Water supply and drainage pipeline repair technique adopting size film lining method

Abstract

A water supply and drainage pipeline repair technique adopting a size film lining method comprises the steps of: (1) dredging and cleaning a pipeline; (2) inspecting a pipeline internal observing video; (3) producing a working pit; (4) welding a lining pipe; (5) plugging, deflecting and transferring water to the pipeline; (6) internally pretreating and repairing the pipeline to be repaired; (7) drawing the lining pipe into the pipeline to be repaired; (8) sealing the two ends of the lining pipe and embedding a pipe fitting; (9) filling water into the lining pipe and pressurizing; (10) preparing size and auxiliary vacuum casting; (11) keeping the internal water pressure of the lining pipe, and supplying water again after the size is solidified; (12) videoing the inner side of the pipeline and recording the videos after the repair; and (13) the step 1 to step 12 belong to repair construction, taking every two continuous inspection wells as a construction working segment, constructing towards the upstream and downstream sequentially from the inspection well which is next to the working pit, after completing all the working pipeline segments, laying a new pipeline in the working pit, refilling the soil and compacting to restore the pavement; and the pipeline has long service life, high water flow, fast construction speed, less pollution and small influence to roads.

Description

technical field [0001] The invention relates to a repairing process for pipelines, in particular to a repairing process for water supply and drainage pipelines using a serous membrane lining method. Background technique [0002] The existing drainage pipeline repair methods originated in the 1980s, mainly including flip lining method, pull-in lining method, spiral pipe method, short pipe lining method, etc. These methods can fully internalize the damaged pipeline lining construction. Turning the lining and pulling the lining are mainly made of polyester felt material or glass fiber material to prefabricate the cylindrical material, soak the material with mixed resin, push the material into the pipeline with air pressure or water pressure, or directly remove the material from the inspection well Pulled into the pipe, after heating, the resin solidifies to form a new lined pipe. This method is simple and quick to construct, but the amount of resin and chemicals used will have...

AI Technical Summary

Problems solved by technology

Turning the lining and pulling the lining are mainly made of polyester felt material or glass fiber material to prefabricate the cylindrical material, soak the material with mixed resin, push the material into the pipeline with air pressure or water pressure, or directly remove the material from the inspection well Pulled into the pipe, after heating, the resin solidifies to form a new lined pipe. This method is simple and quick to construct, but the amount of resin and chemicals used will have a certain impact on the environment. By increasing the wall thickness of the lined pipe Increasing the strength of the lining pipe requires the use of a large amount of resin, which is costly; the spiral pipe-making method is to make the rolled polyvinyl chloride strip material into a lining pipe on-site through a winding machine placed at the bottom of the inspection well, while spiraling While winding, the formed liner pipe is fed into the pipeline, and then through a special diameter expansion device, the liner pipe is closely attached to the inner wall of the pipeline to be repaired. The lined pipe after construction by this method has low strength and can only be used for The construction of small-diameter pipelines with shallow buried depth; the inner lining of the short pipe is to heat-weld the two-section double-wall corrugated pipe made of polyethylene material in the work pit, and then pull it into the pipeline to be repaired section by section, repeat welding and drawing At last, the annular space between the outer wall of the lining pipe and the inner wall of the pipeline to be repaired is grouted and filled. This method is slow in construction speed and has a large cross-sectional flow loss. It is only suitable for large-diameter construction. The excavation area of ​​the working pit is large, which will affect the road. transportation

[0003] In summary, the repair methods mentioned above all have certain defects, so they need to be further improved.