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Abstract A model experiment with a scaling ratio of 1∶50 to simulate Qipanshi tunnel was carried out to investigate the deformation of overburden soil，the force and the damage feature of the tunnel under the effects of stick-slip dislocation of the thrust fault with the dip angle of 75°. The failure mode and mechanism of lining were analyzed. With the hanging wall rising，the fracture propagated to the surface and formed a triangular shear zone. The width of the shear zone was approximately 0.635D(D is the diameter of the tunnel) in depth at 2.5D，while 0.315D at the dome of the tunnel. Surface displacement was basically in accordance with the law of fault propagation. The longitudinal bending moment in the hanging wall zone was negative and positive in the foot wall zone. In the fault fracture zone，when the dislocation displacement was 0.34D，the cracks due to shearing and compressing occurred at the hinge joint. And some tensile cracks occurred in the local area. Serious damage only occurred at the hinge joint of the tunnel and the lining was slightly damaged. The effect of the anti-dislocation was much better than the tunnel without hinge joints.
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2015, Vol. 34 
