王家岩滑坡锁固段剪切震动触发启程剧动试验

doi:10.13722/j.cnki.jrme.2017.0438

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摘要启程剧动机制一直是高速滑坡研究的热点和难点。以锁固段剪切破裂触发的震动为切入点，通过岩体剪切破裂震动试验，研究王家岩滑坡启程剧动模式及启动加速度。将锁固段面积占潜在滑面总面积的百分比定义为锁固段面积率，进行不同锁固段面积率的板岩岩体剪切破裂震动试验，分析震动加速度与锁固段面积率之间的关系，在此基础上研究锁固段剪切破裂震动对滑坡启动的影响，提出王家岩滑坡启程剧动机制。试验结果表明，剪切破裂震动加速度随锁固段面积率的增加而增大；王家岩滑坡启动为斜向上的抛射，而非沿潜在滑面的滑动，并提出王家岩滑坡的抛射启动加速度及抛射方向。

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	赵晓彦1
	胡凯1
	梁瑶2
	岳宗玉3

关键词 ：工程地质, 王家岩滑坡, 锁固段, 剪切震动试验, 启程剧动

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.

Key words： engineering geology Wangjiayan landslide locked segment shearing vibration experiment sudden departure

引用本文:

赵晓彦1，胡凯1，梁瑶2，岳宗玉3. 王家岩滑坡锁固段剪切震动触发启程剧动试验[J]. 岩石力学与工程学报, 2018, 37(1): 104-111.
ZHAO Xiaoyan1，HU Kai1，LIANG Yao2，YUE Zongyu3. Experiment on sudden departure triggered by shearing vibration for locked segment of Wangjiayan landslide. , 2018, 37(1): 104-111.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2017.0438 或 http://www.rockmech.org/CN/Y2018/V37/I1/104

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