岸坡稳定性影响因子分析及权重确定

摘要

库水和雨水长期反复渗入和渗出严重影响三峡库区滑坡体的稳定性.为研究不同库水升降速率和不同降雨强度下滑坡局部稳定性和整体稳定变化,将降雨、库水位升降、岩土体抗剪强度参数、容重等因素作为影响岸坡稳定的主要因素进行敏感性分析;各主要因素权重的获取不再通过工程经验或专家打分,而是在工程本身地质模型分析基础上,通过不同因子对滑坡稳定性的敏感性来定义的.量化分析得到滑体和滑带岩土体材料强度对滑坡稳定的控制作用,实现了对三峡库区库岸边坡稳定的客观评价.%The stability of landslides in Three Gorges Reservoir area is seriously influenced by long-term repeated infiltration and seepage of reservoir water and rainfall.In order to study the local stability and global stability of landslides under different reservoir water-lifting speed and rainfall intensity,the factors of rainfall intensity,reservoir water-lifting speed,rock and soil shear strength parameters and bulk density are taken as the main factors which affecting the stability of landslides for sensitivity analysis.The weight of each main factor are defined on the basis of the sensitivity of different factor on the stability of landslide which based on the analysis of geological model of project,but no longer gained by engineering experience or expert scoring.The quantitative analyses of sliding body and sliding zone material strength on landslide stability are finally obtained,which achieves the objective evaluation of slope stability in Three Gorges Reservoir area.