NUMERICAL ANALYSIS OF DISLOCATION OF GROUND FISSURE ON THE METRO TUNNEL PARALLELING TO THE GROUND FISSURE'S STRIKE

The Xi'an metro line 3 paralleling to the strike of f7ground fissure, pass through locally hanging wall of the f7ground fissure. Based on the maximum activity values forecasted by the level monitoring datum, the influence of dislocation of ground fissure on metro tunnel was researched which parallel to the f7ground fissure's strike, utilizing the numerical method. The dislocation of ground fissure occurs in characteristic loess soil strata which are compose of loess soil, paleosol and silty clay. By gradually changing the distance between the out layer of metro tunnel liner and the f7ground fissure, the deformation and stress of the metro tunnel liner was computed under six calculation conditions. The results show that the tunnel liner is safe and has safety margin to some extent when the distance is 30meters between the out layer of metro tunnel liner and the f7ground fissure.