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围岩剪胀特性对隧道式锚碇极限承载力的影响

Guobang XIA, Shuihua ZHANG,Qin DENG

Soil Engineering and Foundation（2015）

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Abstract
采用有限元超载法计算隧道式锚碇的极限承载力,分析了围岩剪胀特性对计算结果的影响.结果表明,锚碇可调动的围岩范围随围岩剪胀角增大而增大,锚碇承载力随围岩剪胀角的增大而增大.不同的剪胀角取值,得到的极限承载力相差可达一倍,围岩破坏范围也相差一倍.因此,计算隧道式锚碇承载力时,需要合理考虑围岩剪胀特性的影响.
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