南京市幕府山某边坡稳定性评价及治理措施研究

Study on the Stability Evaluation and Treatment Measures of a Slope at the Mufu Mountain in Nanjing

针对南京市幕府山某山体滑坡问题,采用极限平衡法和数值模拟法对边坡治理前后的稳定性进行计算分析。结果显示,在天然工况下边坡水平最大位移约9.57cm,处于稳定状态,在暴雨及地震工况下边坡水平最大位移明显增大,稳定性系数降低,且受暴雨影响更为明显,在暴雨工况下边坡处于不稳定状态。采用削坡减载、锚杆加固以及布设截排水沟等措施对边坡进行治理加固,坡体位移得到有效控制,在天然、暴雨、地震工况下边坡稳定性系数分别提高至1.55,1.36,1.42,均超过设计安全系数,边坡处于稳定状态,达到了预期治理目标。

Taking a landslide at the Mufu Mountain in Nanjing as a subject,the limit equilibrium method and numerical simulation method were used to calculate and analyze the slope stability before and after slope treatment.The results show that the maximum horizontal displacement of the slope is about 9.57cm under natural conditions and is in a stable state,and the displacement increases significantly and the stability coefficient decreases under heavy rain and earthquake conditions,and is more obviously affected by heavy rain.The slope is unstable under heavy rain conditions.After the treatment and reinforcement of slope cutting and load reduction,anchor bolt reinforcement and drainage ditch arrangement,the slope displacement is obviously controlled.Under natural,heavy rain and earthquake conditions,the slope stability coefficient is increased to 1.55,1.36and 1.42respectively.The slope stability coefficient exceeds the design safety factor,and the slope is in a stable state,which achieves expected treatment goal.