黑竹沟变电站滑坡形成机制分析

Analysis on Formation Mechanism of Land-slide in Heizhugou Susbstaion

以黑竹沟变电站滑坡为研究对象,通过工程地质调绘和室内分析,掌握滑坡的工程地质条件和基本特征;运用地质历史分析的方法,研究滑坡的影响因素及形成机制。研究表明:1) 滑坡沿 SE方向展布,平面上呈喇叭形,分布面积51.8 ×104m2,体积为1037 ×104m3,属于特大型滑坡;2) 该滑坡形成机制为倾倒弯曲–拉裂,变形破坏过程主要包括:卸荷回弹倾倒,倾倒变形发展和弯折裂面贯通。

This paper takes the landslide of Heizhugou Substation as the research object,and masters the engineering geological conditions and basic characteristics of landslide through engineering geo-logical mapping and lab analysis,and uses geological history analysis methods to study the influ-encing factors and formation mechanism of landslide.Research shows:1)The landslide spreads along the SE direction,and has a trumpet shape on the plane.The distribution area is 51.8×104 m2 and the volume is 1037×104 m3.It belongs to a large landslide.2)The landslide formation mecha-nism is dumping and bending,and the deformation and failure process mainly includes:unloading rebound dumping,dumping deformation development and bending crack surface penetration.