基于强度折减法的库岸滑坡三维有限元分析
基于强度折减法的库岸滑坡三维有限元分析
3D finite element analysis of reservoir bank landslide based on strength reduction method
邓华锋 1, 2，李建林 1 ，王乐华 1 ，周济芳 3 ，邓成进 1
DENG Hua-feng1, 2, LI Jian-lin1 , WANG Le-hua1 , ZHOU Ji-fang3 , DENG Cheng-jin1
(1. China Three Gorges University Key Laboratory of Geological Hazards on Three Gorges Reservoir Area, Ministry of Education, Yichang Hubei, 443002, China;2. College of Civil & Architecture Engineering, China Three Gorges University, Yichang Hubei, 443002, China;3. Er'tan Hydropower Development Company Ltd., Chengdu 610021, China)
Abstract: The genetic mechanism and evolvement process of the reservoir bank landslide were discussed detailedly based onengineering exploration and analyzing environmental geological conditions. And some main factors effecting stability of the landslidewere analyzed emphatically. Through building a 3D FEM model of landslide, the stable situations of the landslide under varioussituations were considered based on the strength reduction method. The result shows that the landslide is steady under the naturalsituation. The front edge of the landslide will be drowned out when the reservoir retains water normally; the safety factor reduces andcan’t meet the requirements of norms. The landslide tends to be more dangerous under rainfall infiltration and rapid drawdown of thereservoir water level. And the landslide will be instable when water storage situation and earthquake situation were considered at thesame time. According to the preceding analysis, the treatment measures of cutting slope and reducing load were presented. Thelandslide is steady under various conditions after being controlled. The relevant conclusions and methods proposed take a good effectin landslide treatment.
Key words: reservoir bank landslide; strength reduction method; genetic mechanism; 3D analysis