Numerical simulations of kinetic formation mechanism of Tangjiashan landslide  

作　　者：Gang Luo Xiewen Hu Chengzhuang Gu Ying Wang 

机构地区：[1]Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu,610031,China [2]Aseismic Engineering Technology Key Laboratory of Sichuan Province,Southwest Jiaotong University,Chengdu,610031,China

出　　处：《Journal of Rock Mechanics and Geotechnical Engineering》2012年第2期149-159,共11页岩石力学与岩土工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China (40772175,40972175);the Scientific Research Fund of Southwest Jiaotong University(2008-A01);the Doctoral Student Innovation Fund of Southwest Jiaotong University;the National Natural Science Foundation of China-Yunan Joint Fund (U1033601)

摘　　要：Tangjiashan landslide is a typical high-speed landslide hosted on consequent bedding rock. The landslide was induced by Wenchuan earthquake at a medium-steep hill slope. The occurrence of Tangjiashan landslide was basically controlled by the tectonic structure, topography, stratum lithology, slope structure, seismic waves, and strike of river. Among various factors, the seismic loading with great intensity and long duration was dominant. The landslide initiation exhibited the local amplification effect of seismic waves at the rear of the slope, the dislocation effect on the fault, and the shear failure differentiating effect on the regions between the soft and the hard layers. Based on field investigations and with the employment of the distinct element numerical simulation program UDEC （universal distinct element code）, the whole kinetic sliding process of Tan iashan landslide was represented and the formation mechanism of the consequent rock landslide under seismic loading was studied. The results are helpful for understanding seismic dynamic responses of consequent bedding rock slopes, where the slope stability could be governed by earthquakes.Tangjiashan landslide is a typical high-speed landslide hosted on consequent bedding rock. The landslide was induced by Wenchuan earthquake at a medium-steep hill slope. The occurrence of Tangjiashan landslide was basically controlled by the tectonic structure, topography, stratum lithology, slope structure, seismic waves, and strike of river. Among various factors, the seismic loading with great intensity and long duration was dominant. The landslide initiation exhibited the local amplification effect of seismic waves at the rear of the slope, the dislocation effect on the fault, and the shear failure differentiating effect on the regions between the soft and the hard layers. Based on field investigations and with the employment of the distinct element numerical simulation program UDEC （universal distinct element code）, the whole kinetic sliding process of Tan iashan landslide was represented and the formation mechanism of the consequent rock landslide under seismic loading was studied. The results are helpful for understanding seismic dynamic responses of consequent bedding rock slopes, where the slope stability could be governed by earthquakes.

关 键 词：Tangjiashan high-speed landslide formation mechahism sliding process numerical simulations 

分 类 号：P642.22[天文地球—工程地质学] O35[天文地球—地质矿产勘探]