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对西南某河流改道导致边坡变形的破坏模式进行调查,总结边坡在坡向与岩层倾向间夹角变化条件下的变形破坏特征。采用成都理工大学开发的边坡块体稳定性分析系统(SASW),模拟计算边坡中坡向与岩层倾向在不同夹角情况下边坡楔形块体的稳定性。根据模拟分析结果,建议采用夹角40°作为岩质顺向边坡和斜向边坡的划分界限。岩质顺向边坡进一步划分为顺层顺向边坡和切层顺向边坡,并采用夹角20°作为其划分界限。
This paper investigates the failure mode of slope deformation caused by the diversion of a river in southwest China and summarizes the deformation and failure characteristics of the slope under the condition of the angle between the slope and rock formation. The slope block stability analysis system (SASW) developed by Chengdu University of Technology was used to simulate the stability of the slope wedge-shaped block under the condition of different included angles between the slope orientation and the rock formation inclination. According to the result of simulation analysis, it is suggested to use the included angle of 40 ° as the demarcation limit of forward slope and slope of rock. The forward slope of the rock is further divided into a forward cistern and a progressive cistern, and the angle of 20 ° is used as the dividing boundary.