Abstract:

The feasibility to build largescale watersupplying tunnels by longdistance shield tunneling method is discussed, the problems, such as the high internal water pressure and the water leakage, encountered in the design of the longdistance watersupplying tunnel bored by shield machines are solved and optimization recommendations are made to the design of the tunnels, with the design of Qingcaosha Watersupplying Tunnel in Shanghai as an example. The paper can provide more rational and practical references for the design of other longdistance watersupplying tunnels bored by shield machines in the future.

Key words: long distance, shield tunneling method, water-supplying tunnel, internal water pressure, single-shell lining