Abstract:Based on the Xi¢an metro line No.2 passing through ground fissure active zones,the effect of ground fissure movement on open-cut metro tunnel with rectangular integral lining was studied by a large-scale structural model test with geometric proportion of 1∶5. The test results show that with settlement of the hanging wall of ground fissure increasing,the contact pressure of tunnel top increases in the hanging wall but decreases in the footwall;the contact pressure of tunnel bottom increases in the foot wall but reduces to zero in the hanging wall. When the settlement of hanging wall of ground fissure reaches 20 cm,the tunnel bottom in the hanging wall comes apart from soil,and tunnel lining within 2.5 m from ground fissure in the footwall firstly is found with cracks,so the foundation treatments such as grouting are needed in time. At the meantime,tunnel bottom is basically in compression;tunnel top is in tension in the footwall and initially in tension then in compression in the hanging wall. The deformation and failure model of tunnel induced by ground fissure is tensile failure,and tunnel cracks mainly appear in the footwall of ground fissure,but tunnel located in the hanging wall is basically good,which is just adverse to that the damage of buildings or structures on the ground surface caused by the ground fissure mainly in the hanging wall. The conclusions can be presented as the reference to structural design and prevention measures of metro tunnel passing through the ground fissure active zone.