基于受力状态的雾江滑坡体类型判定  

Determination for the Type of Wujiang River Landslide Based on Forced State

作　　者：袁斌[1] 黄耀英[1] 陈勋辉 李春光[3] 万智勇[1] 左全裕 

机构地区：[1]三峡大学水利与环境学院,湖北宜昌443002 [2]黄河上游水电开发有限责任公司,青海西宁810008 [3]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉430071 [4]湖南涔天河工程建设投资有限责任公司,湖南永州425500

出　　处：《防灾减灾工程学报》2017年第4期675-680,共6页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家自然科学基金项目(51209124);国家重点基础研究发展计划(973)项目(2011CB013505)资助

摘　　要：从受力状态判定滑坡体的类型是滑坡体合理治理的前提。针对涔天河扩建工程雾江滑坡体的滑坡类型问题,首先对滑坡体地质特征和边坡原型变形监测进行了分析;然后以力学参数地质建议值及室内试验参数为基础,对4个典型剖面分别进行岩土参数的综合反演,再用摩根斯坦-普赖斯法建立计算模型进行稳定性分析。分析表明:雾江滑坡体以缓慢蠕滑变形为主,滑坡前缘浅层拉裂坍滑可能性较大,而滑坡整体快速滑动的可能性较小;水库蓄水前和蓄水后,坡脚处于薄弱区,最易率先发生滑动并牵引其他滑体相继发生滑动,从而判定雾江滑坡体属于牵引式滑坡。The understanding landslide types from stress state is critical for rational landslide con- trol. In order to determine the landslide type of Wujiang landslide in the Centianhe expansion en- gineering, in this study, we have analyzed the geotechnical characteristics of the landslide and the monitoring data of slope deformation. Then, the comprehensive inversion of geotechnical param- eters for 4 typical sections was carried out respectively based on the suggested values of the me- chanical parameters and the parameters of the laboratory test. What ~s more, the calculation models of the 4 typical sections was established and analyzed based on Morgenstern-Price meth- od. The analysis shows that slow creep deformation currently exits in the Wujiang landslide. It is probable that the shallow landslide at the leading edge is likely to fracture and collapse, while the whole landslide is less likely to slide quickly. It is most likely to take the slope toe which is in the weak area firstly to slide and then pull the other landslide to slide during the dam construction and reservoir operations. So it is concluded that the landslide is a retrogressive landslide .

关 键 词：滑坡 稳定性分析 安全系数 变形特征 

分 类 号：P642.22[天文地球—工程地质学]