JPH08199623A - Pipe line laying method and its device - Google Patents

Abstract

PURPOSE: To efficiently laying a pipe line in the ground by a simple work. CONSTITUTION: Trucks 18, 22 are connected to the rear end of a base machine 1 to compose a ditch excavating machine together with a bucket elevator 8, and belt conveyors 24, 26 are loaded on the trucks 18, 22. As following the base machine 1 excavating a ditch D, the trucks 18, 22 are run for properly carrying in and laying a pipe P inside the ditch D. On the other hand, sediment excavated by the bucket elevator 8 is supplied onto the rear laid pipe P by the belt conveyors 24, 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to gas, electric wires, communication wires,
The present invention relates to a method and a device for laying a pipeline for water supply or the like in the ground.

[0002]

2. Description of the Related Art Conventionally, the following methods have been known as means for laying the above pipeline in the ground.

First, as shown in FIG. 8 (a), a groove D is dug in the ground G with a groove excavator 90. At that time, it is preferable to strike the sheet piles on both sides of the excavation area of the groove D in advance.

As shown in FIG. 1B, when the groove D becomes longer than the entire length of the laying pipe P, the groove D becomes longer.
The pipe P is carried in and laid. In addition, this pipe P
In the case of the second pipe or more, the rear end of the pipe P is connected to the front end of the previously laid pipe by welding or the like.

Here, the earth and sand 91 excavated by the groove excavator 90 is conveyed rearward by a dump truck 92 or the like and supplied onto the pipe P already laid as shown in FIG. The pipe P is buried in the ground.

[0006]

In the above method, the work of loading the earth and sand 91 excavated by the trench excavator 90 on the dump truck 92 and the earth and sand 9 loaded on the dump truck 92 are carried out.
1 is required to be carried out onto the pipe P, and the dump truck 92 has to be reciprocated many times between the excavation position and the earth and sand supply position, resulting in low work efficiency.

In view of such circumstances, it is an object of the present invention to provide a method and apparatus capable of efficiently laying a pipeline with a simple work.

[0008]

As means for solving the above problems, the present invention is to dig a trench in the ground while laying pipes in the trench sequentially and supplying earth and sand to the pipe to feed the pipe. In the method of laying a pipeline in the ground, as the excavation of the groove progresses, a trolley with a conveyor is run along the excavation direction, and the excavated earth and sand is conveyed backward by the conveyor and already laid. It is to be carried out on top of the pipe (claim 1).

In this method, the truck is run so as to straddle the groove (Claim 2), or the truck is run while a pipe for installation is mounted on the truck (Claim 3). Is more preferable.

More preferably, the bogie is towed by a groove excavator (Claim 4).

The present invention also provides for excavating a trench in the ground,
In the pipeline laying device for sequentially laying pipes in this groove and supplying earth and sand to the pipes to bury the pipes underground, a trolley capable of traveling and a conveyor mounted on the trolley are provided. , The conveyor is a main transport section for transporting earth and sand along the longitudinal direction of the groove at a position laterally separated from the groove when the carriage travels along the groove,
It has a carrying-out section for carrying out earth and sand from the rear end of the main carrying section toward the groove (claim 5).

In this apparatus, it is more preferable to provide a pipe mounting portion for mounting a pipe for laying at a position laterally separated from the groove in the truck (claim 6).

Further, it is more effective if a crane for loading the pipe mounted on the pipe mounting portion into the groove is mounted on the trolley (claim 7).

More preferably, the bogie is connected to a groove excavator and towed by the groove excavator (claim 8).

In this case, the connecting position of the bogie to the groove excavator is set so that the bogie runs across the groove excavated by the groove excavator, and the groove is always opened upward. It is more preferable to construct a carriage (Claim 9).

Further, it is more preferable to provide a sheet pile driving device in front of the groove excavator (claim 10).

It is preferable that a pipe connector for connecting the ends of the pipes to be lifted up and down is attached to the lower part of the carriage at a position before the earth and sand carrying-out position by the conveyor (claim 11). In this case, it is more effective if the pipe connector is slidably attached to the carriage in the traveling direction (claim 12).

[0018]

According to the method of claim 1, as the ditch excavation work progresses, the bogie on which the conveyor is mounted is caused to travel along the excavation direction without excavating the dump truck back and forth. The thus-prepared earth and sand can be continuously supplied onto the existing pipe by the conveyor, and the trench excavation work and the pipe burying work can be simultaneously executed.

