English：

Based on the Second Jiaozhou Bay Subsea Tunnel project, this study investigates the impact ofactive fault fracture zone contact surface morphology, width, and distance from the tunnel on shieldtunnel segment structures through finite element simulations, focusing on the scenario where the shieldtunnel section runs parallel to the Cangkou Fault. The research results show that the interactionmechanism between the hanging wall and footwall directly influences the displacement and stress fields ofsurrounding rock, thereby affecting tunnel deformation and internal forces. The softness degree of thefault fracture zone shows limited impact on tunnel structures. The wider the fault fracture zone and thefarther the distance from the tunnel, the smaller the influence of fault dislocation on the tunnel.