Two and Three Dimensional Slope Stability Analysis of Landslide Dam Failure due to Sliding
Two and Three Dimensional Slope Stability Analysis of Landslide Dam Failure due to Sliding
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发表时间：
2010-06
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通讯作者：
R. K. Regmi;H. Nakagawa;K. Kawaike;Y. Baba;Hao Zhang
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作者：
R. K. Regmi;H. Nakagawa;K. Kawaike;Y. Baba;Hao Zhang
非饱和多孔介质中的水流动是一个水-气两相流动问题。为了在土体渗流分析中考虑孔隙空气流动的影响，采用了基于多相流理论的水-气两相流模型。采用常规水相流模型和水-气两相流模型计算的孔压和含水率对滑坡坝进行了边坡稳定分析，以预测大坝的突然滑移破坏。在边坡稳定性分析中，采用了Janbu简化方法和基于极限平衡考虑的扩展Spencer方法。将两相渗流与扩展Spencer法相结合进行边坡稳定性分析，得到的整体模拟结果与试验观测结果较为吻合。
Synopsis Water flow in unsaturated porous media is water- air two-phase flow problem. To incorporate the effect of pore air flow in the soil seepage analysis a water-air two-phase flow model, based on the multi-phase flow theory is used. Slope stability analysis of land slide dam has been carried out using pore water pressure and moisture content calculated by only a conventional water-phase flow model as well as the water-air two-phase flow model so as to predict the failure of dam due to sudden sliding. Janbu’s simplified method as well as extended Spencer method based on limiting equilibrium considerations is used in slope stability analysis. Overall simulation results obtained by considering two-phase seepage flow combined with extended Spencer method of slope stability analysis are comparatively in good agreement with the experimentally observed results.