Research and Application of Trenchless Repair Technology for Urban Drainage Network
The problems of pipeline aging and damage,blockage,poor hydraulic condition and leakage during the operation of urban drainage network are analyzed.The commonly used trenchless repair technologies are summarized,including local resin curing repair technology,stainless steel double expansion ring repair technology and ultraviolet curing repair technology.The working principle,advantages and disadvantages and process flow of different repair technologies are expounded.The practical application of UV curing repair technology is introduced.The flow capacity of the pipeline is improved and the hydraulic conditions are improved.