多层边坡的加权位移反分析方法

利用传统反分析方法对边坡,尤其对含有软弱夹层或者多个土层的边坡进行参数反演研究时,易导致反演结果的不精确。针对分层边坡的位移特点,计算了每个土层的"宏观"位移,并将其用于参数反演。根据滑动面对边坡位移的影响,利用模糊数学中的隶属度概念,求得每个土层的位移权重。在此基础上,构建了新的目标函数,并利用工程实例计算了本文方法和传统方法的目标函数敏感度。结果表明,本文方法的目标函数敏感性较大,效果较好。

Research of weight displacements back analysis for multi-layers slope

When traditional back-analysis technique is preformed to slope, especially to slope with weak intercalated layer and multi-parameters, the back-analysis result may not be accurate. Considering the displacement characteristics of layer slope, the “macro-displacement” of each soil layer is calculated and can be used in back analysis. According to the influence of sliding surface, applying the concept‘membership’ in fuzzy mathematics, the weight of each soil layer is obtained. On these basis, the new objective function is obtained. The sensitiveness of the presented and traditional method is calculated. The results show the effectiveness of the new method.