Specifically, in the apparatus according to the fifth aspect, when the carriage travels along the groove, the main carrier portion moves the earth and sand backward along the longitudinal direction of the groove at a position deviated from the groove. The soil is carried by the carrying-out section from the rear end of the main carrying section toward the groove. Therefore, in the area in front of the carry-out section, the main carrying section does not hinder the carry-in of the pipe into the groove.

Further, according to the third and sixth aspects of the invention, if the trolley is mounted on the trolley while the trolley is run, the work for transporting the pipe to the pipe laying position is unnecessary. The pipe can be laid by simply carrying the pipe on the dolly into the groove below.

Particularly, in the apparatus according to claim 7, since the crane for loading the pipe mounted on the pipe mounting portion into the groove is mounted on the truck, a traveling crane or the like is installed in parallel with the truck. It is not necessary to drive the pipe, and it is possible to carry in the pipes on the trolley at an appropriate timing at any time.

As the traveling means of the trolley, a drive source may be mounted on the trolley or it may be pulled by a dedicated leader. However, as described in claims 4 and 8, the trolley is excavated by a groove. If the excavator is connected to the machine and towed, the bogie can be run without adding a special drive source or the like. Further, the truck can be made to follow the groove excavator with certainty.

The trolley may travel beside the excavation groove, but if the trolley travels across the excavation groove as described in claims 2 and 9, the traveling of the trolley can be prevented. Therefore, it is possible to further reduce the space in the width direction.

Further, if a sheet pile driving device is provided in front of the groove excavator as claimed in claim 10, the sheet pile driving operation in advance in the groove excavation area and the sheet pile driving position can be performed. The work of excavating the trench can be reliably and simultaneously performed.

Further, in the apparatus according to the eleventh aspect of the present invention, since the pipe connecting machine for connecting the end portions of the pipes to each other is attached to the lower portion of the carriage so as to be able to move up and down, at a position before the earth and sand carrying-out position by the conveyor. It is not necessary to introduce a special means for loading the pipe connecting device into the groove, and the pipes can be connected at a proper timing below the carriage.

Particularly, in the apparatus according to the twelfth aspect, since the pipe connector is configured to be slidable in the traveling direction with respect to the truck, the pipe connector and the truck can be operated when the pipe connector is used. By sliding, the pipe connection work can be performed while the truck is running without stopping.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS.

1 to 4, reference numeral 1 denotes a base machine, which is provided with a lower traveling body 2 having a traveling device such as a crawler 4 and an upper revolving body 5 having a cab or the like. There is.

A boom 6 which is driven up and down is mounted on the front part of the upper swing body 5, and a sheet pile driving device 7 is connected to the rotating end of the boom 6. This sheet pile placing device 7
Is equivalent to an apparatus that has been generally used in the past, in which the left and right sheet piles 3 are sequentially driven into the ground G along the traveling direction of the base machine 1. A bucket elevator 8 is connected to the rear portion of the base machine 1, and the bucket elevator 8 and the base machine 1 constitute a groove excavator.

As shown in FIG. 7, the bucket elevator 8 is provided with a vertically long frame 11, sprocket wheels 12, 13 are rotatably attached to the upper and lower ends thereof, and a chain 14 is hung between the sprocket wheels 12, 13. I have been passed over. Conveying buckets 15 are attached to the chain 14 at equal intervals along the longitudinal direction thereof, while at the lower end of the frame 11, an excavating wheel 16 having a plurality of excavating buckets 16a arranged in the circumferential direction rotates. It is installed as possible. The excavating wheel 16 is driven to rotate clockwise in FIG. 7 and the chain 14 is driven in the direction of arrow A1 in FIG. 7, so that the earth and sand excavated by the excavating wheel 16 is excavated by the excavating wheel 16. It is passed from the bucket 16a to each of the transport buckets 15, is transported upward by the transport buckets 15, and is discharged downward from the discharge port 10 in the upper portion of the frame 11.

The bucket elevator 8 is disposed behind the center position of the base machine 1 in the width direction (vertical direction in FIGS. 2 and 4), and the left and right sheet piles 3 which the sheet pile placing device 7 has already placed. The bucket elevator 8 is configured to excavate the gap.

