水布垭坝区岸坡卸荷带特性及数值仿真研究

Study on Characteristics and Numerical Simulation for Slope Unloading Zonein Shuibuya Hydropower Project Dam Site Area

围绕水布垭工程坝区岸坡卸荷带类型划分及其成因数值仿真,开展了工程地质调查、岩石力学室内外测试和试验、数值模拟分析和工程应用的研究。在大量野外工作及理论分析的基础上,初步揭示了岸坡卸荷岩体的工程地质特性及岩石力学性质,模拟再现了坝区卸荷带的发育机制,建立了卸荷的概化地质结构模型．已为工程应用．

Focused on the characteristics and numerical simulation of slope unloading zone in the Shuibuya hy-dropower project dam site area,the engineering geological exploration and rock mechanics experiment for thedam site of Shuibuya project are carried out. The fundamental engineering geological property and rock me-chanical characteristics are presented. The genesis mechanism of unloading zone is illustrated by means of nu-merical simulation with nonlinear finite element method. The conceptual unloading geological model is estab-lished. The results are reasonable and practical for the project.