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裂隙损伤岩体在渗流作用下的边坡稳定性分析

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Keywords: 道路工程,岩石边坡,稳定性分析,极限平衡,裂隙损伤,渗流,安全系数

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Abstract:

？为了分析岩体损伤和地下水渗流对边坡稳定性影响,基于极限平衡理论,推导出了考虑岩体损伤和地下水渗流时岩壁拽拖力以及裂隙渗流中发生管涌情况下岩质边坡的抗滑稳定性系数表达式;通过在怀通高速公路K117+900~K118+020处边坡进行相关物理力学试验,计算了多种条件下岩石边坡的稳定性安全系数。结果表明:岩体损伤程度越大,边坡稳定性越差;坡顶部裂隙积水越深,越不利于边坡稳定;当计算岩质边坡稳定性系数时,裂隙渗流对裂隙壁的拽拖力可不予考虑;随着积水深度的增加或持续暴雨时,因裂隙中发生管涌现象,其稳定系数值比不考虑发生管涌时低9%。

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