Abstract:Despite the rapid development of economy and the continuous expansion of urban and rural construction scale in China， enough attention is not paid to the construction and maintenance of pipelines in many places， especially the backward construction of underground sewage pipe networks， resulting in some township rivers being plagued by underground sewage， debris fermenting in the pipelines on sunny days with an unpleasant odor， and pipeline blockage in rainy days prone to waterlogging. Taking the “zero direct discharge of sewage” in the whole Dayun Town， Jiashan County as an example， the closed circuit television detection technology is firstly used to detect and analyze all pipelines， and then the appropriate trenchless repair methods are selected after detection and analysis. In this project， a local resin curing trenchless repair process is used， and its construction process is introduced. The practice shows that the local resin curing method has the characteristics of fast construction， guaranteed construction quality and small impact on the surrounding environment， and can be applied in similar projects with zero direct discharge of sewage.
