Abstract This study provided a feasible approach for more accurate analysis of rock slope stability under rainfall infiltration. To quantitatively analyse the influence of rainfall on slope stability, we attributed the influence of rainfall on slope stability to the change in pore pressure and the decrease in rock strength due to the effects of water-induced weakening. The variation law of the mechanical behaviour of rock under the effects of water was studied by performing mechanical tests of rock specimens with different water contents. Based on this variation law, functions were established for the water-induced weakening of rock. Based on the theory of unsaturated seepage, functions for simulating the rock slope under the influence of rainfall were established. Two engineering cases were presented to demonstrate the application of the simulation method. The results proved that the proposed simulation method can accurately reflect the changes in the mechanical behaviour and stress-strain distributions of the rock mass in a rock slope under rainfall conditions.

中文翻译：

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考虑水致岩石弱化的降雨条件下岩石边坡稳定性分析

摘要 本研究为更准确地分析降雨入渗作用下的岩石边坡稳定性提供了一种可行的方法。为定量分析降雨对边坡稳定性的影响，我们将降雨对边坡稳定性的影响归因于水致弱化作用下孔隙压力的变化和岩石强度的降低。通过对不同含水量岩石试件进行力学试验，研究了水作用下岩石力学行为的变化规律。根据该变化规律，建立了岩石水致弱化的函数。基于非饱和渗流理论，建立了模拟降雨作用下岩石边坡的函数。两个工程案例展示了该仿真方法的应用。结果证明，所提出的模拟方法能够准确反映降雨条件下岩质边坡岩体的力学行为和应力应变分布的变化。