Trenchless spigot and socket pipe dismantling method

Abstract

The invention relates to a trenchless spigot and socket pipe dismantling method. The method is based on an auxiliary device which is arranged in a working well and used for installing and dismantlinga pipe joint, and is realized in combination with a new dismantling process. The auxiliary device comprises a pipe supporting track arranged at the bottom of the working well, a hoisting assembly anda flexible sling. When the pipe joint is placed on the pipe supporting track, a gap capable of accommodating a jack is left between the bottommost part of the pipe joint and the bottom of the workingwell. The dismantling process comprises the following steps that firstly, the hoisting assembly is inserted into the right end of the pipe joint; then, under cooperation of the jack, the flexible sling and a crane, the right end of the pipe joint moves up and down slowly and rhythmically with small amplitude, so that the spigot-and-socket relationship between the left side of the pipe joint and the right side of an adjacent upstream pipe joint is loosened and separated, and the separated pipe joint falls off on the pipe supporting track; and finally, the pipe joint is hoisted out of the working well through a hoisting hole of the hoisting assembly or in a strapping lifting manner to complete dismantling of the pipe joint.

Description

technical field [0001] The invention belongs to the field of pipeline engineering construction, and relates to a method for dismantling a pipeline, in particular to a method for dismantling a trenchless socket pipeline. Background technique [0002] Pipeline engineering technology is widely used today and plays a pivotal role in municipal construction and water conservancy construction. The quality control of the pipeline jacking installation process is particularly important. When there are problems such as axis deviation, elevation error, or pressure leakage at the pipeline interface during the pipeline installation process, it must be dismantled and re-constructed. The commonly used pipe removal method is to directly use a crane to lift the pipe with quality problems from rigid materials, so that the socket or socket of the pipe joint after dismantling will be damaged, and sometimes the main body of the pipe joint will be damaged. The section cannot be recycled again, wh...

AI Technical Summary

Problems solved by technology

The commonly used pipe removal method is to directly use a crane to lift the pipe with quality problems from rigid materials, so that the socket or socket of the pipe joint after dismantling will be damaged, and sometimes the main body of the pipe joint will be damaged. The section cannot be recycled again, which wastes the pipe material and increases the construction cost

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