3 Dimensional Non-linear Finite Element Analysis for Xiluodu High Arch Dam Abutment Stability

Based on delicate and careful simulation of between-layers and inside layer shear zones in Xiluodu dam site area,deformation and over-load failure mechanism of the dam abutment rock mass are studied quantitatively using 3 dimensional non-linear finite element method,and stability of the dam abutment rock mass is evaluated by way of spot reliability,over-load and comprehensive safety coefficient in this paper.The study results indicate that overall rigidity of the dam abutment is high and its bearing capacity is powerful,at normal pool level over-load safety coefficient of the dam abutment rock mass is 6.0 and comprehensive safety coefficient reaches 4.8.All of them satify the criterion for integral antiskid stability.