JPH07301368A - Underground pipe laying method - Google Patents

Abstract

PURPOSE:To provide a pipe laying method whereby a pipe can be efficiently pressed in without using a spacer to eliminate wasteful time and labor for spacer insertion and removal, to reduce a number of workers and to improve safety, when the pipe is pressed in by a hydraulic jack in a horizontal direction, when a pipe line is newly laid or when a new pipe is laid in an old pipe. CONSTITUTION:A hydraulic jack 12 is formed in a type delivering several steps of short rams 13. A stroke of the ram longer than a standardized pipe P is used. The single standardized pipe P is pressed into an old pipe P0 by a series of press in action by a hydraulic jack 12. Next, the ram 13 of delivery type is all contracted, to connect the next standardized pipe P to a rear end of the standardized pipe P pressed in before, and to interpose a seal material in a joint of the pipes before and after, so that similarly to the preceding time, the ram 13 of the hydraulic jack 12 is extended to press in the standardized pipe P. In this way, a pipe line is newly efficiently formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a propulsion piping method for reinforcing existing water and sewer pipes by inserting new pipes into existing water and sewer pipes when they are deteriorated. The present invention also relates to a propulsion piping method for newly laying a water supply pipe, a sewer pipe, a communication line laying pipe, or the like.

[0002]

2. Description of the Related Art Ductile pipes, hard vinyl chloride pipes, steel pipes, asbestos cement pipes, etc. are used as typical pipes laid when servicing water and sewer pipes. Is an excavation method, a shield method,
There are propulsion methods and pipe-in-pipe construction methods.Of these construction methods, the propulsion method is a method that pushes the pipe directly in places where the excavation method cannot be used, such as under railways, under elevated roads, under rivers, etc. The pipe-in-pipe method is also one of these, and is a method of inserting a new pipe into an existing pipe.

Conventionally, in these propulsion methods, a vertical shaft having a width of 3 to 3.5 m, a length of 5 to 8 m, and a depth of 3 to 3.5 m is dug, and a pair of support frames horizontal to the bottom of the vertical shaft ( (Normally called erection gantry) is installed horizontally, and two hydraulic jacks having a one-stage ram with a stroke of about 1 m are installed in parallel at one end, and a pipe with a length of 3.5 to 6 m is installed inside the aged pipe with these hydraulic jacks. , The ram of the jack is contracted, the spacer S of 30 to 70 cm in length made of steel is interposed in the space formed between the ram and the rear end of the pipe, and the ram of the hydraulic jack is extended again. The tube is pushed in through the spacer S (see FIGS. 5 and 6), and thereafter, this operation is repeated a necessary number of times for construction.

As the structure of the spacer S, a square steel plate 2 is welded to both ends of the short steel pipe 1 in FIG. 5, and a handle 3 for suspending is provided in the steel pipe 1 portion of the column, or a flat plate in FIG. It is known that the hollow cube 4 is made of a simple steel plate and the reinforcing ribs 5 are integrated inside in a lattice shape.

However, one spacer S weighs about 30 kg to 40 kg, and it takes a lot of labor to install it in a narrow vertical shaft. Further, it is necessary to stack the spacers S in several stages in the process of progressing the work. However, if the spacers S are not correctly overlapped, the spacers S may be pushed out laterally when pushed by the hydraulic jack. In a narrow shaft, there is no place for workers to evacuate, and for safety, workers must drive the jack after evacuation from the shaft each time. Further, when the next pipe is fed into the shaft, all the heavy spacers S used before become obstructive. Therefore, all the heavy spacers S have to be lowered from above the support frame, and the hydraulic ram extends only 1 m. Since there is no ram extension and storage, and installing the spacer a required number of times, the work becomes extremely inefficient,
The number of tubes that can be inserted in one day was at most about 8 to 10. Further, a high degree of skill is required to advance the rams of the two hydraulic jacks in parallel by the same size.

