文县郭家坡滑坡形成机理与稳定性研究

Study on Formation Mechanism and Stability of Guojiapo Landslide in Wenxian County

选择受地震影响的郭家坡滑坡作为研究对象,在滑坡孕灾背景条件调查、大比例尺平面测绘、工程地质勘查、岩土测试等基础上,对其发育特征和形成机制进行了研究,然后运用有限元模拟定量分析了滑坡现状稳定性。结果表明:地震是滑坡整体破坏的主要诱因,高陡斜坡和裂隙发育的地层是造成郭家坡滑坡发生多级滑动的内在因素,滑坡在降雨饱水工况和地震工况下局部处于不稳定状态。

The paper took Guojiapo landslide which was affected by earthquake as a study object,studied the development characteristics and formation mechanism based on the survey of landslide disaster-pregnant background condition,large scale plane surveying and mapping,engineering geological exploration and geotechnical testing and quantitatively analyzed the current stability of the landslide by using finite element simulation.The outcomes show that earthquake is the main inducement of whole landslide failure.High and steep slope and the development of fractures are the internal factors that causes multi-stage sliding of Guojiapo landslide and the partial of the landslide is unstable under the conditions of precipitation saturation and earthquake.