Simulation of the sliding process of Donghekou landslide triggered by the Wenchuan earthquake using a distinct element method |
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Authors: | Xinpo Li Siming He Yu Luo Yong Wu |
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Institution: | (1) Key laboratory of Mountain Hazards and Surface Process, CAS, Chengdu, 610041, China;(2) Institute of Mountain Hazards and Environment, CAS, No. 9, 4th Section, Renminnanlu, Chengdu, 610041, China |
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Abstract: | In the village of Donghekou (in Qingchuan County, Sichuan Province, China), a major landslide was triggered by the Wenchuan
earthquake in 2008 with more than 10 × 106 m3 of rock displaced. The kinematic behavior of this landslide is simulated using a 2D discrete element model. The numerical
model used in this work is composed of discs bonded together. The initial boundary conditions are applied along the ball–wall
contacts by using an initial velocity estimated from the strong motion data. The constraints are mainly issued from the final
geometry of the landslide including its capacity to dam the river. The modeling thus indicates that a low friction coefficient
(about 0.1) is required to account for the actual landslide characteristics. The runout behaviors are analyzed and some useful
conclusions are drawn. |
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Keywords: | |
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