[0006]

Therefore, the present invention is to stop the use of the aforementioned spacers, which is very laborious and dangerous. Thus, the purpose of the present invention is to provide a market for a pipe laying method using a pipe-in-pipe that saves wasteful time and labor for inserting and removing the spacer, reduces the number of workers, and significantly improves work efficiency. And Further, it is also an object of the present invention to provide a market with a pipe laying method for laying a new pipeline in soil in the same manner with high efficiency.

[0007]

To achieve the above object, the present invention digs a vertical shaft into which a single standard pipe forming at least a part of a pipeline to be laid can be horizontally inserted. A pair of support frames that support the pipe at a level to be laid inside are installed horizontally, and are ends of the pair of support frames farthest from the position to be laid, and a vertical shaft or this vertical shaft. Install a hydraulic jack in the vertical shaft on the opposite side of the continuous pipe laying direction, supply the standard pipe in the vertical shaft into the vertical shaft, and support it on the pair of support frames. In the underground pipe laying method, the ram of the hydraulic jack is extended, the standard pipe is inserted inside the aged pipe, and the standard pipe is sequentially connected and inserted repeatedly. It is a formula and its stroke Using a pipe longer than the standard pipe, a single standard pipe is pushed into the existing pipe by a series of pushing operations by the feeding type hydraulic jack, and then the ram of the feeding type hydraulic jack. , And supply the next standard pipe onto the pair of support frames between the standard pipe that has just been pushed in and the hydraulic jack, insert a sealing material at the joint between the front and rear pipes, and then, similarly to the previous time, Extend the ram of the hydraulic jack and push in the standard pipe. The above operation is sequentially repeated to push a new standard pipe into an existing pipe, which is a method of laying an underground pipe.

In order to achieve the above object, the other invention digs a vertical shaft into which a single standard pipe forming at least a part of a pipeline to be laid can be horizontally inserted, and the pipe is inserted therein. A pair of support frames supporting horizontally at the level to be laid is installed horizontally, and is an end of the pair of support frames farthest from the position to be laid, and a vertical shaft or a pipe laying direction connected to this vertical shaft. In the vertical shaft on the opposite side, install the hydraulic jack, supply the standard pipe in the horizontal shaft in the vertical shaft,
It is supported by the pair of support frames, one end of which is brought into contact with the hydraulic jack, the ram of the hydraulic jack is extended, the standard pipe is inserted into the soil, the soil in the pipe is excavated, and it is carried out from the vertical shaft to the outside. However, in the underground pipe laying method in which the standard pipes are sequentially connected and inserted repeatedly, the hydraulic jack has a short ram of several stages and its stroke is longer than the length of the standard pipe. , A single standard pipe by the feeding type hydraulic jack, by a series of pushing operation, the standard pipe is pushed horizontally into the soil, then all the rams of the feeding type hydraulic jack are contracted, and with these operations, The soil in the pipe is carried out from the shaft, and the next standard pipe is supplied onto the pair of support frames between the standard pipe that has just been pushed in and the hydraulic jack, and the sealing material is inserted at the joint between the front and rear pipes. Let's go Times Similarly, by extending the ram of the hydraulic jack and pushes the standard tube. Next, the most advanced pipes are sequentially inserted into the soil, and the soil in the soil is sequentially carried out from the shaft to the floor. Further, in order to solve the above-mentioned problems, it is preferable that the operation of the hydraulic jack of the underground laying method is performed by a hand-held remote controller made of one of wired and wireless. The underground pipe laying method is characterized by repeating the above operation in sequence.

[0009]

【Example】

Example 1 An example including the inventions of claim 1 and claim 3,
A description will be given based on FIGS. 1 and 2. First, a seal pile 15 is driven into a part of the ground of a line having an existing pipe so as to sandwich the pipeline, and the gap is excavated to form the vertical shaft 10 deeper than the pipeline. Next, a pair of support frames 11 is installed in the bottom of the shaft 10 in the axial direction of the aged pipe P0 to a level where the standard pipe (new pipe) P can be inserted into the aged pipe P0. Next, a hydraulic jack 12 provided with a feed-out type ram 13 is installed at one end of the support member 11 so that the ram faces the direction in which the standard pipe P is pushed in and is parallel to the support frame 11. Is fixed to the steel material 14 or the like forming the wall surface of the shaft 10.

