Underground pipeline excavation-restoration construction method of stage temperature-control field pipe-making

Abstract

The invention relates to an underground pipeline excavation-restoration construction method of stage temperature-control field pipe-making, comprising the following steps: (1) an old sewage pipeline is plugged and cleaned, and closed-circuit television equipment is adopted to detect the inner part of the pipeline; (2) an impervious tubular auxiliary lining flexible pipe is arranged in the pipeline, and soaking hardened resin is filled to form a resin flexible pipe; (3) the resin flexible pipe and a hot water delivery pipe for heating are turned over and are inserted in the impervious tubular auxiliary lining flexible pipe; (4)the resin flexible pipe is expanded to be closely attached to the inner wall of the old pipeline by utilizing water and compression air, the hot water is heated in a circulating way, the resin flexible pipe is hardened, and a lining new pipeline is formed on the inner wall of the old pipeline; (5) the pipe orifices at two ends of the lining new pipeline are cut, so as to lead the pipeline to be smooth. The method is characterized in that: the heating circulation of hot water is divided into three steps: a first step is carried out for 40-45 minutes at the temperature of 73-75 DEG C; a second step is carried out for 55-60 minutes at the temperature of 82-84 DEG C, and a third step is carried out 30-35 minutes at the temperature of 25-30 DEG C. The method can prevent seepage, and can prevent the hardened resin which is soaked in the material and is solidified and not hard from cracking caused by sharp cooling.

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. Construction method for trenchless repair of underground pipelines. 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 technology uses non-ground excavation techn...

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Problems solved by technology

[0005] However, when the hardening resin undergoes the usual chemical reaction of heating and hardening, when the temperature rises too fast, it will harden and sharply boil the resin, which will affect the strength of the new lined pipe, or cracks will occur. When it is damaged or leaks, an underground water channel will be formed at the crack, and new problems will occur in the underground pipe

[0006] It has been found through research that if the underground pipeline is heated rapidly during construction, rapid hardening and boiling of the resin will occur, which will cause bubbles in the cured material, affect the strength of the new lined pipe, or cause cracks , which is related to improper management of heating temperature during construction on site

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