水布垭地下厂房开挖施工过程的数值仿真分析

采用三维非线性有限元方法对水布垭电站地下厂房开挖施工过程进行数值模拟分析，数值仿真分析采用MARC软件。主要包括以下内容：开挖的数值模拟，非线性求解，有限元计算，计算成果的位移分析，应力分析和屈服区分析等。研究整个开挖过程中围岩及洞面的变形状态，应力状态，屈服区分布以及洞室群的整体稳定性，为施工提供依据。

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.