Research about the Regularization of Ground Surface Movement and Deformation Caused by Mountain Tunnel Excavation

Abstract

Through analyzing the process of tunnel construction using the finite element method, the authors conclude the regularization of ground surface movement, and take a contrastive analysis with the analysis result of ground surface movement and deformation by using the stochastic medium theory. The research shows that stochastic medium theory is adopted to predict the ground surface movement and deformation of crushed surrounding rock tunnel; the value of subsidence on the tunnel axis is maximal, and far away from the axis direction the value of subsidence decreases; the ground surface horizontal displacement on the cross section of mountain tunnel increases with the increase of distance from the central axis of tunnel, the value arrives the maximum at the point of inflection, after that decreases; when the mountain tunnel depth increases, the area of influence of ground surface movement and deformation enlarges and the strength of influence weakens. The actual ground surface movement of this tunnel by monitoring proves the reliability of this research.