A front trolley 18 is connected to the rear portion of the base machine 1 via a telescopic cylinder 17, and a rear trolley 22 is connected to the front trolley 18 via a long connecting rod 20. Each trolley | bogie 18 and 22 is equipped with the wheel 21 which can roll on the ground G, the front trolley | bogie 18 is arrange | positioned just behind the said bucket elevator 8, and the back trolley | bogie 22 is further arrange | positioned behind it, respectively. Therefore, as the base machine 1 travels, the two carriages 18 and 22 follow the base machine 1 and the bucket elevator 8 as well.

Here, the excavation width of the groove D by the bucket elevator 8 is defined by the left and right wheels 21 of the carriages 18 and 22.
It is set smaller than the interval between them.

A first belt conveyor (main transport section) 24 is mounted on both carriages 18 and 22, and a second belt conveyor (main transport section) 24 is mounted on the rear carriage 22.
A belt conveyor 26 is mounted.

The first belt conveyor 24 includes two carriages 18,
It extends in the arrangement direction of 22 (that is, the excavation direction of the groove D) and has a transport distance longer than the entire length of the laying pipe P.
The front end of the first belt conveyor 24 is supported by the front carriage 18 and the rear end of the first belt conveyor 24 is supported by the rear carriage 22. The entire first belt conveyor 24 is located at a substantially central position in the width direction of the base machine 1 (ie, the groove D). The excavation position is located laterally (to the right in the traveling direction in the illustrated example). Further, on the front carriage 18, a hopper 28 is provided at a position directly below the bucket elevator discharge port 10, and a belt conveyor extends from a position below the hopper 28 to a position just above the front end of the first belt conveyor 24. 30 is provided, and the earth and sand discharged from the bucket elevator discharge port 10 are supplied to the front end of the first belt conveyor 24 via the hopper 28 and the belt conveyor 30.

As shown in FIGS. 2 and 5 and 6, the front end of the second belt conveyor 26 is the first belt conveyor 24.
It is arranged at a position just below the rear end of the second belt conveyor 26, and the rear end of the second belt conveyor 26 is arranged behind the substantially central position in the width direction of the base machine 1 (that is, above the excavation groove D). The second belt conveyor 26
The arrangement position and orientation of the second belt conveyor 26 are set so that the earth and sand conveyed rearward by the belt conveyor 24 are carried into the groove D.

On the front and rear carriages 18 and 22, a pair of left and right pipe support plates as shown in FIGS. 3 to 6 is provided at a position opposite to the support position of the first belt conveyor 24 (left side in the traveling direction in the illustrated example). 31 is erected. Both pipe support plates 3
The space between the pipes 1 is set to be slightly larger than the diameter of the pipe P, and a pipe mounting portion capable of stacking a plurality of pipes P is formed between the pipe support plates 31.

Further, a crane 32 for transporting the pipe P is mounted on both carriages 18 and 22. Specifically, a guide rail 33 is laid in a region from the center position in the width direction on each of the carriages 18 and 22 to the end portion on the pipe mounting portion side (the left side in the traveling direction). A base 34 is allowed to travel along the base 34, and a telescopic jack 36 is erected on the base 34. Telescopic rod 37 of this telescopic jack 36
At the end portion (that is, the upper end portion) of the other side of the vehicle (the rear side of the front carriage 18 and the rear side of the rear carriage 2).
In FIG. 2, the arm 38 extending forward is fixed, and the telescopic cylinder 40 is fixed downward at the end of the arm 38. Then, the telescopic rod 41 of the telescopic cylinder 40
At the end (that is, the lower end) of the pipe P, the pipe gripping portion 42 can be switched between a state of grasping the pipe P from above and a state of releasing it.
Is provided.

On the lower surface of the rear carriage 22, a guide rail 46 extending in the front-rear direction is fixed at a substantially central portion in the width direction, and a cylinder device 47 is attached slidably along the guide rail 46. The cylinder device 47 includes a pair of front and rear telescopic cylinders extending downward, and a welding / inspecting machine (pipe connecting machine) 44 is coupled to an end portion (that is, a lower end portion) of the telescopic rod 48 of each cylinder. This welding / inspection machine 44 is equipped with a telescopic cylinder 4 for gripping.
9, the expansion and contraction of the expansion and contraction cylinder 49 enables switching between a state in which the pipe P is gripped and a state in which the pipe P is released. As shown by the two-dot chain line in FIG. In the gripped state, both pipes P are connected by welding and the inspection is performed. As the welding / inspecting machine 44, the same one as conventionally used can be applied.

Next, a pipeline laying method using this apparatus will be described.

1) First, a hole having a depth substantially equal to the groove to be excavated is excavated in the ground, and the bucket elevator 8 is inserted into this hole.

