【摘要】 结合某一水电工程,分析坝址区主要II级结构面的特征,指出断层F11和五庙坡断层带(F6、F7、F8)对边坡变形和稳定性起控制作用;通过地质分析概化出考虑主要结构面的三维数值分析模型,研究蓄水工况下边坡岩体的位移和剪应变增量分布特征;根据地质分析和数值模拟结果提出蓄水之后边坡特有的变形破坏模式,上盘岩体沿着断层F11剪切滑动从而挤压五庙坡断层带产生压缩变形。对边坡岩体的主控结构面断层F11和五庙坡断层带应进行必要的防渗和加固处理。更多还原

【Abstract】 II order discontinuities in dam area of a hydropower project were studied.It is concluded that Fault F11 and Wumiaopo fault zone(F6、F7、F8)control the deformation and stability of the slope.By geological analysis,the three dimensional numerical analysis model considering important discontinuities was built.Distribution characteristics of displacement and shear strain increment of the slope under the condition of impoundment were studied.Based on results of geological analysis and numerical simulation,specific deformation mode of the slope was put forward,the shear sliding of hanging wall along Fault F11 result in extrusion deformation of Wumiaopo fault zone.It is necessary to reinforce and prevent seepage of the discontinuities(Fault F11 and Wumiaopo fault zone) of the slope.更多还原