JOINT INTERACTION MODELS FOR SHIELD TUNNEL SEGMENT REINFORCED BY SECONDARY LININGS
盾构隧洞双层衬砌接头相互作用模型

The principle and results of load test on double-layer linging joint are discussed simply. Based on the above results, three joint interaction models are proposed according to the different structural forms of joint between the primary and the secondary linings. The linging fracture created by tensile force is simulated, and the calculational result is compared with the test data. It is shown that reducing the stiffness of lining in the case of occurrence of fracture is reasonable, and the model result is in good accordance with the test data.