Numerial simulation analysis of the excavation process of Shuibuya underground powerhouse

Numerical simulation analysis was performed on the exravation process of underground powerhouse of Shuihuya hydropower station based on three-dimension nonlinear finite element method. It adopted the MARC software, including the numerial simulation of excavation, nonlinear solution, finite element calculation, displacement analysis on the calculation results, stress analysis, and the analysis of yield area. The study was focused on the stress and deformation of cave and adjacent rock, the distribution of yield area,and the integral stability of the underground cavern group. The research results provides the basis for the construction of the project.