The hydraulic jack 12 is installed not only in the vertical shaft 10 but also in an existing pipe (an old pipe P0 or a new pipe P which has been previously reinforced) against the pipe to be reinforced. In the case where it is opened in the pit 10, the method of installing it in this existing pipe and fixing it to the steel material 14 constituting the wall surface of the vertical pit 10 as the member for receiving the reaction force is also the same. It is included in the embodiments of the invention (see FIG. 3).
The maximum propulsive force of the hydraulic jack 12 is 1 in the embodiment.
The one of 50 tons was used.

The feeding ram 13 described above has three or four stages. The maximum stroke when all the rams 13 are extended is longer than the length of the standard pipe P used, and the length of the standard pipe P normally used is 5 to 7
Since it is m, one slightly longer (about 20 cm) than this is used. Further, a backing member 16 that hits the rear end of the standard pipe P in the chordal direction is attached to the front end of the ram 13 in advance so that it can slide on the support frame 11.

A hydraulic hoop 17 for feeding pressure oil to the hydraulic jack 12 is provided outside the shaft 10 and the hydraulic jack 1 is provided.
2 and the hydraulic pump 17 are connected by a hose 19, and the operation panel 18 allows remote control of the operation of the hydraulic jack 12 by wire or wireless. This operation panel 18 is of a hand-held type, and it is not only inside the shaft 10 but also outside the shaft 10,
It can be operated in a new standard pipe P laid as required. The normal hydraulic pump 17 and the motor 20 for driving the same are provided as a single hydraulic unit A.

In order to carry out this method using the apparatus shown above, all the rams 13 of the hydraulic jack 12 are contracted, a new pipe P to be inserted is hung by a crane, and it is lowered into the shaft 10. It is installed between the aged pipe P0 to be inserted and the hydraulic jack 12 in alignment with the pair of support frames 11 in the axial direction.

Then, the operator operates the operation panel 18 from a safe place to move the ram 13 of the hydraulic jack 12 slightly forward, and the contact member 1 at the tip of the ram 13 is operated.
It is confirmed that 6 is accurately in contact with the rear end of the standard pipe P in the chord direction, and then the ram 13 of the hydraulic jack 12 is moved forward again by the operation panel 18 to move the standard pipe P into the aged pipe P0. Push it in, and if you do in this way
Are sequentially fed out, and when the rear end of the standard pipe P substantially coincides with the wall surface of the vertical shaft 10, the standard pipe P is continuously pushed into the wall.

Next, the operation of the operation panel 18 stops the advance of the ram 13, and immediately all the rams 13 are completely contracted and returned to the initial state. In this way, the next standard pipe P is lowered between the preceding standard pipe P and the abutting member 16 at the tip of the ram 13 by a crane, and the ram 13 of the hydraulic jack 12 is slightly advanced like the previous time, and the abutting member at the tip of the ram 13 is moved. After confirming that 16 is accurately in contact with the rear end of the standard pipe P in the chord direction, the operator can see the joint between the preceding standard pipe P and the subsequent standard pipe P sufficiently. While observing, the ram 13 is advanced by the handheld operation panel 18 and the standard pipes P in front and rear are fitted, and then the operator operates the hydraulic jack 12 again by the operation panel 18 to Push in the second standard pipe P and the previous first pipe P.

Thereafter, the same operation is repeated to lay a new standard pipe P having a required length in the old pipe P0. Aged pipe P0
Cement milk is injected between the channel and the newly laid standard tube P channel to integrate the two.

Embodiment 2 An embodiment including the inventions of claims 2 and 3,
This is shown in FIG. First, a seal pile 15 is driven into a line of the ground to be piped so as to sandwich the pipe line, and the space between them is excavated to form the shaft 10 deeper than the target pipe line. Next, a pair of support frames 11 is installed in the bottom of the shaft 10 in the axial direction of the designed pipeline at a level where the standard pipe (new pipe) P can be inserted into the soil. Therefore, if the design pipeline has a downward slope, the support frame 11 is installed at a downward slope according to the slope. Align with the design gradient and direction of the place such as vice versa.

