Failure mechanisms of post-earthquake bedrock landslides in response to rainfall infiltration |
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| Authors: | Yong Wu Siming He Yu Luo Xinpo Li |
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| Institution: | WU Yong,HE Siming,LUO Yu,LI Xinpo Key laboratory of Mountain Hazards and Earth Surface Process,Chinese Academy of Sciences,Chengdu 610041,China Institute of Mountain Hazards and Environment,China |
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| Abstract: | Among the triggering factors of postearthquake bedrock landslides, rainfall plays an important role. However, with slope variation,
the mechanism of its effects on the failure of rock landslides is not clear. Here, from the viewpoint of fracture mechanics,
and based on post-earthquake conditions, the mechanisms of crack propagation, water infiltration and development of the sliding
surface were investigated. Then, according to the upper boundary theorem, the effects of water infiltrated into fractures
on the stability of rock slopes were analyzed quantitatively. Finally, an example is presented to verify the theory. The results
show that the propagation and coalescence of cracks and the lubrication of incipient sliding surfaces are the main causes
of the failure of post-earthquake rock landslides in response to rainfall. |
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| Keywords: | Post-earthquake Fracture infiltration Fracture mechanics Propagation and coalescence Upper boundary theorem Energy theory Rock landslide |
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