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基于改进水压分布的岩石边坡倾覆稳定性分析

, PP. 30-36

Keywords: 道路工程,岩石边坡,极限平衡法,倾覆稳定性分析,水压分布,影响因素

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Abstract:

基于改进地下水力分布假设,运用极限平衡方法,综合考虑锚固效应、冰雪冻胀作用和地震荷载的影响,推导出典型岩石边坡倾覆稳定系数计算式。算例分析表明采用改进后的水力分布假设进行岩石边坡倾覆稳定性分析更加合理;出流缝堵塞、地下水位升高、锚杆(索)锚固力和设置高度降低、冰雪冻胀作用加强、水平背向坡体和竖直向上的等效地震荷载对岩石边坡倾覆稳定性不利;锚杆(索)设置角度对边坡倾覆稳定性影响不大。同时,绘制了饱水岩石边坡倾覆稳定系数与几何要素之间的关系图,据此可迅速判定复杂条件下一定几何要素饱水边坡的倾覆稳定状态,便于工程实际运用。

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