基于降雨滑坡模型的两种边坡破坏模式研究  

Rainfall landslide model-based study on failure modes of two kinds of slope

作　　者：陈乔[1] 徐烽淋 朱洪林[1] 张阔 谢治国 陈吉龙[1] CHEN Qiao;XU Fenglin;ZHU Honglin;ZHANG Kuo;XIE Zhiguo;CHEN Jilong(Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Science, Beibei 400714, Chongqing, China;Chongqing Filling Shale Gas Environmental Protection Research and Development and Technical Service Center, Filling 408000, Chongqing, China;Chongqing Environmental Protection Engineering Research Center of Shale Gas Development, Fi l l ing 408000, Chongqing, China;GuiLin University of Technology, Guil in 541004, Guangxi, China;Chongqing Mineral Resources Development Company Limited, Yubei 401123, Chongqing, China)

机构地区：[1]中国科学院重庆绿色智能技术研究院,重庆北碚400714 [2]重庆市涪陵页岩气环保研发与技术服务中心,重庆涪陵408000 [3]重庆市页岩气开发环境保护工程技术研究中心,重庆涪陵408000 [4]桂林理工大学,广西桂林541004 [5]重庆矿产资源开发有限公司,重庆渝北401123

出　　处：《水利水电技术》2018年第4期138-144,共7页Water Resources and Hydropower Engineering

基　　金：国家自然科学基金项目(41502287);重庆市基础与前沿研究计划重点项目(cstc2015jcyj BX0120);重庆市社会事业与民生保障科技创新专项项目(cstc2017shms A120001);中国科学院科技服务网络计划项目(KFJ-SW-STS-180)

摘　　要：实验室滑坡监测模型是评估滑坡破坏方式规律的一种常见有效的手段,为研究边坡的几何形态对边坡破坏模式的影响,在考虑"降雨是引发滑坡的主要因素"的前提下,基于降雨引发滑坡的渗透特性构建降雨型滑坡监测模型,在对相关仪器设备进行检测和校准的基础上,模拟了近似无限边坡和削平坡顶的两种几何形态在相同降雨事件中的失稳状况,同时,结合SEEP/W进行了数值模拟计算,并进行对比研究。结果表明:与传统的大面积或者整体破坏的滑坡有所不同,对于非整体破坏滑坡,特别是从坡脚开始的降雨引发的牵引式浅源滑坡,尽管水平坡顶降低了整体下滑力,但是更易由降雨入渗导致浸润线升高或孔隙水压增加,导致较早发生大范围破坏。研究成果对完善边坡稳定方案设计方法具有一定指导意义。In order to study the influence of the geometric shape of the slope on the slope failure mode,a rainfall landslide monitoring model is established through the study made on the seepage characteristics of the landslide induced by rainfall under the premise of that rainfall is considered as the major factor to cause landslide,and then the instabilities of two kinds of slope geometric shapes,i. e. the approximate infinite slope and flattened slope crest,under the same rainfall events are simulated on the basis of the testing and calibrating the relevant equipment,meanwhile,the comparative study on the numerical simulation is carried out in combination with SEEP/W. The result shows that differing from the conventional landslide with large area or integral failure to some extent,the landslide with non-integral failure,especially the shallow retrogressive landslide from the slope toe caused by rainfall are more prone to lead to the rise of the phreatic line or the increase of the pore pressure,and then induce extensive damage,though the overall down-slipping force is decreased by the flattened slope crest. The study result has a certain referential significance for perfecting the design mode for slope stability scheme.

关 键 词：滑坡模型 降雨装置 传感器标定 排水监测 几何形状 

分 类 号：P694[天文地球—地质学]