The aim of this paper is to study the characteristics of longitudinal deformation and mechanical response of a tunnel under active fault dislocation. A 2-D longitudinal numerical model of the tunnel is established based on the Winkler’s elastic foundation theory. Using this model

the mechanical response of the tunnel liner under various fault conditions is investigated. The results show that the tunnel would have better anti-dislocation performance with weaker rock mass of fault

larger angle between fault and tunnel axes

wider fault width

and thicker tunnel lining.Under the condition that flexible hinge joints on the tunnel lining were applied to improve the anti-dislocation performance of the tunnel

the anti-dislocation performance would be enhanced with a smaller length and a lower material strength of the hinge joint. The conclusions may provide some reference for the anti-dislocation design of tunnels crossing active faults.