基于影响线分析的滑坡削方减载稳定性计算

削方减载因其方法简单、施工方便和抗滑效果良好，已成为常用的滑坡治理措施之一，但削方位置的不同对坡体稳定性的影响差异较大。为了直观说明这种影响，借鉴结构力学中移动荷载作用下的影响线概念，以削方减载位置的不同作为可变荷载，以每次削方减载情况下对应的稳定系数作为影响量，建立相应的滑坡削方减载影响线计算分析方法，并根据稳定系数的大小，结合工程实际，确定最优的滑坡削方减载位置。最后以某滑坡为实例，对其不同位置情况下的削方减载对应的稳定系数进行了统计，根据稳定系数的大小，结合坡体情况，直观地给出了最优的卸载位置，为合理和科学地进行坡体削方减载提供了依据。该方法计算原理简单，结果清晰直观，可对同类滑坡治理工程提供参考和借鉴。 

Calculation of stability of landslide with deloading trough rock and soil removal based on influence line analysis

Because of its simple method, convenient construction and good anti sliding effect, deloading through rock and soil removal is one of the commonly used measures for landslide control. But different cutting position has different effects on the stability of a slope. In order to illustrate intuitionally this kind of influence, this paper learns from the concept of the influence line of moving load in structural mechanics. By reducing load in different position as the variable load and reducing load to each case corresponds to the stability coefficient as the value of influence, the analysis method for the influence line of the load reduction on the landslide was put forward. According to the size of the stability factor and combined with the engineering practice, the optimal cutting position of the landslide was determined. Finally, taking a landslide as an example, statistics were made for the stability factor corresponding to deloading through rock and soil removal at different position. According to the size of the coefficient of stability and combined with the situation of the slope, the optimal unloading position was given, which provides the basis for the reasonable and scientific load reduction. The method is simple in calculation and the result is clear and direct, can provide reference for similar landslide treatment engineering.