Abstract This study focused on slope stability behaviors under different conditions, including gravity, rainfall, and earthquake. The slope models were prepared by mixing sand (80%) and clay (kaolinite, 20%) and compacting at optimum water content. Under the gravitational condition, the model tests were performed with three different directions of a gravel layer embedded into the slope. During the test, the artificial acceleration was gradually increased until slope failure occurred to observe the slope behaviors under rainfall and earthquake. The results indicated that the direction of the gravel layer affected the distribution of water content. Additionally, it was found that the inclination angle was a key factor influencing slope stability. Rainfall intensity played an important role in infiltration water. With regard to the failure wedge, among the three conditions examined, the earthquake condition generated the most significant effect on slope stability. Herein, for evaluating the stability of slopes, the Bishop's method incorporating an inclination angle of a gravel layer and apparent cohesion is introduced.

中文翻译：

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重力、降雨和地基震动引起的砂质边坡破坏行为的离心建模

摘要 本研究侧重于重力、降雨和地震等不同条件下的边坡稳定性行为。坡度模型是通过混合砂（80%）和粘土（高岭石，20%）并在最佳含水量下压实来制备的。在重力条件下，模型试验采用三个不同方向的砾石层嵌入边坡。试验过程中，逐渐增加人工加速度直至发生边坡破坏，观察边坡在降雨和地震作用下的行为。结果表明，砾石层的方向影响了含水量的分布。此外，发现倾斜角是影响边坡稳定性的关键因素。降雨强度对入渗水量起重要作用。关于失效楔，在所考察的三个条件中，地震条件对边坡稳定性的影响最为显着。在此，为评价边坡的稳定性，引入了结合砾石层倾角和表观黏聚力的Bishop法。