JP5115456B2 - Laying and burying pipelines on steep slopes - Google Patents

Description

  The present invention is a pipeline laying and burying method for laying and burying pipelines on steep slopes, and is applied to laying and burying transportation pipelines for gas, water and sewage, oil, etc. on sloping ground. In particular, this pipeline laying and burying method can be applied even when the slope section is long, and is therefore suitable for pipeline laying and burying work in mountainous areas.

Conventionally, with respect to construction techniques for laying and burying pipelines on steep slopes, for example, as described in Patent Literature 1 and Patent Literature 2, operations such as slope shaping and excavation using a hydraulic excavator (backhoe) are performed. A construction method and a construction apparatus are disclosed.
JP 05-105122 A JP 2002-167762 A

  However, as shown in FIG. 2, in order to excavate a buried groove on a slope using a hydraulic excavator (backhoe) 51, a flat heavy machinery scaffolding, a carrier dump 52 for carrying out excavated soil and transporting materials and equipment. Had to be built in a zigzag shape on the slope.

  For this reason, a large area is required as a work site, and large-scale tree cutting, restoration of the filling section after construction, and restoration of greening have been performed to secure the site.

  In addition, because the ground conditions are not always uniform, such as the presence of a part that tends to collapse partially on the slope, it is difficult to select the passage construction position, and there are problems such as passage repair due to the influence of rainwater precipitation, etc. .

  The present invention has been made in view of the circumstances as described above, and when laying and burying a pipeline on a steep slope, a small area along the burial position of the pipeline is not required without requiring a large-scale site. It aims at providing the pipeline laying and embedding method which enables construction limited to.

  In order to solve the above problems, the present invention has the following features.

[1] A method of laying and burying a pipeline on a steep slope,
An excavation process for excavating the place where the pipeline is laid and buried with a hydraulic excavator for steep slopes;
A pipe transportation / installation process in which a pipe to be laid / buried is transported by a cableway, and the transported pipe is installed at a laying / burial site excavated in the excavation process;
A pipe welding process of welding the pipe and the pipe installed in the pipe transportation / installation process;
A steep slope characterized by having a backfilling process for transporting backfilling material by cableway, and using the transported backfilling material to backfill excavated laying and burying sites with a cableway and a hydraulic excavator for steep slopes Pipeline laying and burying method.

  In the present invention, when laying and burying a pipeline on a steep slope, it is possible to perform construction limited to a small area along the pipeline burying position without requiring a large-scale site.

  One embodiment of the present invention will be described.

  In one embodiment of the present invention, when laying and burying a pipeline on a steep slope, as shown in FIG. 1, the excavator 21 for a sloping land and a cableway (cable crane) 22 are appropriately combined, and (a) an excavation step, The construction procedure of (b) pipe transportation / installation process, (c) pipe welding process, and (d) backfilling process is taken.

  First, in (a) the excavation process, as shown in FIG. 1 (a), excavation in a minimum range 20 necessary for pipeline laying and burying work is performed using an existing excavator 21 for inclined land.

  As for the excavated soil, when excavated soil is transported by the inclined excavator 21, the excavated soil 22 is not efficient because the excavated soil is pushed out to the lower part of the slope or is transported by the bucket of the inclined excavator 21. Can be transported safely and efficiently.

  In addition, in the case of a small-scale pipeline laying / buried construction, the excavated soil may be transported using a monorail instead of the cableway 22.

  Next, in the (b) pipe transport / installation process, as shown in FIG. 1 (b), the pipe 11 is transported by the cableway 22 from the material yard constructed at the lower part of the slope or the upper part of the slope, and laid by excavation in the excavation process.・ Install the pipe 11 in the buried part. Thus, by carrying and installing the pipe 11 through the cableway 22, the pipe 11 can be carried and installed safely and quickly.

  Next, in the (c) pipe welding process, as shown in FIG. 1 (c), the pipe (laying pipe) 10 already laid and the newly installed pipe 11 are welded.

  At that time, in order for the welder 31 to perform the welding work, it is necessary to excavate a flat welding work floor. By using the excavator 21 for the sloping ground, the necessary and sufficient size of the welding work floor can be efficiently used. Can be excavated.

  In addition, welding equipment, inspection equipment, and the like can be quickly transported from the material yard set up at the upper or lower slope.

  Finally, (d) in the backfilling process, as shown in FIG. 1 (d), the backfilling material (good quality soil) is transported by the earth and sand bucket (or large open sandbag etc.) 33 using the cableway 22. Then, the backfill material is put into the excavation groove 30 from the earth and sand bucket (or a large sandbag or the like having a bottom opening) 33. Then, rolling and compacting work is performed.

  At that time, since rolling and compacting by manpower is inefficient in steep slopes, the circumference of the tube 11 is compacted and compacted by manpower to protect the tube 11, and the others are mechanically compacted by the excavator 21 for sloping land.・ Consolidate. Thereby, sufficient compaction is performed and the stability of an inclined surface can be ensured.

  Thus, in this embodiment, when laying and burying a pipeline on a steep slope, the excavator 21 for sloping land and the cableway (cable crane) 22 are appropriately combined, so that Since construction work such as large-scale temporary roads is not required and construction can be performed at a limited location, it is possible to select and construct more stable geological conditions on the slope by conducting a geological survey in advance. As a result, the certainty of construction is improved, and the slope stability during construction and after construction restoration is excellent. In addition, logging for construction and development activities can be minimized.

It is a figure which shows the construction procedure in one Embodiment of this invention. It is a figure which shows a prior art.

Explanation of symbols

10 Laying pipe 11 Pipe 21 Excavator for sloping land 22 Cableway (cable crane)
30 Excavation range (excavation groove)
31 Welders 32 Welding work floor 33 Sediment bucket or large open sandbag 51 Hydraulic excavator (backhoe)
52 Carrier dump

Claims (1)

A method of laying and burying pipelines on steep slopes,
An excavation process for excavating the place where the pipeline is laid and buried with a hydraulic excavator for steep slopes;
A pipe transportation / installation process in which a pipe to be laid / buried is transported by a cableway, and the transported pipe is installed at a laying / burial site excavated in the excavation process;
A pipe welding process of welding the pipe and the pipe installed in the pipe transportation / installation process;
A steep slope characterized by having a backfilling process for transporting backfilling material by cableway, and using the transported backfilling material to backfill excavated laying and burying sites with a cableway and a hydraulic excavator for steep slopes Pipeline laying and burying method.

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