Abstract: A novel type of socket joint is being used to realize the connection between segments in China, which can meet the requirements of rapid assembly, but its waterproof performance has not been verified. Thus, to guarantee the waterproof performance of segment with socket joint, a waterproof test is conducted on the segment with socket joint applied in the second channel of the Jiangxinzhou sewage collection system in Nanjing, China, is conducted in terms of compression performance test of sealing gasket, waterproof performance test of segment joint, and sliding test of segment longitudinal joint assembly, so as to provide theoretical guidance for expansion and application of segment with socket joint. The results of various tests show the following: (1) The compression force required for the complete compaction of ethylenepropylenediene monomer(EPDM) gaskets for longitudinal joints is small, which can meet the assembly characteristics of longitudinal joints of socket joint. (2) The double sealing gaskets of the longitudinal joint would fall and extrudes during sliding assembly process, which can be avoid by lubrication treatment. (3) The waterproof capacity of the inner and outer EPDM gaskets is more than 0.9 MPa under the designed limit tension displacement condition, which can meet the design waterproof requirements.

Key words: shield tunnel, segment with socked joint, joint waterproofing, double sealing gasket, sliding test, waterproof test