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本文以清江水布垭坝址区及库首五个重大滑坡(鱼洞河滑坡、马岩湾滑坡、大岩淌滑坡、刘家沱滑坡、钟家屋场滑坡)为研究对象,采用水平投影法反演分析得出各滑坡滑面力学参数,根据反演分析的结果参照工程地质类比确定了各滑坡计算推荐参数。并运用刚体极限平衡法、Sarma法计算了各滑坡在不同工况下的稳定系数,计算了各滑坡的破坏概率及可靠度,运用二维弹塑性有限元分析了鱼洞河滑坡的滑动机理及稳定状况,还运用正交试验及敏感性分析详细讨论了参数对滑坡稳定性的影响及各工况稳定系数的分布规律。所得结论可以作为清江水布垭坝址研究中考虑有关问题的主要依据。
In this paper, five major landslides (Yudong Cave, Mayanwan Landslide, Dayantang Landslide, Liujiatuo Landslide, Zhongjiawuchang Landslide) of Shuibuya Dam site and the first five reservoirs in Qingjiang River Delta are studied. The horizontal projection method According to the results of back analysis, the recommended parameters for each landslide are determined with reference to engineering geology analogy. The stability coefficient of each landslide under different working conditions was calculated by rigid body limit equilibrium method and Sarma method. The probability of failure and reliability of each landslide were calculated. The two-dimensional elastic-plastic finite element method was used to analyze the sliding mechanism of Yudong River landslide. Stability and the effects of parameters on the stability of landslide and the distribution of the stability coefficient of each condition are also discussed in detail by orthogonal test and sensitivity analysis. The conclusion can be taken as the main basis for considering the relevant issues in the research on the dam site of Qingshui Shuibuya project.