Next, a hydraulic jack 12 provided with a pay-out type ram 13 is installed at one end of the support frame 11 so that the ram 13 is directed in the direction of pushing the standard pipe P and is parallel to the support frame 11, and is operated. It is fixed to a steel material 14 or the like constituting the wall surface at one end of the shaft 10 so that the reaction force sometimes received is sufficiently received. The other devices are the same as those used in the first embodiment. An excavation device 21 for excavating a pipe that has been separately inserted into the ground is separately prepared.

In order to lay a pipe line in the ground by using the above device, the ram 13 of the hydraulic jack 12 is contracted in the same manner as in the first embodiment, and the excavating bit 2 is provided at the tip of the standard pipe P.
5 with or without attachment, it is lowered into the shaft 10 by a crane, laid parallel to it on the pair of support frames 11, the ram 13 is extended a little, and the contact member 16 at the tip of the ram 13 is standard. After confirming that the rear end of the pipe P is accurately hit, the standard pipe P is continuously operated in the same manner as in Example 1.
Is pushed into the soil in the direction of the pair of support frames 11. Standard tube P
If is pushed into the soil, the ram 13 of the hydraulic jack 12 is contracted, the earth and sand in the standard pipe P is excavated by the excavator 21 or the scoop, and this is discharged to the outside of the vertical shaft 10.

Next, the next standard pipe P is lowered between the preceding standard pipe P and the hydraulic jack with a crane, and again the hydraulic jack 12 is operated in the same manner as in the first embodiment to form two standard pipes P connected in the longitudinal direction. Push it together. Then, the ram 13 is contracted again, and the earth and sand in the first standard pipe P1 is excavated and discharged (see FIG. 4). The drilling device 21 is not particularly limited,
Disk 22 that is inscribed in the standard pipe P1 at the tip and fits in a watertight manner
A method for discharging the muddy soil to the outside of the vertical shaft 10 by using a jet fountain ejected from a nozzle 23 to muddy the soil at the tip of the standard pipe P to be pushed in, and to suck the muddy soil to the outside of the shaft 10 by a suction hose 24 attached to the lower part of the disk. Is preferred.
In some cases, the soil at the tip of the standard pipe P to be pushed in by the ram 13 is softened with water. After that, the required number of standard pipes P are sequentially pushed into the soil, the soil is discharged, and the desired pipeline is laid in the desired underground.

[0021]

According to the invention described in claim 1, since the hydraulic jack to be used is of the pay-out type and its stroke is longer than one standard pipe to be used, it is not necessary to insert the spacers one by one in the middle. Therefore, it takes at most 4 to 5 minutes to push in one standard pipe, and even if the time to shrink the ram is taken into consideration, one cycle of work is 8 to 10 minutes. With the conventional spacer method, It takes 30 to 40 minutes to lay the pipes, and 8 to 1 in one day's work
The limit was 0 laying, but with the present invention, the laying work can be performed more than twice as efficiently.

Since the work does not involve inserting and removing the spacer, the labor for inserting and removing the spacer is unnecessary, and unlike the conventional work, the required number of workers can be reduced. Further, since no spacer is used, there is no risk that it will be ejected to the side when the hydraulic jack is pushed out. Further, in the present invention, since the hydraulic jack is a pay-out type, the length when all the rams are contracted can be made shorter than the jack of a single ram, and the vertical shaft length may be short,
Vertical shaft excavation can be done in such a short time.

In the method described in claim 2, as in the invention described in claim 1, since the hydraulic jack to be used is of the pay-out type and its stroke is longer than one standard pipe to be used, halfway through Since it is not necessary to insert spacers one after another, it takes at most 4 to 5 minutes to push in one standard pipe, and considering the time to shrink the ram, the time to push in one standard pipe is 8 to 10 minutes. Work in minutes.

