东深供水改造工程石头岭滑坡稳定性与加固方案的研究

Research on Stability and Reinforcing about the Shitouling Slide in the Water Supply Reconstruction Project from Dongjiang to Shenzhen

通过对滑坡体的概况及水文地质条件的总结和分析,认为:边坡破坏类型为松散堆积层滑坡,主要是坡残积土在持续的降雨条件下,降雨在松散坡体内聚集,加之坡脚处炭质泥岩遇水软化作用所导致的坡体浅层滑动。在两个最危险滑动面上,分别对该滑坡进行了门架式双排抗滑桩、预应力锚索抗滑桩加固方案设计,并对这两种加固方法进行了比较。利用SlopeCAD、有限元强度折减法对加固后的边坡进行了稳定性分析,计算发现,加固后,边坡的安全系数有较大程度提高,边坡处于稳定状态。

Through the conclusion and analysis for slide’s general situation and hydrogeological condition,it can be found that the type of destruction is the loose accumulative formation.The reason for destruction is continuous rainfall and the strength of soil decreases.Research is done on most dangerous failure plane.The reinforce scheme was designed using portal double row anti-sliding piles and prestress anchor cable.The stability of slope was calculated using SlopeCAD and strength reduction FEM after reinforced,the safety factor is large than 1 and slope is stable.