襄渝线雨泉沟滑坡稳定性评价分析

因山体坡脚修建厂房切坡开挖，导致雨泉沟隧道出口山体扰动形成滑坡，并导致隧道衬砌大面积产生裂缝，严重危及铁路运营安全。结合极限平衡分析原理的Janbu法和Monte-Carlo随机模拟方法，建立了边坡稳定性分析的可靠度方法，以雨泉沟滑坡为实例，采用该方法对原边坡、病害边坡、治理边坡的稳定性进行了综合分析。分析结果表明:传统的安全系数法，较难反映雨泉沟滑坡处于滑动失稳破坏发展阶段的实际状况，而可靠度方法的分析结果与滑坡的实际状况更为吻合，即病害边坡处于危险状态，治理后的滑坡已稳定安全。

Evaluation Analysis on Stability of Yuquangou Landslide along Xiangfan-Chongqing Railway

As a result of slope cutting for plant building at the foot of the mountain leading to disturbance，landslide is formed at the exit of Yuquangou Tunnel，and then cracks occurs in large area of the tunnel lining，endangering the railway operation. With Janbu Method and Monte-Carlo stochastic simulation based on the principle of ultimate equilibrium analysis，the reliability method in relation to slope stability analysis is established. Taking Yuquangou Landslide as an example，this method is used to carry out comprehensive analysis on the stability of the original，disease and treated slope. The results show that the traditional safety factor method is hard to reflect the actual situation of the landslide in instable，failure or developing stages；however，the analysis result by the reliability method is closer to the actual situation，that is，the disease slope is dangerous，but the treated slope is stable and safe，which could be the reference to similar engineering.