The Analysis Of Deformation Law And Dynamic Response When The Shield Tunnel Of Beijing Subway Line 14 Down-traversing The Beijing-Tianjing Intercity Railway

As the development of urban railway system, tunnel that across each other has gradually increased. Shield method, which is safe, efficient, are universal applied in various tunnel across programs. However, as shield tunneling can cause stratum loss, which lead to the ground sunk and then result in the deformation of the existed line on the surface of ground. It can be the references for us to take measures or secure the whole line's safe operation, when we forecast and estimate the shield tunneling across the existing line project and analyze the deformation law that across project might cause on the base and the structure of existing line before the execution of the program. This paper based on the Beijing subway line 14 across the Beijing-Tianjin intercity railway project, use the finite-element analysis software analyzed and concluded the effect cause by the shield tunneling. And finally work out a protect measure on the existing line. We will lunch our research program as follows:(1) The finite element analysis software ANSYS is used to build the whole model of soil. And then simulate the effect on the base of Beijing-Tianjin urban line that caused by shield tunneling. Finally, analyze the deformation law of Beijing-Tianjin intercity railway in different conditions.(2) The finite element analysis software ABAQUS is used to build the vehicle-railway-base coupling dynamical model. Analyzed the property and action of running vehicle and effects of the railway dynamic feature, that caused by unsmooth railway after execution. Finally, give advises to secure existing line operation.