2) The base machine 1 is run while operating the bucket elevator 8 and the sheet pile driving device 7. As a result, the sheet pile driving device 7 sequentially drives the pair of left and right sheet piles 3 into the ground G along the traveling direction, and immediately behind it, the bucket elevator 8 excavates between the already piled sheet piles 3 and travels as described above. A groove D is formed in the direction. At this time, the front and rear bogies 18 and 22 follow the base machine 1 and travel along the excavation direction of the groove D while straddling the groove D. Also,
The first belt conveyor 24 is located on the right side of the groove D, and the pipe mounting portion is located on the left side of the groove D, so that there is nothing above the groove D between the front and rear carriages 18, 22. It is in a state.

3) When the length of the groove D becomes longer than the entire length of one pipe P, the telescopic jacks 36 and telescopic cylinders 40 of the front and rear cranes 32 are appropriately extended and retracted so that the pipes are mounted on the pipe mounting portion. The uppermost pipe P among the piled pipes P is grasped by the pipe grip portion 42, and then the telescopic jack 36 is extended to lift the pipe P, and the base 34
To convey the pipe P from the position on the left side in the traveling direction to the central position (that is, the position above the groove D). Thereafter, the telescopic jack 36 is contracted and the telescopic cylinder 40 is extended to lower the pipe P and place it on the bottom surface of the groove D.

4) When this pipe P is the second pipe or more, the rear end of this pipe P and the front end of the pipe P laid previously are connected by welding. Specifically, the cylinder device 4
Extend the cylinder 7 and lower the welding / inspection machine 44,
By operating the welding / inspecting machine 44 while gripping the contact points of both pipes P, both pipes P are connected.

It should be noted that it is preferable to specially set the welding groove D1 by setting the excavation depth larger in the portion corresponding to the welding point in the groove D than in the other portions. This allows
The welding work by the welding / inspection machine 44 becomes smoother.

5) When excavation proceeds by the bucket elevator 8, the outlet 10 of the bucket elevator 8
Excavated earth and sand are discharged from. This earth and sand is hopper 28
And the first belt conveyor 24 via the belt conveyor 30.
Is conveyed to the front end of the first belt conveyor 24, is conveyed backward by the first belt conveyor 24, and is then conveyed by the second belt conveyor 26 onto the existing pipe P in the groove D. As a result, the pipe P is buried in the ground.

The top surface of the landfill portion G1 is smoothed by the earthmoving machine 50 or the vibration compactor 5
Try to compact with 2.

In the method and apparatus of this embodiment, as the excavation work of the groove D progresses, the carriages 18, 2 are moved along the excavation direction.
2, the belt conveyors 24 and 26 are moved, so that the excavated earth and sand are continuously installed on the belt conveyors 24 and 26 without the conventional reciprocating dump truck. The pipe can be supplied onto the pipe P, and the trench excavation work and the pipe burying work can be continuously performed simultaneously to lay the pipeline efficiently and smoothly.

Further, the first belt conveyor 24 is provided with a groove D.
The first belt conveyor 24 is arranged at a position laterally away from the forming position and is carried out to the inside of the groove D by the second belt conveyor 26, so that the first belt conveyor 24 moves the pipe P into the groove D. It is possible to prevent the smooth carrying-in work from being disturbed.

The present invention is not limited to such an embodiment, and the following modes can be adopted as an example.

(1) In the present invention, a pipe may be conveyed by a separate truck or the like in parallel with the traveling of the carriages 18 and 22, and the pipe may be conveyed into the groove D by a crawler crane or the like. However, as in the above embodiment,
If a pipe mounting part is provided on this and the pipe P is mounted on it,
Without using a pipe transportation means such as a trailer,
The pipe P can be laid by simply carrying the pipe P of the pipe mounting portion into the groove below. Further, if a crane is also mounted on the carriages 18 and 22 as in the above-described embodiment, the carriage can be carried in a small space at any time with appropriate timing without the need to run a traveling crane in parallel with the carriages 18 and 22. There is an advantage that the work of loading the pipe P can be performed and the work efficiency can be further enhanced.

