滑坡稳定性检算中几个问题的探讨

Probe Into Landslide Stability Evaluation

着重讨论了三方面的问题。第一部分讨论了折线形滑动面滑坡稳定性检算的判定指标。除现行较常用的最终剩余下滑力Pn指标外,提出了KT型和R/K型两种判定滑坡稳定程度指标的计算方法;第二部分对"分段平衡法"、"总和平衡法"、"水平投影法"等几种计算稳定系数的方法作了比较分析,提出了它们各自的实际意义,优缺点和适用范围;第三部分讨论了K值在检算滑坡稳定性、反算抗剪强度指标及计算滑坡推力时的不同概念。

There are three issues discussed. First, the landslide stability evaluation judgment indices of the segmented sliding surface are analyzed. In addition to the index of residual downslide force Pn, the evaluation analysis by the landslide stability indices of the KT type and R/K type are introduced. Second, based on the comparative analysis of the calculating methods of the stability indices, such as segmentation equilibrium method, summation equilibrium method, horizontal projection method, and so on , the practical significances, advantages and disadvantages, scope of the application of the methods are proposed. Third, the different concepts of K value in the landslide stability evaluation, back calculation of shear strength parameters and the calculation of landslide thrust are investigated.