基于平面和深部位移联合监测的滑坡精准勘察  

Accurate Survey of a Landslide Based on Plane and Deep Displacement Joint Monitoring

作　　者：李伟[1] 王哲威[1] LI Wei;WANG Zhewei(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China)

机构地区：[1]中铁二院工程集团有限责任公司,成都610031

出　　处：《路基工程》2024年第3期207-212,共6页Subgrade Engineering

基　　金：西藏自治区科技计划重点研发计划项目(XZ202201ZY0021G)。

摘　　要：基于某高速公路高边坡滑坡工程,在地质调查、钻探、原位测试等基础上,引入基于平面和深部位移联合监测模式进行精准勘察。通过平面位移监测确定滑坡周界和滑动方向;通过深部测斜确定滑面位置;通过6孔钻探补充查明空间结构特征。根据深部监测指导钻孔取样获取滑带土指标,检算天然和饱和工况下的稳定性系数分别为1.01、0.98;分析监测数据,滑坡滑动规律为连续降雨期间滑动速率增大,停止施工后滑动速率下降,变形速率从后部向前部逐渐减小,属推移式滑坡;提出清方+重力式罩面的综合整治方案。Based on the landslide project of a high slope in a highway,on the basis of geological survey,drilling and insitu testing,a joint monitoring model based on plane and deep displacement is introduced to carry out accurate investigation.The landslide boundary and sliding direction are determined by plane displacement monitoring.The position of the slip surface was determined by deep inclinometer.The spatial structure features were identified by 6-hole drilling.The slip zone soil index was obtained by drilling and sampling under the guidance of deep monitoring.The stability coefficients under natural and saturated conditions were 1.01 and 0.98 respectively.The slope sliding law of the monitoring data is analyzed and shows that the sliding rate increases during continuous rainfall,the sliding rate decreases after the construction stops,and the deformation rate gradually decreases from the rear to the front.It belongs to thrusttype landslide.The comprehensive treatment scheme of unloading and gravity type cover surface is put forward.

关 键 词：滑坡 勘察 平面位移监测 竖向位移监测 滑坡周界 滑动面 

分 类 号：P642.22[天文地球—工程地质学]