Analysis and Research on 3D Simulation for Stability of Xiayahe Multi － stage Landslide
HE Shu － jun1，LIU Jing － ru2，WU Shu － ren3，ZHANG Chun － shan3，YE Si － yuan3
1． China Zhonghua Geotechnical Engineering Co． Ltd，Beijing，102600，China; 2． Unit 92181，People＇s Liberation Army of China，Gaobeidian，Hebei 074000，China; 3． Chinese Academy of Geological Sciences，Beijing 100081，China
Abstract：Research purposes: In order to reproduce the processes and the formation of Xiayahe landslide，the 3D geological simulation analysis for Xiayahe landslide was made and the simulation result was compared to the analysis result of the stability of the multiple － stage landslide in loess area with the Monte － Carlo simulating method．
Research conclusions: The research results showed that: in natural state，the simulated safety factors of the sliding surface of the 1，2，3and 4 stages were respectively 1． 27，1． 30，1． 56 and 1． 73 and it indicated that the instability would not appear to the four sliding surfaces in a given sliding surface spatial form and in the natural geotechnical parameters conditions． The simulated safety factors of the sliding surface of the 1，2，3and 4 stages were respectively 0． 96，1． 15，1． 48 and 1． 60 when the simulation calculation was made for the geotechnical parameters in the saturation state． If the safety factor fs = 1． 2 was taken as the critical value，it showed in the saturation state，the obvious instability phenomenon appeared to the1 － stage sliding surface，the safety factor of the 2 － stage sliding surface was 1． 15，being at the edge of instability，and the safety factor of the 3 and 4 － stage sliding surfaces was bigger than 1． 2，being in the stable state． These conclusions were basically consistent with the analysis results of the multi － stage landslide in loess area with the Monte － Carlo simulating method．
何淑军，刘景儒，吴树仁，张春山，叶思源. 夏呀河多级滑坡三维稳定性模拟分析研究[J]. 铁道工程学报, 2011, 28(11): 24-29.
HE Shu － jun，LIU Jing － ru，WU Shu － ren，ZHANG Chun － shan，YE Si － yuan. Analysis and Research on 3D Simulation for Stability of Xiayahe Multi － stage Landslide. 铁道工程学报, 2011, 28(11): 24-29.
He Shujun，Zhang Chunshan，Wu Shuren， etc．Reliability Analysis of the Multi － layer Landslide in Loess Based on the Monte － Carlo Simulating Method ［J］． Geological Bulletin of China，2008 ( 11 ) : 1822 －1831．
He Shujun，Zhang Chunshan，Chen Zhihua，etc． Risk Evaluation for the Xiayahe Landslide in Weibin Districtt of Baoji City in Shanxi Province ［J］． Geological Bulletin of China， 2009( 8) : 1064 － 1076．
Song Xiangjun． Landslide Characteristics and Control Countermeasures between K 22 + 000 ～ + 220 Section along Shi － Zhong Highway［J］． Journal of Railway Engineering Society， 2011( 7) : 42 － 47．
［6］ 何淑军． 陕西宝鸡市渭滨区地质灾害风险评估研究［D］．北京: 中国地质科学院． 2009．
He Shujun． Study on Geo － hazard Risk Assessment in Weibin District of Baoji City in Shanxi Province［D］．Beijing: Chinese Academy of Geological Sciences， 2009．
2011, Vol. 28 
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