堆积体滑坡滑带启动变形分析  

ANALYSIS OF ORIGINAL DEFORMATION FOR SLIDING ZONE OF TALUS SLIDE

作　　者：李迪[1] 李亦明[1] 张漫[1] 

机构地区：[1]长江科学院工程安全与病害防治研究所,湖北武汉430010

出　　处：《岩石力学与工程学报》2006年第z2期3879-3884,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金重点项目(50539110);水利部科技创新项目(Scx2003-21)

摘　　要：根据钻孔倾斜仪深部变形监测资料,研究了清江水布垭工程堆积体滑坡滑带的变形机制。发现滑坡的变形起源于滑带的主滑面;然后自下(盘)而上(盘)依次缓慢发展,滑带中的各点自变形启动到变形峰值历时13～28月不等。变形-时间曲线可分成两种类型,其一有匀速、加速、减速、稳定4个阶段,其二没有加速阶段,只有上述其余的3个阶段。变形发展的各个阶段与施工开挖和滑坡加固过程有关,并随滑坡开挖,变形启动和发展;随滑坡加固,变形受阻和逐步趋于稳定。根据上面提出的变形传播特性,提出滑带上盘变形加速启动预警标准,这种标准使预警的变形阶段可控,对监控滑坡安全有重要意义。Based on the monitoring data of landslide deep deformation obtained with inclinometer,the original deformation mechanism for sliding zone of talus slide is studied.It is found that the deformation of landslide starts from the bottom wall(main sliding face of sliding zone),and the development of deformation is progressive from the bottom wall up to the top wall.It lasted respectively for about thirteen to twenty-eight months for different levels of sliding zone.The relation curves between deformation and time are divided into two types.The first has four stages:uniform velocity,increased velocity,decreased velocity,and constant deformation.The second has three stages except for the increased velocity stage.Different stages are related to excavation or reinforcement of landslide.According to the propagation character of deformation discovered recently,the safety forecast standard is proposed.The standard is corresponding to the beginning of deformation acceleration at top wall.It is very important for monitoring and controlling the safety of landslide.

关 键 词：边坡工程 滑带 上盘 下盘 主滑面 启动变形 变形机制 安全预警 

分 类 号：P642.22[天文地球—工程地质学]