考虑地下水影响的滑坡稳定性分析

以焦-柳铁路某滑坡为工程背景，根据工程勘察和位移监测结果确定滑动面形状与位置，同时考虑地下水的影响，采用推力传递系数法对滑坡进行稳定性分析，其滑动面强度指标（粘聚力c和内摩擦角 ）根据最小二乘法反分析确定。结果表明：该方法能定量分析地下水位降低和疏干地下水对滑坡安全系数的影响，有助于根据排水措施的实际效果，经济合理地确定支挡结构的设计方案；利用多个断面的监测资料确定c， ，能减小监测资料的随机性影响，反映滑动面土体的整体状况。其分析方法与结论可供同类工程借鉴。

Stability analysis of landslide under influence of groundwater

The shape and location of the sliding surface was confirmed by engineering investigation and displacement monitoring of the landslide of Jiao-Liu Railway project, and the thrust transfer coefficient method was performed to analyze the stability of the landslide, in which the influence of groundwater was taken into account. The strength indexes of soil on sliding surface, cohesion c and angle of internal friction , were obtained by back-analysis based on least-squares method. It shows that the method can analyze quantitatively the contribution of dewatering to safety factor of the landslide, so that the retaining structure is designed economically. The strength index that solved by multi-sections data represents the overall character of the soil on sliding surface, which reduces the randomness influence of tested data. The method and the conclusion can be used for reference by similar projects.