Sewage pipeline internal plugging and external grouting construction method

Abstract

The invention discloses a sewage pipeline internal plugging and external grouting construction method. The construction method sequentially includes the following steps that firstly, pipeline internal plugging is performed; secondly, grouting holes are drilled, and cement slurry backfill grouting is performed. In the first step, pipe body leakage points of a sewage pipeline and the peripheries of the leakage points are subjected to chiseling, cleaning and washing, chiseling reaches the concrete surface of the sewage pipeline in the aspect of depth, and then plugging materials are used for compact filling. In the second step, a drilling machine is used for drilling a row of drill holes in each of the soil layers of the left side and the right side of the sewage pipeline, and the drill holes serve as the grouting holes; a row of drill holes are drilled in a soil layer above the center line of the sewage pipeline and serve as the grouting holes; grouting materials are added into a high-speed stirrer to be evenly stirred, and a grouting pump is started to start grouting when the fluidity meets the grouting requirement. By means of the method, compared with a traditional mode that a lining pipe is used, cost is greatly saved, the practical available pipe diameter of the sewage pipeline is not shrunk, and stratum stress is prevented from damaging the sewage pipeline.

Description

technical field [0001] The invention relates to the technical field of construction, in particular to the waterproof and leakage repair of municipal underground pipe networks. Background technique [0002] The urban sewage pipe network includes sewage pipes buried underground. There are several inspection wells at intervals along the length of the sewage pipes. Adjacent inspection wells are generally separated by hundreds of meters (such as 500 meters). [0003] After long-term use of sewage pipes, a large amount of dirt is easy to deposit in them, and the pipes may be partially cracked. Sewage pipes are generally connected by multi-section pipes, and the joints of pipes are also prone to poor sealing after long-term use. In the case of a high urban groundwater level, groundwater will seep into the sewage pipes through damaged pipes and poorly sealed pipe joints. On the one hand, groundwater is wasted, and on the other hand, the workload of sewage treatment plants is greatly...

AI Technical Summary

Problems solved by technology

[0005] 1. High cost

The cost of HDPE pipe and stainless steel pipe is relatively high, and the construction cost is relatively high

[0006] 2. After lining the pipeline, it means that the original sewage pipeline is abandoned, resulting in waste of resources; and the diameter of the lining pipe must be smaller than the diameter of the original sewage pipeline, resulting in the actual diameter of the sewage pipeline shrinking, which does not conform to the design of the original sewage pipeline Require

[0007] 3. There is no protection for the sewage pipeline, and it cannot cope with the damage caused by the stress change of the stratum structure to the sewage pipeline

Images