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首页> 外文期刊>Open Journal of Geology >Examination of Rainfall-Induced Landslide Failure Mechanisms via a Centrifuge Physical Simulation Test
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Examination of Rainfall-Induced Landslide Failure Mechanisms via a Centrifuge Physical Simulation Test

机译：通过离心机物理模拟试验检验降雨引起的滑坡破坏机理

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摘要

Rainfall is one of the most important factors contributing to landslides, and gentle bedding incline, high-rainfall induced landslides are common throughout the world. Field observations and theoretical analyses have been used to assess slope instability caused by permeability variation. In this study, the influence of rainfall infiltration on gentle bedding incline slope behaviour was investigated using a centrifuge physical simulation test. The magnitude, pattern and development of pore water and earth pressure at the interface; the shear failure surface features; and the corresponding deformation and failure processes were considered. A model with interbedded sand and mud was created, and a centrifuge was used to simulate both natural and rainfall conditions. The weak intercalation was composed of single-material silty clay, and the landslide mass was composed of red-bed sandstone. A combination of photography, pore water pressure measurements and earth pressure measurements were used to examine the relationship between the pore water pressure, earth pressure and failure modes. When the slope experiences overall instability, the curves of the earth pressure and pore water pressure dramatically decrease. The results reveal that the failure shear surface largely depends on the differential creep caused by the properties of the rock mass and the rainfall infiltration.
机译：降雨是导致滑坡的最重要因素之一，在世界范围内，平缓的地层倾斜，高降雨诱发的滑坡很普遍。现场观察和理论分析已用于评估渗透率变化引起的边坡不稳定性。在这项研究中，使用离心机物理模拟试验研究了降雨入渗对平缓顺层倾斜行为的影响。界面处孔隙水和土压力的大小，形式和发展;剪切破坏表面特征;并考虑了相应的变形和破坏过程。创建了一个沙土和泥沙互层的模型，并使用离心机模拟了自然和降雨条件。弱插层由单一材料粉质黏土组成，滑坡体由红层砂岩组成。通过摄影，孔隙水压力测量和土压力测量的组合来检查孔隙水压力，土压力和破坏模式之间的关系。当斜坡经历整体失稳时，土压力和孔隙水压力的曲线急剧下降。结果表明，破坏剪切面很大程度上取决于岩体性质和降雨入渗引起的微分蠕变。

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