滑坡计算参数反演分析的优化算法

对三峡库区已有勘察资料的滑坡进行分类统计，得到滑带土抗剪强度参数的分布函数，并计算其天然强度和饱和强度的相关关系。根据滑坡宏观变形特征确定滑坡稳定性评估指标，用剩余推力法建立滑坡反演分析的平衡方程，并通过敏感性分析得到抗剪强度参数对滑坡稳定性影响程度的比值。提出了反演参数的优化算法，将反演得到的一系列参数值与统计数据进行对比分析，兼顾了滑坡的区域共性和个体特性。

Optimization Algorithm of Back Analysis of Landslide's Calculation Parameters

Through classification statistic of the investigation data of landslides in the Three-gorges Reservoir, the author obtained the distribution functions of shear strength parameters of sliding zone, and calculated the correlation of natural .strength parameters and saturation strength parameters. The evaluation index of stability was determined by analyzing deformation beavior of the landslide, The balanced equation of back analysis was established by the residual thrust methqd. The ratio of degrees that shear strength parameters influenced the stability of landslide was calculated by sensitivity analysis. The paper pro- posed the optimization algorithm to access reasonable factors of back analysis, and contrasted the series of factors of back analysis and the statistic data. This method considered both area common property and individual character of landslide.