Deeply buried high pressure gas pipeline detection method

Abstract

The invention discloses a deeply buried high pressure gas pipeline detection method. The method comprises the following steps: according to an on-site gas pipeline investigation result in an earlier stage, firstly constructing two vertical shafts right above a rough route of a pipeline, wherein each vertical shaft is constructed by adopting a shaft wall inversion method, and exavation depth is 13.2m; after each vertical shaft is completely constructed, firstly detecting a position of the pipeline by using a radar, and then proving a specific route and elevation of the pipeline in a sounding way. The method disclosed by the invention solves the problems that the traditional pipeline detection method is big in error during detection on a deeply buried metal pipeline and a non-metal pipelinecan not be located, has the characteristics of high precision, easy operation and quick effect, has strong practical value in accurate detection on a deeply buried pipeline and is broad in applicationprospect and worth being learned and popularized.

Description

technical field [0001] The invention relates to the technical field of pipeline detection, in particular to a method for detecting deep-buried high-pressure gas pipelines. Background technique [0002] In recent years, trenchless technology has developed rapidly, and trenchless techniques such as horizontal directional drilling or pipe jacking are increasingly used during pipeline crossing construction, such as crossing roads, canals, and crossing pipelines. The buried depth of the pipeline laid by this kind of technology is usually deep, generally 3~20m, and the buried depth of the pipeline crossing the river can reach 30m. Conventional underground pipeline detection instruments use the electromagnetic induction method to detect shallow buried metal pipelines more accurately, but for ultra-deep metal pipelines, the detection error is very large. Generally, the plane detection error reaches 20%-30% of the buried depth, and the depth detection error is higher than the plane p...

AI Technical Summary

Problems solved by technology

Conventional underground pipeline detection instruments use the electromagnetic induction method to detect shallow buried metal pipelines more accurately, but for ultra-deep metal pipelines, the detection error is very large. Generally, the plane detection error reaches 20%-30% of the buried depth, and the depth detection error is higher than the plane position detection. The error is larger, and the pipeline instrument cannot locate the non-metallic pipeline

In recent years, due to inaccurate detection results of deep-buried pipelines and other reasons, accidents of damage to underground pipelines have occurred frequently, resulting in huge economic losses and adverse social impacts

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