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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%。
In order to analyze the influence of rock mass damage and groundwater seepage on the stability of slope, based on the theory of limit equilibrium, the drag of rock slope under the condition of rock mass damage and groundwater seepage is deduced and the rock slope resistance Sliding stability coefficient expression; Through the relevant physico-mechanical tests on the slope of K117 + 900 ~ K118 + 020 on Huitong Expressway, the stability safety factor of rock slope under various conditions is calculated. The results show that the greater the degree of damage is, the poorer the stability of the slope is. The deeper the slope crevice water is, the worse the slope stability is. When calculating the stability coefficient of rock slope, The drag force can not be taken into account. With the increase of water depth or continuous rainstorm, the stability coefficient value is 9% lower than the value without considering the occurrence of piping phenomenon in cracks.