JP3421235B2 - 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 and apparatus for laying a pipe, and more particularly, to laying a pipe such as a gas pipe or a water and sewer pipe underground in a groove of the pipe, a wide working band is used. The present invention relates to a pipe laying method and device which are not required and can be easily performed by a small number of people.

[0002]

2. Description of the Related Art There is an excavation method as a method of burying pipes such as gas pipes and water and sewer pipes underground. An example of this excavation method will be described using a gas pipe as an example.

First, a work zone is prepared locally. Then
A truck equipped with a boom-type crane will transport various construction materials and equipment to the site, and a boom-type crane will unload them in the work zone. Next, the ground is excavated by a backhoe or the like to dig a groove for burying the pipe. The excavated ditch will be earthed to prevent it from collapsing, and the gas pipe will be suspended in the ditch. Next, the gas pipe is transported to the site by a truck, and the gas pipe is suspended in the groove by using a heavy machine such as a large crane at the site. Then, the gas pipes thus laid in the groove are joined by welding in the groove. Then, after inspecting the welded portion, the earth and sand carried by the dump truck are put into the groove to backfill the groove. Then, after the earth and sand in the groove are leveled, the earth and sand are compacted by a compaction device. When burying gas pipes under the road, pave the surface of the compacted soil.

When a gas pipe is buried under an existing road by the above-mentioned construction method, the width of the working zone is one lane and the length of the working zone is at most 1 considering the influence on traffic.
It was around 00m.

On the other hand, when the gas pipe is buried under the new road by the excavation method, there is basically no need to consider the influence on the traffic, so that it is not necessary to limit the width and length of the working zone. Therefore, as shown in FIG. 8, the groove 3 is previously excavated by the excavator 2 over the entire length of the pipe 1, the pipes 1 are welded to each other at the side of the groove 3 and inspected. The pipe 1 was sequentially hung and laid in the groove 3 by the crane 4, and the groove 3 was backfilled after the installation was completed.

According to the latter method, the welding work of the pipes 1 can be performed on the ground, so that the pipe laying work can be performed safely and at high speed.

[0007]

However, the former construction method described above has the following problems. As described above, the width of the work zone is preferably one lane in consideration of the influence on traffic, but since the pipe is suspended in the groove by a large crane, it is necessary to provide a work zone across two lanes. there were. Therefore, it was an obstacle to traffic. Since the welding of the pipes is performed in the groove, there is a danger, and the welding work space is limited, so that the welding work efficiency is poor.

On the other hand, the latter construction method described above has the following problems. The welding work of the pipes 1 can be safely performed on the ground, but since the pipes 1 are hung from the side of the groove 3 by the plurality of large cranes 4 in the groove 3, a large number of people are required for the pipe laying work. Moreover, since it is necessary to horizontally and vertically move the pipe 1 by each crane 4, complicated crane operation is required. If a wide work belt that can accommodate heavy equipment cannot be taken, burial work cannot be performed.

Accordingly, an object of the present invention is to lay a pipe such as a gas pipe or a water and sewer pipe in a groove of the pipe without burying a wide work zone and easily by a small number of people. Another object of the present invention is to provide a pipe laying method and device that can be used for other purposes.

[0010]

The invention according to claim 1 is
A groove is excavated in the pipe embedding place, then a pipe stand is placed on the groove at a predetermined interval, then a pipe is placed on the pipe stand along the groove, and then the pipe is placed. Then, one end of the pipe is movably supported with respect to the pipe by a pipe laying device movable above the groove along the groove, and then the pipe laying device is attached to the pipe. The pipe laying device is moved from one end to the other end, and the pipe holder is sequentially removed from the one end of the pipe in accordance with the movement of the pipe laying device, and thus, in the moving direction downstream of the pipe laying device. It is characterized in that the side pipe is lowered to the bottom of the groove from the one end side to the other end side by its own weight.

The invention according to claim 2 is characterized in that the pipe in the unlanded portion on the downstream side in the moving direction of the pipe laying device is supported by another pipe laying device. The invention according to claim 3 is characterized in that excavation of the groove and joining of the pipe are performed in advance over their entire lengths, and the pipe is continuously lowered to the bottom of the groove by the pipe laying device. I have.

According to a fourth aspect of the present invention, excavation of the groove and joining of the pipes are performed for each predetermined length, and the pipes are intermittently lowered to the bottom of the groove by the pipe laying device. Is to have.

According to a fifth aspect of the present invention, there is provided a bogie capable of traveling along a groove on which a pipe is laid, a tube supporting means attached to the bogie, and a predetermined space provided on the groove.
The pipe supporting means is mounted, and the pipe supporting means includes an arm attached to the carriage, a pipe supporting member attached to a lower end of the arm, and the arm along the width direction of the groove. It consists of a transverse means for moving the front
The storage tube support member has a shape in which the pipes joined to each other are placed.
In this state, it is possible to move independently of the pipe as the carriage moves .

