching resistance, and the propulsion pipe together with the buried pipe. It is a method of laying underground pipes that are buried underground.

Further, in the underground pipe burying in which the propulsion pipe is connected to the head of the buried pipe and is propelled by the propulsion means through the buried pipe to lay a buried pipe of a predetermined length in the ground, The propulsion pipe body has an inner diameter larger than the outer diameter of the buried pipe, and means for propulsion such as excavation means and earth removal built therein are detachably provided by fastening means. The propulsion pipe, after releasing the connection between the propulsion pipe and the foremost buried pipe,
The embedded pipe is further propelled to the ultimate resistance by the propulsion means, and the embedded pipe is inserted into the propulsion pipe body. The propulsion pipe body is used as a sheath pipe or a base pipe buried in the ground. In the structure of the underground pipe laying device.

[0012]

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a method for laying a underground buried pipe and an apparatus therefor according to the present invention will be described with reference to the drawings.

In FIG. 1, A is an underground pipe laying device,
The propulsion pipe body 1 is connected to the head of the buried pipe 2, and the buried pipe 2
It is used for burying a buried pipe 2 of a predetermined length, which is propelled by a propelling means 4 such as a hydraulic jack installed in a start pit 3 via a propulsion pipe body 1, Basically, the means 5 for propulsion and the fastening means 6 are used.

The above-mentioned propulsion pipe body 1 is cylindrical and has a pipe member 7 formed in a predetermined length and has an inner diameter larger than the outer diameter of the embedded pipe 2, that is, the embedded pipe 2 propels it. When it is inserted into the inside of the pipe body 1, it becomes a sheath shape, and inside this, there are built-in propulsion necessary means 5 such as excavation means and earth removal, and these individual propulsion necessary means 5 are bolts and nuts. It is detachably provided so that it can be separated by the fastening means 6 such as.

The propulsion-requiring means 5 is an excavation means 5c in which a large number of cutter bits 5b are attached to a rotating body 5a corresponding to the excavation ground, a hydraulic motor or an electric motor for rotationally driving the excavation means 5c, and a speed reducer. Is a device necessary for attaching the buried pipe 2 such as the drive system 5d, the direction correction hydraulic jack 5e, the excavated soil discharging device 5f, and the mud sending device 5g.

Further, the propulsion pipe body 1 has a pipe member 7 on the outer periphery.
A small tube member 7 in which a plurality of parts are formed in the longitudinal direction.
a, 7b, 7c ... 7n, and these members 7a
.. 7n are formed so that they can be disassembled and assembled by abutting or joining by a face plate 8, and further by joining them in a cage-like manner and fixing means 6 such as bolts and nuts, or connection by a direction correcting hydraulic jack 5e. There is.

A space-shaped excavation chamber 9 is formed between the face plate 8 serving as a partition wall and the excavation means 5c inside the front side of the propulsion pipe 1. Muddy water generated from the ground is mixed with excavated sediment,
The water is accumulated in the excavation chamber 9, and muddy water and excavated soil are appropriately discharged rearward from the discharge hole 12 provided in the face plate 8 by the discharge device 5f.

Further, the liquid feeding operation from the ground is performed by operating a switching valve (not shown) at the liquid feeding port 11 provided on the face plate 8, and a liquid feeding means (not shown) is connected to each of them. There is.

Thus, by pumping the liquid to the ground portion to be excavated, the ground excavation and the intubation lubrication action are performed in cooperation with the excavation means 5c and the like. The earth pressure and groundwater pressure are maintained in a well-balanced condition, and they are managed in the propulsion pipe 1 or on the ground based on information from a face pressure gauge (not shown) installed in the proper place of the excavator. And controlled.

The above-mentioned liquid supply port 11 has the rotating body 5a.
It is installed on the outer periphery of a suitable place of the rotating body 5 for excavation and intubation.
While a is rotating, the muddy water adjusted to have a predetermined viscosity is pressure-fed from the liquid feed port 11, whereby a tail void s is formed between the outer peripheral portion of the pipe member 7 and the ground. Reduced and smooth pipe propulsion is performed.

Further, if the muddy water is pressure-fed to the outer peripheral portion of the pipe member 7 at a plurality of intervals in the longitudinal direction, the tail voids can be more effectively promoted.

