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Numerical Simulation of Rock Slope Toppling Based on Rheological Model

机译：基于流变模型的岩质边坡倒塌数值模拟

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The slope of a hydropower station in the Yellow River has been dumping since the reservoir impounded in 2009. The cumulative deformation of the slope for five years is about 40m, which has posed a serious threat to the safety of the power plant. In this paper, the discontinuous deformation analysis program considering rheology deformation of structural surface is developed based on the Burgers model. With this program, the numerical simulation of the toppling deformation of slope is carried out. The deformation mechanism and failure mode of the slope are analyzed in this paper. It is shown that the impoundment of the reservoir is the induced factor of the slope deformation. The deformation of slope has a strong correlation with the change of water level, but the amount of deformation directly caused by water load is very small. The rising of water level caused the change of effective stress in the slope, which triggered the rheological deformation of the slope. Fully considering the rheological characteristics of structure plane in rock mass, the results of numerical calculation are basically consistent with the results of the actual monitoring.
机译：自2009年水库蓄水以来，黄河水电站的边坡一直处于倾倒状态。五年来该边坡的累积变形约为40m，对发电厂的安全构成了严重威胁。本文基于Burgers模型开发了考虑结构表面流变变形的不连续变形分析程序。利用该程序对边坡的倾倒变形进行了数值模拟。分析了边坡的变形机理和破坏模式。结果表明，水库蓄水是边坡变形的诱发因素。边坡的变形与水位的变化有很强的相关性，但是直接由水负荷引起的变形量很小。水位的升高引起边坡有效应力的变化，引发边坡的流变变形。充分考虑岩体中结构面的流变特性，数值计算结果与实际监测结果基本吻合。

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