According to a sixth aspect of the invention, the pipe laying apparatus according to the fifth aspect is characterized in that it has an elevating means for elevating and lowering the arm. Claim 7
In the invention described above, the pipe supporting means is applied to the lower surface of the pipe attached to the pair of arms attached to the carriage and the lower ends of the pair of arms, and is rotatable according to the movement of the carriage. And a traverse means for moving each of the pair of arms toward or away from each other along the width direction of the groove.

The invention according to claim 8 is characterized in that, in the pipe laying device according to claim 7, it has an elevating means for elevating and lowering the pair of arms. In the invention according to claim 9, a plurality of the pipe supporting members are provided at a lower end of the arm at intervals in the axial direction of the pipe about the arm, and the plurality of pipe supporting members are provided. It is characterized in that it can move up and down according to the inclination of the pipe in a vertical plane including the axis of the pipe with the arm as the center.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Next, one embodiment of the pipe laying method of the present invention will be described with reference to the drawings. 1 is a schematic plan view showing an embodiment of the pipe laying method of the present invention, FIG. 2 is a schematic side view showing an embodiment of the pipe laying method of the present invention, and FIG. 3 is a pipe laying method of the present invention. FIG. 4 is a schematic front view showing an embodiment of FIG. 4, FIG.
FIG. 6 is a schematic front view showing another pipe laying device of the present invention.
FIG. 7 is a schematic plan view showing another embodiment of the pipe laying method of the present invention, and FIG. 7 is a schematic side view showing another embodiment of the pipe laying method of the present invention.

1 to 4, 5 is a pipe laying device. As shown in FIG. 3, the pipe laying device 5 includes a self-propelled or towed trolley 7 that can travel on the groove 3 in which the pipe 1 is embedded along the groove 3 by wheels 6, and a pipe attached to the trolley 7. It comprises a support means 8.

The pipe supporting means 8 is attached to the trolley 7 vertically, and to the lower end of the arm 9.
A rubber-tire type tube support member 10 on which the tube 1 is placed and rotatable with the movement of the carriage 7, a cylinder type elevating means 11 for elevating and lowering the arm 9, and an arm 9 is moved along the width direction of the groove 3. It comprises a traversing means 12 for causing it. The elevating means 11 does not necessarily have to be provided. Reference numeral 13 denotes a tube holder placed on the groove 3 so as to straddle the groove 3 and be placed at a predetermined interval in the longitudinal direction of the groove 3. And 1
Reference numeral 4 denotes a pipe laying table provided at the bottom of the groove 3 along the longitudinal direction of the groove 3 with a predetermined interval.

The wheels 6 of the carriage 7 may be configured to run on rails laid on both sides of the upper surface of the groove 3 or to be crawler-type in order to suppress swinging of the carriage 7 in the vertical and horizontal directions as much as possible. Is also good. A plurality of tube support members 10 (two in this example) are provided at the lower end of the arm 9 at intervals in the axial direction of the tube 1 about the arm 9, and each of the plurality of tube support members 10 is provided. In order to support the tube 1 in a stable manner, it is formed in an hourglass shape, and the axis 1 is aligned with the inclination of the tube 1 in a vertical plane including the axis of the tube 1 around the arm 9.
It is possible to move up and down around 5. Tube support member 10
May be a sliding type other than the tire type. Rope means 1
The reference numeral 2 includes a rail 16 fixed to the carriage 7 in the width direction of the groove 3 and a fixing member 17 of the arm 9 movable along the rail 16.

Next, a method of laying a pipe in the groove by using the two pipe laying devices described above will be described. First, the groove 3 is excavated over the entire length in the ground where the pipe is buried. Then
The tube holders 13 are placed on the groove 3 with a predetermined space. Next, the tubes 1 are placed in a line along the groove 3 on the tube holder 13. Next, all the pipes 1 are joined by welding on the groove 3 and inspected. When the joining of all the pipes 1 is completed in this way, the two pipe laying devices 5A and 5B are introduced onto the groove 3, and one end of the pipe 1 is placed on each pipe support member 10. In order to mount the pipe 1 on the pipe support member 10, the pipe support member 10 is lowered between the pipe holders 13 by the elevating means 11 to the upper surface level of the groove 3, and then the pipe support member 10 is placed directly below the pipe 1. It is moved up to the traversing means 12. Next, the pipe support member 10 of the preceding pipe laying device 5A is slightly lifted by the elevating means 11. As a result, the pipe 1 is placed on the pipe support member 10, and the pipe holder 13 can be removed.

