Three dimensional computer modeling for the stress and deformation interaction of rock slope and tunnel

The interaction between the rock slope and tunnel is very important in geotechnical engineering for they will affect each other. In some cases, tunnel is first excavated long time ago, then with the time passed on, the stress in the rock mass reaches its equilibrium state, and the deformation of the rock mass becomes unchanged. In the following, the surface rock mass is excavated to form a slope, but due to the excavation of the tunnel had disturbed the stress and deformation of rock mass, the slope stability and excavation response will be different from the cases where there does not exist the tunnel excavation in the rock mass. So the interaction between the slope and tunnel need to be considered. In the past, the simplified engineering method is chosen to solve these problems. Recently, due to the rapid advances in computer technology and sustained development, the numerical modeling method has been pushed to the forefront of geotechnical practice, which explores a new way for geotechnical designing. So in the present paper, one slope of rock mass with tunnel in it is chosen as the engineering background, the numerical model is built to realize the modeling for the interaction between the slope and tunnel; two situations are set to study the differences of stress and deformation characteristic between the slope in rock mass with tunnel and without tunnel, whose results can give some guidance for the real practice.