摘要
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。
The stability of the five main landslides,such as Yudonghe landslide,Mayanwan landslide,Dayantang landslide,Liujiatuo landslide and Zhongjiawochang landslides, are studied in the paper.Based on the back analysis of the equalibrium the landslide surface mechanics parameters are obtained.The safety factor and stability reliability of the landslides are illustracted according to the equlibrium method and SARMA method.The slide mechanism of the landslides and parameter sensibilitysis are also obtained by the FEM and parameter experiment analysis.
关键词
坝址
滑坡
稳定性
正交试验
有限元
back —analysis
limit equilibrium calculate
sensibility analisys
parameters experiment
failure probability
FEM
