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| SIMULATION OF RETROGRESSIVE LANDSLIDE FAILURE PROCESS
BY STRENGTH REDUCTION FEM |
| CAI Wen1，CAO Hong2，LUO Yan3，LUO Guanyong2 |
| (1. Department of Technology Management/NDPP，CCCC Fourth Harbor Engineering Co.，Ltd.，Guangzhou，Guangdong 510231，China；2. State Key Laboratory of Subtropical Building Science，South China University of Technology，Guangzhou，Guangdong 510640，China；3. Research Institute of Geotechnical，Engineering Technology Research Co.，Ltd. of CCCC Fourth Harbor Engineering Co.，Ltd.，Guangzhou，Guangdong 510230，China) |
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Abstract The retrogressive failure process of the slope，which has the characteristics of steps failing from slope toe towards slope crest，is simulated by several rounds of calculation in strength reduction finite element method (FEM). During simulation process，strength reduction factor is determined by dichotomy method for each calculation round. Weight of the locally failed soil is converted into slope surface load based on the static equilibrium assumption. The gradually becoming smaller reduction factor in the successive calculation rounds is adopted as the control criterion to determine whether it is a retrogressive landslide. Left abutment landslide of Jinjiang reservoir is taked as engineering example. The simulation results，which is basically in accordance with actual situations，prove that the simulation method is a feasible method.
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Received: 12 May 2010
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2011, Vol. 30 
