This paper describes the seismic behavior in the longitudinal direction of shield tunnels located at an irregular ground with considering the effect of the secondary lining. A series of shaking table model tests was carried out and the response analyses of the shield tunnel were performed with emphasis on the time-history seismic deformation method. The investigation concerns vibration characteristics of the tunnel and the surrounding ground, the dynamic interaction between tunnel and ground, as well as the validity of the analytical model. In the model tests, the irregular ground with an inclined interface between alluvium and diluvium was considered, and the longitudinal rigidity of the tunnel with the secondary lining and the exciting direction were focused, moreover materials of ground and tunnel were chosen according to the similarity law. In the response analyses, the time-history response displacements of the free ground were analyzed by using 3-D dynamic FEM and the 1-D multiple reflection response method, respectively. An analytical model in the longitudinal direction of the shield tunnel with the secondary lining for the seismic deformation method was proposed and the validity of the model is verified by model tests.
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