STUDY OF STABILITY OF REMNANT MOUNTAIN BODY IN BACK SCARP OF TANGJIASHAN LANDSLIDE AFTER “5.12” WENCHUAN EARTHQUAKE
HU Xiewen1，2，LUO Gang1，Huang Runqiu2，ZHENG Yong3，LU Xiaoping1，WANG Xuerui1，CHEN Shiyong4，SHI Yubing4
(1. School of Civil Engineering，Southwest Jiaotong University，Chengdu，Sichuan 610031，China；2. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection，Chengdu University of Technology，Chengdu，Sichuan 610059，China；3. General Geo-environmental Monitoring Station of Sichuan Province，Chengdu，Sichuan 610081，China；4. Chengdu Hydroelectric Investigation and Design Institute，China Hydropower Consulting Group，Chengdu，Sichuan 610072，China)
Abstract：Based on the field geological investigations of remnant slope as well as the distribution，scale and penetration depth of crack in slope surface，combined with the mechanism of Tangjiashan high-speed landslide，it is presumed there is still the possibility of that the large-scale landslide except for the sprinkling rockfall occurs on the surface of remnant mountain body. The large-scale landslide failure mode is：tension cracks of slope crest penetrate through bedrock，bedding landslides take place on the middle slope and shear oblique layer on the bottom，and the characteristics can be expressed with tension-sliding-shearing model. According to the failure mode，considering different conditions of natural，continuous rainstorm as well as earthquake，the stability calculation and analysis of remnant mountain body by two-dimensional and three-dimensional broken line potential sliding surfaces are carried out. The results show that the remnant mountain body is stable wholly，but the shallow surface stability is unfavorable，and the control measures to remnant mountain body are proposed.
胡卸文,罗刚，黄润秋，郑勇，吕小平，汪雪瑞，陈世勇，施裕兵. 唐家山滑坡后壁残留山体震后稳定性研究[J]. 岩石力学与工程学报, 2009, 28(11): 2349-2359.
HU Xiewen1，2，LUO Gang1，Huang Runqiu2，ZHENG Yong3，LU Xiaoping1，WANG Xuerui1，CHEN Shiyong4，SHI Yubing4. STUDY OF STABILITY OF REMNANT MOUNTAIN BODY IN BACK SCARP OF TANGJIASHAN LANDSLIDE AFTER “5.12” WENCHUAN EARTHQUAKE . , 2009, 28(11): 2349-2359.
