Method for repairing drainage pipeline without water supply suspended

Abstract

The invention provides a method for repairing drainage pipeline without water supply suspended, which comprises the following steps of: site survey; pipeline cleaning; endoscope check for pipeline; local processing for ends of the drainage pipeline; manufacturing of a complex fiber hose and waterproof films; preparation of resin; impregnation of the complex fiber hose with resin mixture; positioning and installation of the resin liner hose; pressure maintaining curing by water filling; processing of liner end tip; and acceptance and operation of the pipeline with water supply. The method has the advantage that: on the basis of the sufficient utilization of upstream and downstream inspection shafts, repair for the drainage pipeline is performed with no excavation completely. With the help of the characteristics of the liner hose, irregular pipelines, such as round, arc, square and the like, can be repaired. Sewage discharge and repair are completed inside the pipeline while no influence is applied to traffic and environment. Natural curing of the resin liner can save not only energy, but also fund, and owing to smooth surface of the liner, flow quantity is not impacted. Tough crosslinker is formed as organic compound of crosslinker after curing and includes quite stable chemical bonds in case of no ultraviolet, so the service life can reach over 50 years.

Description

technical field [0001] The invention relates to a method for repairing a drainage pipeline, in particular to a method for repairing a drainage pipeline without stopping water. Background technique [0002] Due to the corrosiveness of sewage, drainage pipes are prone to decrease in pipe strength, fragmentation and sewage leakage. The traditional method of pipeline repair is to reinforce the pipeline with resin lining. There are two methods: flipping method and resin hose dragging method: these technologies are collectively referred to as resin pipe curing in place (CIPP) technology. When repairing with this technology, the sewage in the old pipeline must be diverted, also known as pouring water, that is, the sewage is pumped out from the upstream inspection well with a water pump, and then discharged into a downstream inspection well through a temporary pipeline on the ground or underground. The liner is then installed into the old pipe and heat is applied to cure the liner ...

AI Technical Summary

Problems solved by technology

[0003] Water pouring is a very difficult job for the municipal government. First, the sewage flow rate is relatively large and unstable; second, many pump sets are required to work together, which is noisy and consumes a lot of power; third, the minimum distance for pouring water is generally one The distance between the wells is about 30-70 meters, and it is difficult to ar

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