Abstract:JDrainage pipe network is an important urban infrastructure. With the extension of service time, some pipe networks begin to have some different problems and need to be repaired urgently. The repair of old pipe network is an important part of sewage quality and efficiency improvement, and black and odorous water treatment. The selection of repair process of defective pipe network is very important. Combined with the investigation results of the 202.22 km present drainage pipeline in a district in Shenzhen, two repair methods of excavation and pipe replacement, and trenchless repair of structural defective pipe network are compared. The applicable conditions, advantages and disadvantages of each repair technology are analyzed. The factors that should be considered in the selection of repair process are introduced in detail. The application of trenchless repair is discussed.