(2) In the present invention, traveling means such as a prime mover may be mounted on a carriage equipped with a conveyor. However, as in the above-mentioned embodiment, if a groove excavator (base machine 1) is connected to the bogies 18 and 22 and towed by the base machine 1, the bogies 18 and 22 can be moved without adding a special drive source. It is possible to drive the carts 18 and 22 and to reliably follow the base machine 1. Further, if the sheet pile driving device 7 is provided in front of the base machine 1 as in the above-described embodiment, the work of driving the sheet pile 3 in advance in the groove excavation area and the groove corresponding to the sheet pile driving position. There is an advantage that the work of excavating the ground can be reliably and simultaneously performed.

(3) In the present invention, the means for connecting the pipes P is not particularly limited, and a flange joint or the like may be used. However, as in the above embodiment, the welding / inspection machine 44 that connects the ends of the pipes to the lower part of the rear carriage 22 can be moved up and down at a position before the earth and sand carrying-out position by the second belt conveyor 26. If attached, the welding / inspection machine 44 can be appropriately fed out from below the rear carriage 22 that travels as the groove advances, without using any means for bringing the welding / inspection machine 44 into the groove. Welding and inspection can be performed at appropriate timing. In particular, if the welding / inspecting machine 44 is configured to be slidable in the traveling direction with respect to the rear carriage 22 as in the above-described embodiment, the carriage 22 is made to travel while the carriage 22 is traveling.
There is an advantage that welding / inspection work can be performed by the welding / inspection machine 44 without stopping.

(4) In the above embodiment, the first belt conveyor 24 and the second belt conveyor 26, which are separate from each other, are used as the main carrying section and the carrying-out section in the present invention. A single belt conveyor having an integral shape may be used.

(5) In the above embodiment, the carts 18 and 22 travel across the groove D, but these carts 1
8 and 22 are connected to a position deviated laterally from the central position of the bucket elevator 8 and the side of the excavation groove D is trolleyed by the carriages 18 and 22.
May run. However, if the carriages 18 and 22 straddle the groove D as described above, the carriage 1
There is an advantage that the space in the width direction for running 8, 22 can be further reduced, and the influence on the traffic at the time of construction can be further reduced. In this case, for example, if the carriage is divided into the front carriage 18 and the rear carriage 22 and the groove D is opened upward between the carriages 18 and 22 as in the above-described embodiment, the inside of the groove D can be increased. The smooth pipe loading work can be secured.

[0056]

As described above, according to the present invention, the following effects can be obtained.

According to the method of claim 1, as the trench excavation work progresses, a carriage with a conveyor is run along the excavation direction, and the excavated earth and sand is conveyed by the conveyor onto an existing pipe. Therefore, without exchanging the dump truck back and forth, the excavated earth and sand is continuously supplied onto the existing pipe by the above conveyor, and the groove excavation work and the pipe burying work are continuously executed simultaneously. Thus, there is an effect that the pipeline laying work can be efficiently and smoothly performed.

Further, in the apparatus according to the fifth aspect, when the carriage travels along the groove, a main transport section is provided at a position deviated from the groove, and the main transport section is directed from the rear end to the groove. Since the earth and sand are carried out by the carry-out section,
It is possible to prevent the main carrier section from hindering the smooth pipe carry-in operation into the groove in front of the carry-out section.

Further, in the method and apparatus according to the third and sixth aspects, since the pipe for laying is mounted on the dolly while the dolly is run, the pipe is transported to the pipe laying position. No special means needed,
There is an effect that the pipe on the dolly can be laid with a simple structure in which the pipe is directly carried into the lower groove.

Particularly, in the apparatus according to the seventh aspect, since the crane for loading the pipe mounted on the pipe mounting portion into the groove is mounted on the truck, the crane is run in parallel with the truck. There is an effect that a pipe can be carried in on a trolley at an appropriate timing at any time with a simple structure that does not require use and requires a smaller space.

In the method and the apparatus according to claims 4 and 8, since the groove excavator is connected to the bogie and the bogie is towed by the excavator, it is possible to reliably perform the operation without adding a special drive source. In addition, there is an effect that the truck can be driven while following the groove excavator.

Further, in the method and apparatus according to the second and ninth aspects, since the carriage travels across the excavation groove, the space in the width direction for running the carriage can be further reduced, and the traffic can be reduced. This has the effect of further reducing the effect on the. Moreover, since the bogie is constructed so that the excavation groove is always opened upward, it is possible to ensure the smooth loading work of the pipe into the groove.

In the apparatus according to the tenth aspect of the present invention, since the sheet pile driving device is provided in front of the groove excavating machine, the sheet pile driving operation is carried out in advance in the groove excavating area and the sheet pile driving position is set. The work of excavating the groove can be reliably and simultaneously performed, and the work can be smoothed.