Also, when excavating the earth and sand in the pipe, simply retracting all the feeding type ram makes a sufficient work space for earth removal between the jack and the pushed standard pipe, and immediately Soil can be removed, work effort is reduced, and work efficiency is approximately double that of the conventional method using spacers. In addition, after pushing standard pipes one after another, it is sufficient to excavate the earth and sand of the most advanced standard pipes. At the time of excavation, there is no danger of falling because the surroundings are protected by the standard pipes.

Since there is no spacer in the shaft,
While pushing the standard pipe P, it becomes easy to set the soil at the tip of the most advanced pipe into muddy water and install a hose for sucking this into the shaft and the standard pipe to be pushed.

Further, the method invention of claim 3 is a method of operating the hydraulic jack by a handheld operation panel according to the method of the invention of claim 1 or claim 2, so that the operator can move the standard pipes forward and backward. The hydraulic jack can be operated in a place where the joint can be observed well, the fitting of these pipes is accurate and complete, and a loud voice can be heard as when the fitting confirmation operator and the hydraulic jack operator are different as in the past. There is no risk that the hydraulic jack operator will mistakenly operate the hydraulic jack while crossing over or correcting the fitted state manually.

Effects Unique to the Embodiment In the method of the first embodiment, in addition to the effects of the inventions of claims 1 and 3, the feeding type jack 1 is obtained.
Since the ram 13 of No. 2 has a total length of about 7 m20 cm and a four-stage feeding type, the length of the feeding type jack 12 when all the rams 13 are contracted is 2 m to 2 m20 cm. When the pit is 7m, the vertical shaft 10 has a length of 9
m50 cm is sufficient, and when it is loaded on a truck, etc., the feeding jack 12, hydraulic unit A, padding member 16, etc. are also small in size. It has a volume and weight that can be loaded all at once, and a pair of support frames 11 and a feed-out jack 1 can be used for on-site work with the crane of the small truck.
2. You can carry the padding member and new pipe into the shaft,
Very efficient. If the hydraulic jack 12 has a maximum propulsion force of 250 tons or more, it is difficult to load it on a small truck, and if the propulsion force is 100 tons or less, the capacity is insufficient.

When the existing pipeline is opened on the wall surface opposite to the direction in which the standard pipe P is inserted into the vertical shaft 10, the above-mentioned feed-out type jack 12 is installed therein, Since the method of the present invention can be carried out, the length of the shaft 10 is 7
Even in the case of the standard pipe P of m, 7.5 m is sufficient at most, and the vertical shaft excavation time and labor are reduced. When the maximum thrust of the hydraulic jack 12 is 150 tons, the length is 50 to 70 in the case of a series of pipe-in-pipe construction methods.
You can go up to m.

In the method invention of the second embodiment, in addition to the effects of the inventions of the second and third aspects,
The apparatus and tool for carrying out this method can be carried into the site by one small truck equipped with a crane as in the case of Example 1, and the operation of pushing the standard pipe P into the soil is described in claim 1. The same effect as the invention is achieved. Further, the feeding type jacks 13 can be continuously pushed in until all the rams 13 push the full length of the standard pipe P without stopping halfway.

Further, if the earth and sand in the state-of-the-art standard pipe P is sequentially discharged after being pushed in, the pipes are laid in a row along with the promotion of the pipes, which is particularly suitable for laying a pipeline on soft ground.
Drilling bit 25 attached to the most advanced standard pipe P1
Can be collected at the next shaft 10 and can be used a considerable number of times if it is sharpened again. In both the first and second embodiments, since the spacer S is unnecessary, it is not necessary to carry the spacer S to the site, and the spacer S is put into the vertical shaft 10 when being pushed in by the hydraulic jack 12 and before the next standard pipe P is fished. It is not necessary to remove these spacers S one by one, and the work is significantly simplified as compared with the conventional method, and the work efficiency is improved. Further, since it is not necessary to place a large number of spacers and the like in the vertical shaft 10, it is possible to sufficiently set the suction hose when mudizing the excavated soil for drainage. Further, in the above-mentioned two embodiments, since the operation panel 18 is a hand-held type, the vertical shaft 10
The hydraulic jack 12 can be remotely operated while observing the joining condition of the pipes to be pushed in, such as inside the standard pipe P, and the condition of the standard pipe P at the beginning, which is a safe and reliable operation and the work efficiency is remarkably high. improves.

