Method for constructing natural gas pipelines in mountain environment

Abstract

The invention discloses a method for constructing natural gas pipelines in a mountain environment. The method at least includes the following steps that firstly, setting-out of a construction operation zone is conducted, the positions of positioning piles marked in a design drawing are determined by the aid of position finders at first and marked by striking signs so as to designate the construction operation zone, then the positions of the positioning piles are rechecked through the position finders after excavators arrive in place, and the operation zone is marked through ropes; secondly, a trench is dug; thirdly, construction platforms are built; fourthly, the pipelines are arranged, assembled and welded; and fifthly, backfilling and regreening are conducted, pipeline laying is completed, surplus soil is put back and punned, then regreening is conducted, and hydraulic protection measures are built. Due to the structural design, the method has the beneficial effects that construction is convenient, the construction effect is good, and water and soil preservation effects after construction and later-period regreening effects are good.

Description

technical field [0001] The invention relates to the technical field of natural gas pipeline construction, in particular to a construction method for a natural gas pipeline in a mountainous environment. Background technique [0002] At present, the technology of laying natural gas pipelines in areas with good natural conditions is quite mature. However, how to lay natural gas pipelines in rugged and steep mountains under the premise of ensuring the laying quality and protecting the environment and safety of the natural gas pipelines along the route is a major problem that needs to be solved urgently. [0003] Most of the rugged and steep mountains are in the barren and inhabited mountainous areas. The slope of the mountain in the area to be constructed is relatively large, and the terrain is relatively complex, with continuous peaks and gullies and dense woodlands. It is difficult to locate the pipe position. The error of the pipe position positioning is due to the later alig...

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Problems solved by technology

[0004] In addition, the soil layer of some mountainous areas may contain slightly weathered hard granite, etc. The existence of granite has great impact on pipe laying, material transportation, excavation, pipe assembly, water and soil protection during construction, and later greening work. many new puzzles

[0005] During construction in mountainous areas, the construction work belt in mountainous areas should generally not be expanded too large. When the slope is relatively large, there are certain difficulties in pipe layout, assembly and welding on the hillside.

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