折线形滑面边坡稳定性分析与预应力锚索支护研究

自然界中的边坡潜在滑面多为折线形。采用极限分析上限定理研究了折线形滑面边坡的稳定性及其锚索支护问题。通过竖直条分法，将坡体在各折线段处分割成多块体，分析各多块体之间的速度相容场，根据内能耗散与外功率之间的关系给出安全性系数，从而判断边坡的稳定性。对于危险性边坡，采用锚索进行支护，研究了锚杆支护对边坡稳定性的影响。通过马富滑坡的稳定性分析与锚杆支护方案，验证了该方法的合理性。

Study on Stability of Slope with Folding Sliding Surface and the Support by Prestressed Anchor Cable

Most of potential sliding surfaces of slopes in nature are folding. In this paper, upper bound theorem of limit analysis was used to study the stability of such slopes and its support by anchor cable. By vertical slice method, the slope was divided into many slices at each fold line, then the speed consistency field between the slices may be analyzed. According to the relation between internal energy consumption and external power, the safety factor was given so as to judge the slope stability. For dangerous slope, it was supported by anchor cable, then the effect of the bolting on the stability was studied. Depending on stability analysis of Mafu Landslide and its bolting support scheme, the reasonability of this method was demonstrated.