Trenchless repair method for underground pipeline by turning and attaching lining pipe

Abstract

The invention relates to a trenchless repair method for an underground pipeline by turning and attaching a lining pipe. The method comprises the following steps of: (1) blocking and cleaning an old sewage pipeline which is needed to be repaired, and detecting the inside of the pipeline by using closed circuit television (CCTV) system equipment; (2) feeding a watertight barrel-shaped auxiliary lining hose into the pipeline, and impregnating heat-curing resin to form a resin hose; (3) turning the resin hose and a warm water conveying pipe for heating and inserting into the watertight barrel-shaped auxiliary lining hose; (4) making the resin hose expanded and tightly attached to the inner wall of the old pipe by using water and compressed air, circularly heating by using warm water to cure and form the heat-curing resin, so that a new high-strength lining pipe is formed on the inner wall of the oil pipe; (5) cutting pipe orifices at the two ends of the new lining pipe to make the pipeline smooth; and (6) cutting the pipe orifices of the new lining pipe stretching out of the wall of an inspection well. By the method, leakage can be prevented, the pipe orifices are protected, the heat-curing resin impregnated into the lining hose is prevented from being mixed with underground water, and the phenomenon that a part of lining material is poorly cured is avoided.

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.

Images