Next, the pipe laying devices 5A and 5B are moved from one end of the pipe 1 to the other end. Pipe laying equipment 5A, 5B
Even if is moved, since the pipe 1 is mounted on the rotatable pipe support member 10, the pipe 1 is not subjected to excessive force. Then, the pipe holder 13 is sequentially removed from the one end side of the pipe 1 along with the movement of the preceding pipe laying device 5A. The height of the pipe support member 10 of the trailing pipe laying device 5B is equal to that of the leading pipe laying device 5
The height is set lower than the height of the tube support member 10 of A. Thus, when the pipe 1 is placed on the pipe laying table 14 by its own weight, the pipe 1 is not subjected to an excessive bending stress. Since the tube support member 10 moves up and down around the axis 15 of the arm 9 in accordance with the inclination of the tube 1, the bending stress is not applied to the tube 1 from this point as well.

With the movement of the pipe laying devices 5A and 5B, the pipe 1 on the downstream side in the moving direction of the following pipe laying device 5B is gradually lowered by its own weight and placed on the pipe laying base 14 of the groove 3. Placed. At this time, the lateral movement of the arm 9 is adjusted by the traverse means 12 in order to accurately mount the pipe 1 on the pipe laying table 14, that is, in order to adjust the laying position of the pipe 1. The arm 9 may be rotatable in the horizontal plane to adjust the laying position of the pipe 1.

In this way, the preceding pipe laying device 5A
When the pipe has moved to the other end of the pipe 1, the pipe supporting members 10 of the leading and trailing pipe laying devices 5A and 5B are lowered to the bottom of the groove 3, and the other end of the pipe 1 is placed on the pipe laying table 14. Place. Then, both pipe support members 10 are moved laterally and removed from the pipe 1, whereby the laying of the pipe 1 is completed.

When the elevating means 11 is not provided in the pipe supporting means 8, the pipe 1 is placed on the pipe supporting member 10 at the start of the pipe laying, and the pipes at the start and end of the pipe laying. When retracting the support member 10, it is necessary to lift the pipe 1 with a simple crane or the like. The simple crane may be mounted on the carriage 7.

If the tube supporting means 8 is not provided with the elevating means 11, when the tube 1 is placed on the tube supporting member 10, the tube supporting member 10 is slightly lifted from the tube holder 13. It is necessary to adjust the height of.

FIG. 5 shows another pipe laying device 18. This pipe laying device 18 (18A is the preceding pipe laying device
B is a trailing pipe laying device. 2) is composed of a self-propelled or towed trolley 20 which can run on the groove 3 in which the pipe 1 is buried along the groove 3 by wheels 19, and a pipe support means 21 attached to the trolley 20. Tube support means 21
Is a pair of arms 22 mounted vertically on the carriage 20.
And attached to the lower end of each of the pair of arms 22,
A rubber tire type tube support member 23 on which the pipe 1 is placed and rotatable with the movement of the carriage 20, a cylinder type lifting means 24 for raising and lowering each of the pair of arms 22, and a pair of each of the pair of arms 22. 3 and the traverse means 25 for moving along the width direction.

The wheels 19 of the carriage 20 may travel on rails laid on both sides of the upper surface of the groove 3 or may be of a crawler type in order to suppress swinging of the carriage 20 in the vertical and horizontal directions as much as possible. Is also good. A plurality of pipe support members 23 are provided at the lower end of the arm 22 at intervals in the axial direction of the pipe 1 about the arm 22, and each of the plurality of pipe support members 23 has the arm 22 as the center. In a vertical plane including the axis of the pipe 1, the shaft 26 can be raised and lowered according to the inclination of the pipe 1. Each of the plurality of tube support members 23 may be formed in a drum shape to stably support the tube 1. The tube support member 23 may be a sliding type other than the tire type. The traverse means 25 is composed of a rail 27 fixed to the carriage 20 in the width direction of the groove 3 and a fixing member 28 of the arm 22 movable along the rail 27.

The pipe laying method by the pipe laying device 18 described above is basically the same as that by the pipe laying device 5. The only difference is the method of supporting the tube 1 by the tube support member 23. That is, when the pipe 1 is supported, the respective pipe support members 23 are brought close to each other by the traverse means 25, and when detached from the pipe 1, the respective pipe support members 23 are traversed means 25.
To separate from each other.

Also in the pipe laying device 18, as in the case of the pipe laying device 5 described above, the elevating means 24 of the pipe supporting means 21 does not necessarily have to be provided. Even in this case, the simple crane may be mounted on the carriage 20.

The above-mentioned pipe laying method is a case where the groove 3 is excavated over the entire length in advance and then the pipe 1 is continuously laid, but as shown in FIGS. Excavation, joining of pipes 1 and inspection are performed for each predetermined length, and pipe 1 is lowered to the bottom of groove 3 by pipe laying device 5 or 18.
The pipe 1 may be laid intermittently.

