基于高密度电法的滑坡路段地基勘察与稳定性评价

准确地确定滑体的空间形态和稳定状态是制定滑坡治理方案的基础。在北黑高速扩建工程滑坡体勘察中,利用GPS卫星定位系统对山体滑坡路段的地形图进行了测绘,初步确定的滑坡体的周界。以主滑动面为中心线,布设了四条高密度电阻率法测线,并在特征点位置进行了地质钻探。利用高密度电阻率法测量反演结果结合地质钻探资料判断,该滑坡属于堆填土滑坡,一期工程的弃土带动其下坡积的粉质粘土沿基岩顶面产生滑动。利用GPS全球定位系统结合钻孔测斜管对滑坡进行了监测,准确地确定了滑动面位置,判断了滑体稳定状态,测得了滑体的移动方向及移动速率。

Investigation and Stability Evaluation of Landslide Road Foundation Based on High Density Resistivity Method

Accurate determination on the spatial form and steady state of landslide is the basis of formulating administration scheme.During the landslide investigation of Beihei expressway expansion project,the topographic maps of landslide section were surveyed and drawn using GPS.And the perimeter of landslide was preliminarily determined.Taking the main sliding surface as the center line,four measuring lines of high density resistivity method were laid,and geological drilling was conducted in the feature point position.Judging from the combination of the inversion result of high density resistivity method with geological drilling material,the landslide belonged to landfill soil landslide.The silty clay accumulated downhill slided along the bedrock surface driven by abandoned soil of first stage project.GPS and the drilling inclined pipe were used to monitor the landslide in order to accurately determine the sliding surface position,judge the stable state of slip mass and measure traversing direction and speed of slip mass.