赤水市官官公路红旗村滑坡治理方案研究

Study on the Control Schemes for Hongqicun Landslide on Guanguan Highway of Chishui County

2014年8月习水县发生百年不遇特大洪水,洪水冲刷了习水河左岸的红旗村滑坡前缘引起堆积体产生滑动。持续暴雨造成地表水渗入滑体加剧滑坡变形,对官官公路造成危害。为了确保官官公路的通畅及安全,在分析滑坡地质概况和变形特征的基础上,采用传递系数法对滑坡进行稳定性评价。经计算,滑坡在暴雨工况下处于不稳定状态,必须进行加固治理。为此提出了原位加固和改线两个整治方案,从原公路与改线公路的公路等级、行车道宽度、路基宽度、路线长度、滑坡治理工程费用等多方面对两个整治方案进行综合对比,选择原位治理方案为推荐方案。经实际治理效果检验,治理措施合理、有效。

In August 2014,a flood not occurring even in a hundred years occurred in Xishui County.The flood flushed the front of Hongqicun landslide on the left side of Xisliui River,causing sliding of conggeries.The continuous heavy rain causes the surface water to seep into the sliding body which intensifies the landsilide deformation and causes the harm to the highway.In order to ensure theunobstruction and safety of the highway,the stability of landslide goup is evaluated using delivering coefficient metliod on the basis of analyzing the geology and deformation characteristics of the landslide.Upon calculation,the landslide is unstable in rainstorm and must be reinforced.Hence,two regulation schiemes are put forward,namely,in situ reinforcement and line modification,which are compared comprehensively from road grade,lane width,subgrade width,line lengthi and landslide control project cost,etc.of the original highway and modified one and the in situ reinforcement scheme is selected.Through the actual treatment effect,the treatment measures are reasonable and effective.