Coupling Numerical Analysis of Seepage and Stress Fields after Excavation of Slope

This paper, based on the mechanism analysis of coupling of seepage and stress fields, builds a mathematical model of coupling on equivalent continuous medium, combined with equations of seepage and stress fields and empirical formula of stress and permeate rate. It also obtains the variation of seepage and stress fields after excavation of slope by the numerical simulation analysis of example. The results show that: (1) The permeability coefficient redistributes with the stress fields, and it increases on the excavation surface. (2) The spill points of free surface rise; the free surface under excavation platform and water head decreases. (3) The body force of seepage near overflow surface doesn’t change significantly. In general, it is disadvantageous to the slope stability.