工程地质学报2016，Vol.24Issue(4)：501-509,9.DOI:10.13544/j.cnki.jeg.2016.04.003
库水位变化对观音坪滑坡稳定性影响的数值分析
NUMERICAL ANALYSIS OF INFLUENCE OF WATER LEVEL VARIATION ON GUANYINPING LANDSLIDE STABILITY
摘要
Abstract
In order to explore the influence of landslide stability by the change of reservoir water level,a reservoir bank landslide in Southwest China is researched.According to the engineering geological conditions and genetic mechanism of landslide,the effect of variation of water level impacting on the landslide stability and sliding mode based on fluid-solid coupling is analyzed through a three-dimensional numerical model.The plastic zone distribution and X-displacements under nature state,initial impoundment,water level rise and water level fall are obtained through numerical calculation.The stability of reservoir bank landslide under different water levels is analyzed comprehensively.The results of numerical calculation and actual deformation features are also taken into account in the analysis.The results show the follows.The landslide deformation due to the first water storage of reservoir can cause the slope into unstable state.The water level rise has little influences on the landslide stability.The landslide stability is reduced sharply and the slope is likely to occur instability damage when the water level falls.The failure mode of landslide would be diverted from push mode to drag mode after the water storage of reservoir.关键词
库岸滑坡/水位变化/三维数值分析/流固耦合/滑动模式Key words
Reservoir bank landslide/Variation of water level/3D numerical analysis/Fluid-solid coupling/Sliding mode分类
天文与地球科学引用本文复制引用
张岩,陈国庆,张国峰,潘皇宋,何舰..库水位变化对观音坪滑坡稳定性影响的数值分析[J].工程地质学报,2016,24(4):501-509,9.基金项目
国家重点基础研究发展计划(973)项目(2013CB733202),国家自然科学基金项目(41272330,41572283)资助． （973）
