Pipeline replacement method

Abstract

The invention relates to the technical field of replacement of large-diameter concrete water delivery pipelines, in particular to a pipeline replacement method. The pipeline comprises a defective pipe joint (1) and pipe joints (3) connected to the two opposite ends of the defective pipe joint (1) in the axial direction, and the replacement method comprises the step of removing the defective pipe joint (1) and specifically comprises the steps that S1, the defective pipe joint (1) is divided into a middle section and connecting sections (2) located on the two sides of the middle section in the axial direction, and the middle section is removed; and S2, the connecting sections (2) are moved in the direction away from the corresponding pipe joints (3) so as to be separated from the corresponding pipe joints (3), and therefore the connecting sections (2) are removed. According to the replacement method of the pipeline, the defective pipe joint is removed in a segmented mode, so that other pipe joints matched with the defective pipe joint are prevented from being damaged when an operator removes the defective pipe joint, the other pipe joints are protected to be intact, and the overall stability and safety of the pipeline after the defective pipe joint is replaced are facilitated.

Description

technical field [0001] The invention relates to the technical field of replacement of large-diameter concrete water pipelines, in particular to a replacement method for pipelines. Background technique [0002] At present, there are more and more projects using water pipelines in large-scale water diversion projects in my country, such as PCCP pipes (prestressed steel cylinder concrete pipes), PCP pipes (prestressed reinforced concrete pipes), glass sand pipes, reinforced concrete pipes, etc. Circular pipes such as pipes and steel pipes are water pipelines commonly used in the prior art. However, due to design and construction quality defects, improper operation management and other reasons, pipe bursts have occurred in many water diversion projects, seriously threatening the safe operation of water pipelines. [0003] Most of the PCCP pipe bursts are caused by defects such as broken wires of the hoop prestressed steel wires wrapped around the high-strength concrete pipe core...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a replacement method for pipelines in order to overcome the problems of high difficulty in replacement and poor safety of new pipelines caused by directly cutting off the defective pipe joints in the prior art and then replacing them with new pipe joints. The replacement method of the pipeline removes the defective pipe joint in sections, avoiding the operator from damaging other pipe joints that are compatible with the defective pipe joint when removing the defective pipe joint, which is convenient to protect other pipe joints intact, and is conducive to the replacement of the pipe. The overall stability and safety after removing the defective pipe joint

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