基于点安全系数法的大型堆积体变形滑坡稳定性分析

Stability Analysis of Large Accumulation Deformation Landslide Based on Point Safety Factor

文中以沙坝2号大型堆积体滑坡为例,在研究实地工程地质特征、位移特征及位移监测实测资料等基础上,对滑坡的变形特征进行局部差异性分析,进而分析坡体的局部稳定性特征,并利用FLAC^(3D)建立地质力学模型,采用点安全系数法模拟分析该滑坡的力学行为,进行局部稳定性分析,使坡体的局部稳定性与变形特征相吻合。通过对沙坝2号滑坡的地质展开调查、现场监测和稳定性分析,说明滑坡的局部稳定性存在差异,点安全系数法可较准确地计算滑坡体的局部稳定性,也能综合表征滑坡的整体稳定性。

Taking the large accumulation landslide of Shaba No.2 as an example,based on the full study of the field engineering geological characteristics,displacement characteristics and displacement monitoring data,the local differences of the deformation characteristics of the landslide was analyzed.Then the local stability characteristics of the slope were analyzed,and the geomechanical model was established by using Flac^(3D).The mechanical behavior of the landslide is simulated and analyzed by using the point safety factor method.The local stability of the slope was consistent with the deformation characteristics.Through the geological investigation,field monitoring and stability analysis of Shaba No.2 landslide,it shows that there are differences in the local stability of the landslide.The point safety factor method can accurately calculate the local stability of the landslide and comprehensively characterize the overall stability of the landslide.