The frontmost buried pipe 2 connected to the rear portion of the propulsion pipe 1 is, as shown in FIGS. 2 and 5, a receiving member attached to the rear end of the propulsion pipe 1 by a fastening means 6. It is supported by 13 and prevents the embedded pipe 2 from entering the propulsion pipe body 1 during the intubation by the propulsion means 4.
After completion of the intubation, the receiving member 13 is removed by operating the fastening means 6, so that the embedded pipe 2 can enter the pipe member 7 by the intubation by the propulsion means 4.

Further, the connection configuration will be described in detail.
The joining member 20 is attached to the small pipe member 7e of the pipe member 7 with a detachable fastening member 6 such as a bolt, and the receiving member 13 is attached to the joining member 20 with a detachable fastening member 6 such as a bolt.
Is attached, and the front end of the foremost embedded pipe 2 is inserted into the mounting portion 22 with the stopper piece 21 provided inside the rear end of the receiving member 13.

The joining member 20 and the receiving member 13 (these members may be further subdivided if necessary) are installed from the pipe member 7 to the fastening member 6 after the installation of the buried pipe 2 is completed. Although it is removed, at the time of intubation, the water-stopping action of the tail void material and the groundwater propelling pipe 1 and the buried pipe 2 caused by muddy water or the like formed on the outer peripheral portion of the propelling pipe 1 or the buried pipe 2 Water stop means 2 having
3, 24 are provided.

Of these, the water stopping means 23 is the small pipe member 7e.
The seal portion is attached to the inner peripheral portion of the contact member and is in contact with the outer peripheral surface of the receiving member 13, so that water leakage from the joint surface between the connecting member 20 and the receiving member 13 is prevented.

Further, the water stopping means 24 is attached to the outer peripheral portion of the foremost buried pipe 2, abuts against the inner peripheral surface of the receiving member 13, and leaks water from the joint surface between the stopper piece 21 and the front end portion of the buried pipe 2. Is prevented.

Therefore, the underground buried pipe laying method and the apparatus A thereof according to the embodiment of the present invention configured as described above have the following effects.

To the front part of the leading buried pipe 2, the excavation body 1 having the excavation means 5c attached to the front side thereof is fixed, and the starting pit 9 is attached.
In Fig. 1, when the excavation means 5c is driven while propelling the buried pipe 2 into the ground by the propulsion means 10, rocks, earth and sand, etc. in the ground in front of the excavation means 5c are transferred to the rotating body 5a. The cutter bit 5b is provided to excavate, and the excavating means 5f sequentially ejects the excavated soil to the rear.

At this time, in the front cutting portion of the cutter bit 5b and the excavation chamber 9, the muddy water supplied from the liquid supply port 11 is uniformly mixed with the excavated earth and sand to form a liquid material. While the body forms a mud film on the front face of the cutter bit 5b, the intubation proceeds with the tail voids filled with the mud film formed between the pipe member 7 and the outer ground.

In this way, when the embedded pipe 2 is connected to the rear portion of the propulsion pipe 1 and the propulsion pipe 1 at the leading end reaches the arrival resistance 15 such as an existing human hole by the intubation by the propulsion means 4, the intubation is stopped. .

Then, the excavation means 5c in which a large number of cutter bits 5b are attached to the rotary body 5a, which is the propulsion necessary means 5 installed inside the propulsion pipe 1, and the excavation means 5 are provided.
As shown in Fig. 4 (a), the hydraulic motor 5d for rotationally driving c, the hydraulic jack 5e for direction correction, the device 5f for excavating soil, the device necessary for attaching the buried pipe 2 such as the mud sending device 5g, etc. In addition, it is separated from the pipe member 7 in sequence by operating the fastening means 6 such as bolts and nuts, and then sequentially removed and collected on the ground. This work is carried out from the reaching tool 15 or through the inside of the laid buried pipe 2. It is removed from the start pit 3.

When it is recovered from the start pit 3, it is convenient to place it on the unloading carriage 26 that travels in the buried pipe 2 and carry it on it.

These propulsion necessary means 5 can be reused in the next intubation work, effective use of the equipment can be achieved, and the reuse of expensive equipment can reduce the cost of the intubation work.

The receiving member 13 provided on the rear side of the pipe member 7
Also, the embedded pipe 2 is detached by operating the fastening means 6.
The tube member 7 is ready for insertion.

Thus, when the pipe member 7 has no internal components, when the propulsion means 4 starts the intubation again, as shown in FIG. 4 (b), the inner diameter of the buried pipe 2 is larger than the outer diameter thereof. Is inserted into the above-described pipe member 7, and finally the innermost wall surface of the reaching groove 15 corresponds to the frontmost edge of the embedded pipe 2.