Further, in the apparatus according to the eleventh aspect of the present invention, since a pipe connector for connecting the end portions of the pipes to each other is attached to the lower part of the carriage so as to be able to move up and down, at a position prior to the position where the conveyor carries out the sediment. It is possible to connect the pipes at an appropriate timing with a simple structure in which the pipe connector is unwound from the lower side of the carriage, even if no means is specifically provided to carry the pipe connector into the groove.

Particularly, in the device according to the twelfth aspect, since the pipe connector is configured to be slidable with respect to the carriage in the traveling direction, the pipe connector and the carriage can be operated when the pipe connector is operated. By sliding, the pipe connection work can be performed while the carriage is traveling without stopping, and the work efficiency can be further enhanced.

[Brief description of drawings]

FIG. 1 is a cross-sectional side view showing a pipeline laying apparatus in an embodiment of the present invention.

FIG. 2 is a plan view showing the pipeline laying device.

FIG. 3 is a sectional side view showing a front half of the pipeline laying device.

FIG. 4 is a plan view showing a front half of the pipeline laying device.

FIG. 5 is a cross-sectional side view showing the latter half of the pipeline laying device.

FIG. 6 is a plan view showing the latter half of the pipeline laying device.

FIG. 7 is a side view showing an internal structure of a bucket elevator provided in the pipeline laying device.

FIG. 8 is a cross-sectional side view showing a situation of laying a pipeline by a conventional method.

[Explanation of symbols]

 1 Base Machine (Constructing a Groove Excavator) 3 Sheet Pile 7 Sheet Pile Driving Device 8 Bucket Elevator (Constructing Groove Excavator) 18 Front Bogie 22 Rear Bogie 24 First Belt Conveyor (Main Conveying Section) 26 Second Belt Conveyor ( Carrying out part 31 Pipe support plate (forming a pipe mounting part) 32 Crane 44 Welding / inspecting machine (pipe connecting machine) D groove G Ground P pipe

Claims (12)

[Claims] 1. A method of laying a pipeline in which a pipe is laid in the groove while digging a groove in the ground, and earth and sand are supplied on the groove to bury the pipe in the ground. With this, a trolley with a conveyor is run along the excavation direction, and the excavated earth and sand is conveyed backward by the conveyor and carried out onto the already laid pipe. Method. 2. The pipeline laying method according to claim 1, wherein the trolley is run while straddling the groove. 3. The pipeline laying method according to claim 1, wherein the trolley is run while the laying pipe is mounted on the trolley. 4. The pipeline laying method according to claim 1, wherein the bogie is towed by a groove excavator. 5. A pipeline laying device for laying a pipe in the trench while excavating the trench in the ground, and supplying earth and sand to the pipe to bury the pipe in the ground,
It comprises a trolley capable of traveling and a conveyor mounted on the trolley, and the conveyor is in a longitudinal direction of the groove at a position laterally offset from the groove when the trolley travels along the groove. An apparatus for laying a pipeline, comprising: a main carrying section for carrying earth and sand along with a carrying-out section for carrying earth and sand from the rear end of the main carrying section toward the groove. 6. The pipeline laying device according to claim 5, wherein a pipe mounting portion for mounting a pipe for laying is provided at a position laterally offset from the groove in the truck. Pipeline laying equipment. 7. The pipeline laying device according to claim 6, wherein the carriage is equipped with a crane for loading the pipe mounted on the pipe mounting portion into a groove. . 8. The pipeline laying device according to any one of claims 5 to 7, wherein the truck is connected to a groove excavator, and the truck is towed by the groove excavator. Pipeline laying equipment. 9. The pipeline laying device according to claim 8, wherein the connecting position of the bogie to the groove excavator is set so that the bogie runs across the groove excavated by the groove excavator, A pipeline laying device, characterized in that the carriage is configured so that the groove is always opened upward. 10. The pipeline laying device according to claim 8 or 9, wherein a sheet pile driving device is provided in front of the groove excavator. 11. The pipeline laying device according to any one of claims 5 to 10, wherein a pipe is provided at a lower portion of the trolley for connecting end portions of the pipe at a position prior to a position for carrying out earth and sand by the conveyor. A pipeline laying device in which a coupling machine is mounted so that it can be moved up and down. 12. The pipeline laying device according to claim 11, wherein the pipe connector is attached to the carriage slidably in the traveling direction.