Study on the model experiment of sectional subway tunnel crossing the ground fissure belt

According to the one section of ground fissure in Xi’an as the prototype, the ground fissure activity effect is studied which distorts to section lining, with the geometry radio 1∶25 model experiment. The following conclusion is drawn by the test result: because each section of lining may satisfy the ration independent distortion and have a small effect on nearby lining, it can adapt to the fissure circumstances. The main lining destruction pattern is sidewall subjected to the hoop extrusion, which often occurs on hanging lager, especially near to the fissure. In the soil body the secondary fissure centratively appears on crown of hanging wall where is 100cm nearby fissure, so the soil body receives the tension and shear function forming the fissure.