[Brief description of drawings]

FIG. 1 is a plan view of a vertical shaft portion of a first embodiment of the present invention during pushing in a standard pipe.

FIG. 2 is a front view taken along the line 2-2 of FIG.

FIG. 3 is a side view of another embodiment of how to support the hydraulic jack.

FIG. 4 is a vertical sectional side view of the working example 2 during work.

FIG. 5 is a perspective view of a known spacer.

FIG. 6 is a partially cutaway perspective view of another known spacer.

[Explanation of symbols]

 10 vertical shaft 11 support frame 12 hydraulic jack 13 ram 14 steel material 16 contact member 18 handheld remote control operation type P0 old pipe P standard pipe

Claims (3)

[Claims] 1. A vertical shaft into which a single standard pipe forming at least a part of a pipeline to be laid can be horizontally inserted, and a pair of support frames for horizontally supporting the pipe at the level to be laid therein are laid horizontally. Installed in a vertical shaft on the side farthest from the position to be laid out of the pair of support frames and on the side opposite to the pipe laying direction connected to the vertical shaft or this vertical shaft, and install the hydraulic jack. , The standard pipe is fed into the shaft in a horizontal posture and supported by the pair of support frames, one end of which is brought into contact with the hydraulic jack, and the ram of the hydraulic jack is extended to make the standard pipe of the old pipe. In the underground pipe laying method that inserts inside, successively connects standard pipes, and repeats insertion, in the hydraulic jack, the short ram is of a multi-stage feeding type, and its stroke is longer than the length of the standard pipe. A standard tube By the push-out type hydraulic jack, the standard pipe is pushed into the aged pipe by a series of pushing operations, and then the ram of the push-out type hydraulic jack is fully contracted, so It is supplied onto a pair of supporting frames between the jacks, a sealing material is interposed at the joint between the front and rear pipes, and then, similarly to the previous time, the ram of the hydraulic jack is extended and the standard pipe is pushed. A method of laying an underground pipe, characterized in that a standard pipe is pushed into an aged pipe by repeating the above operation in sequence. 2. A vertical shaft into which a single standard pipe forming at least a part of a pipeline to be laid can be horizontally inserted, and a pair of supporting frames for horizontally supporting the pipe at the level to be laid therein are laid horizontally. Installed in a vertical shaft on the side farthest from the position to be laid out of the pair of support frames and on the side opposite to the pipe laying direction connected to the vertical shaft or this vertical shaft, and install the hydraulic jack. , The standard pipe is fed into the shaft in a horizontal posture and supported by the pair of support frames, one end of which is brought into contact with the hydraulic jack to extend the ram of the hydraulic jack to extend the standard pipe into the soil. Inserting, excavating the soil in the pipe, carrying out from the vertical shaft to the outside, connecting standard pipes in sequence and repeating insertion, in the underground pipe laying method, the hydraulic jack has a short ram of several stages. The stroke is the length of the standard pipe. Using a long one, a standard pipe is pushed horizontally into the soil by a series of pushing operations by the feeding hydraulic jack, and then all the rams of the feeding hydraulic jack are contracted. With these works, the soil in the pipe is carried out from the vertical shaft to the outside, and the next standard pipe is supplied onto the pair of support frames between the standard pipe and the hydraulic jack, and the joint of the pipes before and after is supplied. Is inserted with a sealing material, and then, similarly to the previous time, the ram of the hydraulic jack is extended and the standard pipe is pushed in. Next, insert the most advanced pipes into the soil,
The soil in it is carried out from the vertical shaft to the floor. A method of laying an underground pipe, characterized in that the above operation is repeated in sequence. 3. The underground pipe laying method according to claim 1 or 2, wherein the operation of the hydraulic jack is performed by a hand-held remote controller which is one of wired and wireless. .