Non-excavation internal PE pipeline penetration restoration method

Abstract

The invention discloses a non-excavation internal PE pipeline penetration restoration method. The method comprises the following specific steps that early-stage exploration is performed; a working pitis excavated, and a to-be-restored pipeline is cleaned; an experiment PE pipeline is pulled to penetrate through the to-be-restored pipeline, and whether the damage degree of the experiment PE pipeline meets a standard or not is observed; the PE pipeline is pulled to enter the to-be-restored pipeline, wherein the PE pipeline is composed of a plurality of PE pipeline segments, the tail end of eachfront PE pipeline segment is welded to the front end of a corresponding rear PE pipeline segment, and pulling is performed again after cooling and pipeline pressure testing are completed; pressure testing is performed on the pipeline segments one by one, every two pipeline segments are connected, and a pipeline penetrates through the pipeline segments for pressure testing; and after reinforcing treatment is completed, working pit backfilling is performed. According to the non-excavation internal PE pipeline penetration restoration method adopting the above structure, the to-be-restored pipe does not need to bear pressure, no potential safety hazard exists, the single-time pipeline penetration length is increased and can reach 1500 meters, the excavation area is greatly decreased, and influences on transportation and production are less.

Description

technical field [0001] The invention relates to a pipeline repair technology, in particular to a method for repairing a non-excavation inner penetration PE pipeline. Background technique [0002] With the development of my country's economy, the construction of cities and enterprises is becoming more and more standardized. The transformation and renewal of underground pipe networks is the focus and difficulty of urban and enterprise construction. In the existing technology, it is necessary to excavate the entire ground to replace pipes, and some of them use interspersed hoses. , but the hose cannot bear the pressure independently, and the original pipeline still needs to bear the design pressure, which cannot fundamentally solve the safety hazards of water leakage or even bursting of the overdue service pipeline. At the same time, the larger the caliber and the longer the length, the more difficult it is to intersperse, so that only short-distance pipes are interspersed in th...

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Problems solved by technology

[0002] With the development of my country's economy, the construction of cities and enterprises is becoming more and more standardized. The transformation and renewal of underground pipe networks is the focus and difficulty of urban and enterprise construction. In the existing technology, it is necessary to excavate the entire ground to replace pipes, and some of them use interspersed hoses. , but the hose cannot bear the pressure independently, and the original pipeline still needs to bear the design pressure, which cannot fundamentally solve the safety hazards of leaking or bursting of the overdue service pipeline

At the same time, the larger the caliber and the longer the length, the more difficult it is to intersperse, so that only short-distance pipes are interspersed in the prior art, which makes a large number of work pits excavated, affecting urban traffic and enterprise production, and frequent excavation may also cause potential safety hazards.

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