【作者】 年廷凯； 张克利； 徐海洋； 李东晨；

【Author】 NIAN Tingkai~(①②) ZHANG Keli~(①③) XU Haiyang~①LI Dongchen~①(①Institute of Geotechnical Engineering,Dalian University of Technology,Dalian 116024) (②State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024) (③China Construction of Guizhou Scientific Research and Design Institute Ltd.,Guiyang 550006 )

【机构】 大连理工大学土木水利学院岩土工程研究所； 大连理工大学海岸和近海工程国家重点实验室； 贵州中建建筑科研设计院有限公司；

【摘要】 以大型滑坡体-岔鞍滑坡为地质背景,本文采用三维有限元强度折减法,深入探讨开挖、地下水、交通荷载和拟静力地震荷载等因素对三维边(滑)坡稳定性及临界滑动面的影响;在此基础上,着重分析了该滑坡体在多因素条件下的破坏模式及滑动机制。结果表明:该边坡整体滑动的主要诱因是削坡开挖,即原压脚岩土体被开挖卸除,从而减小了阻滑段的抗滑能力,而地下水/降雨入渗则加速了滑坡的进一步发展;该边坡局部滑动的主要诱因是交通荷载,其控制着路堤的局部稳定性。更多还原

【Abstract】 Elasto-plastic finite element method(EP-FEM) based on strength reduction technique(SRT) is adopted to analyze a large engineering slope-Cha’an landslide.The effect of excavation,groundwater,local surcharge/traffic loads,and pseudo-static seismic loading on the slope stability and the critical sliding surface is investigated in details. On the basis of these,the failure mode and sliding mechanism of this landslide under multi-factor effect are discussed.The calculated results indicate that excavation is the major factor inducing the overall slide,while groundwater or rainfall infiltration leads to further development of the landslide.In particular,traffic loading is the key factor influencing the local instability of slope.更多还原