Application of stochastic medium method to predict the influence degree on ground surface construction due to tunnel excavation

When tunnel is excavated, settlement and deformation must be occurred on ground surface above tunnel, and the construction on ground surface must be influenced. By using stochastic medium theory, ground surface movement and deformation of tong youshan double-arch tunnel due to its excavation is calculated, the simplified calculate formulas are deduced, the calculated parameters of the whole tunnel are obtained by using scale method from the parameters of middle lead tunnel, and according these, the influence degree on construction on ground surface due to tunnel excavation is forecasted. The calculating result has some significance to instruct the tunnel construction. 9figs. , 1tab. , 9refs.