Method for repairing underground pipeline without digging

Abstract

The invention relates to a method for repairing an underground pipeline without digging, which comprises the following steps: (1) blocking and cleaning an old sewage pipeline needing repair and usingclosed circuit TV system (CCTV) equipment to detect the inner part of the pipeline; (2) delivering a waterproof barrel-shaped auxiliary lining hose pipe into the pipeline and injecting thermosetting resin to form a resin hose pipe; (3) turning over and inserting the resin hose pipe and a warm water delivery pipe for heating into the waterproof barrel-shaped auxiliary lining hose pipe; (4) expanding the resin hose pipe with water and compressed air so that the resin hose pipe is tightly attached to the inner wall of an old pipe, circularly heating by warm water and hardening and molding the thermosetting resin hose pipe so that the inner wall of the old pipe forms a new lining pipe with high strength; (5) opening pipe openings at both ends of the new lining pipe by cutting to smooth the pipeline; and (6) cutting at the extending positions of the pipe openings of the new lining pipe, which are positioned in the well wall of a check well. The method can prevent leakage, protect the pipe openings, prevent the thermosetting resin injected into the lining hose pipe from being mixed with underground water and prevent a poor phenomenon of lining material part hardening.

Description

technical field [0001] The present invention relates to the improved invention of the overall repair technology of municipal drainage underground pipes, agricultural water underground pipes, industrial water underground pipes, tap water underground pipes, gas underground pipes and other underground pipes. Specifically, the present invention relates to a trenchless repair of underground pipes Construction method. Background technique [0002] In the past, in order to repair the damage of municipal drainage underground pipes, agricultural water underground pipes, industrial water underground pipes, tap water underground pipes, gas underground pipes and other underground pipes, large-scale excavation on the ground will cause serious impact on traffic, and The construction period is long, the construction noise is loud, and there is a lot of engineering waste, which also has a great impact on the surrounding environment. [0003] For this, as figure 1 As shown, the emerging te...

AI Technical Summary

Problems solved by technology

In the past, when the repairing pipe lining material was used to form a lining pipe inside the old pipeline, the pipe mouth was not treated, and the pipe mouth could not be integrated with the well wall of the inspection well to prevent leakage.

Also, if groundwater leaks from the damaged part of the underground pipeline during construction, the thermosetting resin impregnated in the material will mix with groundwater, which will increase the occurrence of poor hardening of a part of the lining material.

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