As a result, the work of pulling out the propulsion pipe 1 from the ground is completely unnecessary, and it is not possible to secure a sufficient space for the reaching tool 15, or even if the existing human hole 15 with a small diameter is used,
The buried pipe 2 can be laid regardless of these spaces.

In addition, at the intubation opening of the reaching arm 15,
By embedding the pipe member 7 remaining in the ground as it is, it becomes a sheath pipe or a mouthpiece of the buried pipe 2, effectively works for the ground stability of the opening portion, and the buried pipe 2 which is easily exposed to the outside air at the reaching resistance 15. The buried pipe 2 can be protected by exteriorizing the.

The tubular member 7 is divided into a plurality of small tubular members 7a, 7b, 7c ...
7n, the propelling means 4 presses the buried pipe 2 while the receiving member 13 provided on the rear side of the pipe member 7 is still attached, and a part of the pipe member 7 reaches the reaching hole 15 Since it faces the inside, if the connection by the fastening means 6 and the like is released, the small tube members 7a, 7b, 7c ... 7n can also be divided and recovered, and the member 7 can be reused during this time.

After the pipe member 7 is removed, a filling material such as concrete is embedded around the embedded pipe 2 to stabilize the embedded pipe 2.

[0041]

According to the present invention constructed as described above, the propulsion pipe is connected to the head of the buried pipe and propelled by the propulsion means through the buried pipe, and the buried pipe having a predetermined length in the ground. In the underground pipe laying, the propulsion pipe body has an inner diameter larger than the outer diameter of the buried pipe, and the propulsion necessary means such as excavation means and earth removal fixed therein is fixed. By means of being detachably provided by means, after the completion of the intubation, the propulsion necessary means provided in the propulsion pipe can be smoothly removed by the fastening means so that the propulsion necessary means can be reused for the next intubation work. As a result, it is possible to effectively use the means required for pipe promotion and to significantly reduce the construction cost.

Since welding and gas cutting are not used for attaching / detaching the propulsion-requiring means to / from the pipe member, the work can be carried out safely, and the equipment is prevented from being damaged due to welding flames, sparks or ignition. can do.

Since the pipe member can be buried in the ground, the process for taking out the pipe body can be omitted, the construction period can be shortened and the construction cost can be reduced. It is obtained and the strength is improved. It has special effects such as.

[Brief description of drawings]

FIG. 1 is an explanatory view schematically showing a propulsion device adopting a method of laying a buried underground pipe according to the present invention.

FIG. 2 is an enlarged cross-sectional view showing a propulsion pipe body in FIG.

FIG. 3 is a side view of FIG.

4 is an explanatory view showing a laid state of the buried pipe in FIG. 1. FIG.

5 is a cross-sectional view showing an enlarged part X in FIG.

[Explanation of symbols]

1 propulsion tube 2 buried pipe 3 start pits 4 promotion means 5 promotion necessary means 6 fastening means 15 Reach

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Claims (2)

(57) [Claims] 1. A propulsion pipe body having an inner diameter larger than the outer diameter of the buried pipe and including a means for propulsion such as excavation means and earth removal is connected to the head of the buried pipe, When laying a buried pipe of a specified length in the ground by propelling means through a buried pipe, laying a buried pipe in a specified section, and the leading propulsion pipe body reaches When the road is reached, the excavation means and the means for propulsion such as earth removal in the propulsion pipe are removed from the starting pit through the reaching pipe or the buried pipe laid, and the propulsion pipe and the frontmost buried pipe are After terminating the connection, the burying pipe is further propelled by the propelling means to the reaching resistance, and the propulsion pipe body is buried in the ground together with the burying pipe. 2. A subterranean pipe burial in which a propulsion pipe is connected to the head of a buried pipe and is propelled by propulsion means through the buried pipe to lay a buried pipe of a predetermined length in the ground. the propulsion tube body has a larger diameter inner diameter than the outer diameter of the buried pipe, and each other to provide a propulsion means necessary drilling means and dumping or the like incorporated in the internal detachably by fastening means, the The propulsion pipe should be connected to the foremost buried pipe.
After releasing, the buried pipe is further
Push this buried pipe into the propulsion pipe body by propelling it to the ultimate resistance.
A sheath in which this propulsion tube is embedded and buried in the ground.
Underground pipe laying device characterized by using pipes and caps .