Abstract：By using stochastic medium theory，the excavation induced ground surface movement and deformation in the transverse and longitudinal direction of Tongyoushan double-arch tunnel are analyzed. And the simplified formulas for complex tunnel cross-section are derived. The fundamental surface moving parameters are obtained by using back-analysis method based on ground surface measurement data of middle cave. Furthermore，by using the scaling method，the surface moving parameters of the main tunnel can be obtained，and eventually the ground surface movement and deformation of the main tunnel due to the excavation can be predicted. According to the results，the influence of excavation on ground surface buildings is estimated. The conclusion obtained in this paper has some significance in guiding the tunnel construction.