[0031]

As described above, according to the present invention, the following useful effects are brought about. Since a pipe laying work for burying pipes such as gas pipes and water and sewer pipes underground can be performed from above the groove, a wide work zone is not required. Since a crane for hanging the pipe in the groove is not required, a wide work zone is not required from this point as well, and the pipe laying work can be performed by a small number of people. Since the pipe is vertically lowered in the groove, operations such as positioning of the pipe can be easily performed as compared with the case where the pipe is suspended from the side of the groove by a plurality of cranes.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an embodiment of a pipe laying method according to the present invention.

FIG. 2 is a schematic side view showing an embodiment of the pipe laying method of the present invention.

FIG. 3 is a schematic front view showing an embodiment of the pipe laying method of the present invention.

FIG. 4 is a view on arrow AA of FIG.

FIG. 5 is a schematic front view showing another pipe laying device of the present invention.

FIG. 6 is a schematic plan view showing another embodiment of the pipe laying method of the present invention.

FIG. 7 is a schematic side view showing another embodiment of the pipe laying method of the present invention.

FIG. 8 is a schematic plan view showing a conventional pipe laying method.

[Explanation of symbols]

1: tube 2: Excavator 3: Groove 4: Crane 5: Pipe laying device 6: Wheel 7: trolley 8: Pipe support means 9: Arm 10: Pipe support member 11: Lifting means 12: Traversing means 13: Tube stand 14: Pipe laying stand 15: Axis 16: Rail 17: fixing member 18: Pipe laying device 19: Wheel 20: trolley 21: Pipe support means 22: Arm 23: Pipe support member 24: Lifting means 25: Traversing means 26: axis 27: Rail 28: fixing member

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masami Ishikawa 88 Ono-cho, Tsurumi-ku, Yokohama-shi, Kanagawa Japan Steel Pipe Works Co., Ltd. (72) Masato Maeda 88 Ono-cho, Tsurumi-ku, Yokohama-shi, Kanagawa Inside the steel pipe work Co., Ltd. (72) Inventor Satoshi Hasegawa 88 Ono-cho, Tsurumi-ku, Yokohama City, Kanagawa Japan Inside the steel pipe work Co., Ltd. (56) Reference JP 10-147969 (JP, A) JP 8 -338567 (JP, A) JP-A-6-280295 (JP, A) JP-A-6-229484 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) F16L 1/024 E02B 9/06 E02F 5/10 F16L 1/038

Claims (9)

(57) [Claims] 1. A groove is excavated in a place where a pipe is buried, a pipe stand is placed on the groove at a predetermined interval, and then a pipe is placed on the pipe stand along the groove. Next, the pipes are joined to each other, and then one end of the pipe is movably supported with respect to the pipe by a pipe laying device that is movable on the groove along the groove, and then the pipe laying device. Is moved from the one end to the other end of the pipe, and the pipe holder is sequentially removed from the one end of the pipe in accordance with the movement of the pipe laying device, and thus the pipe laying is performed. A pipe laying method, wherein the pipe on the downstream side in the moving direction of the device is lowered by its own weight to the bottom of the groove from the one end side to the other end side. 2. The pipe laying method according to claim 1, wherein the pipe in the unlanded portion on the downstream side in the moving direction of the pipe laying device is supported by another pipe laying device. 3. The excavation of the groove and the joining of the pipe are performed in advance over their entire length, and the pipe is continuously lowered to the bottom of the groove by the pipe laying device. The pipe laying method according to Item 1 or 2. 4. The excavation of the groove and the joining of the pipes are performed for each predetermined length, and the pipe laying device intermittently lowers the pipe to the bottom of the groove. Or the pipe laying method described in 2. 5. A dolly capable of traveling along the groove along which the pipe is laid, a pipe supporting means attached to the dolly, and a pipe stand placed on the groove at a predetermined interval. The pipe supporting means comprises an arm attached to the carriage, a pipe supporting member attached to a lower end of the arm, and a traverse means for moving the arm along the width direction of the groove. And the tube support members are
With the movement of the carriage with the pipe joined to the
A pipe laying device, characterized in that both are movable independently of the pipe. 6. The pipe laying device according to claim 5, further comprising an elevating means for elevating and lowering the arm. 7. The pipe supporting means is a pair of arms attached to the carriage, and is attached to a lower surface of the pipe attached to the lower ends of the pair of arms, and is rotatable according to the movement of the carriage. And a traverse means for moving each of the pair of arms toward or away from each other along the width direction of the groove.
The pipe laying device according to claim 5. 8. The pipe laying device according to claim 7, further comprising an elevating means for elevating and lowering the pair of arms. 9. A plurality of the tube support members are provided at a lower end of the arm at intervals in the axial direction of the tube about the arm, and the plurality of tube support members are provided.
The tube according to any one of claims 5 to 8, wherein the tube can be raised and lowered according to the inclination of the tube within a vertical plane including the axis of the tube about the arm. Laying equipment.