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| Experiment on sudden departure triggered by shearing vibration for locked segment of Wangjiayan landslide |
| ZHAO Xiaoyan1，HU Kai1，LIANG Yao2，YUE Zongyu3 |
| (1. Faculty of Geosciences and Environmental Engineering，Southwest Jiaotong University，Chengdu，Sichuan 610031，China；2. Sichuan Communication Surveying and Design Institute，Chengdu，Sichuan 610041，China；3. State Key Laboratory of Remote Sensing Science，Institute of Remote Sensing and Digital Earth，Chinese Academy of Sciences，Beijing 100101，China) |
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Abstract The study of sudden departure mechanism has always been a hot issue and difficulty in the research of high-speed landslide. This paper studies the sudden departure mode of Wangjiayan landslide and the starting acceleration through the experiments of vibration triggered by the shearing rupture of rock mass. The percentage of locked segment area to the total area of the potential sliding surface is defined as the locked segment area ratio. The experiments of vibration triggered by shearing rupture with different locked segment area ratios were carried out to analyze the relations between the vibration acceleration and the area ratio of locked segment. The results of experiments show that the vibration acceleration triggered by shearing rupture increases with the increase of the area ratio of the locked segment. Instead of sliding along the potential sliding surface, Wangjiayan landslide was considered to be ejected from the slope and traveled under gravity. At last，the starting acceleration and direction of Wangjiayan landslide are proposed.
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2018, Vol. 37 
