Bury pipeline construction method with self-adjusting function

Abstract

The invention discloses a bury pipeline construction method with the self-adjusting function. The method includes the steps that first, a pipeline trench is excavated, and expansion joint burying foundation pits are excavated in the pipeline trench at the interval of 30-50 meters; second, thick medium sand with the thickness of 300-500mm is laid at the bottom of the trench; third, pipes are welded and buried; fourth, elbow type expansion joints are installed in the expansion joint burying foundation pits, and the two ends of the elbow type expansion joints are connected with the pre-buried pipes respectively; fifth, the first step, the second step, the third step and the fourth step are repeated till mounting of a whole pipeline is completed; sixth, the pipeline trench is backfilled. Compared with the prior art, the elbow type expansion joints are additionally arranged between the pipes with the adjacent distance of 30-50 meters, when the pipes are influenced by differential settlement, expansion deformation can be transmitted to the elbow type expansion joints, stressed deformation of the pipelines is avoided, the pipelines are prevented from being damaged, and the service life of the pipelines is prolonged.

Description

technical field [0001] The invention relates to the technical field of pipeline construction methods, in particular to a buried pipeline construction method with a self-adjusting function. Background technique [0002] Buried pipelines are currently commonly used facilities in oil and gas transmission projects. Burying pipelines underground does not affect surface activities. However, due to climate change and uneven subsidence of the foundation, it is easy to cause pipeline expansion and deformation, which directly affects the service life of pipelines. For the problem of short life, the existing solution is to strengthen the foundation soil of the buried pipeline, and prevent the expansion and deformation of the pipeline by reducing the uneven settlement of the foundation. This solution requires foundation treatment, which increases the project cost and construction period, resulting in waste of resources. Contents of the invention [0003] In order to solve the problem ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of waste of resources caused by reinforcing the pipeline foundation in the existing pipeline construction, the present invention provides a buried pipeline construction method with self-adjusting function, which adjusts the expansion and contraction deformation of the pipeline by setting an elbow-type expansion joint, extending the its service life