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Influence of the Rainfall Parameters on the Stability of Landslide Dams

机译：Influence of the Rainfall parameters on the stability of Landslide Dams

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摘要

This study investigates transient seepage using a two-phase flow scheme in finite difference code, FLAC. The saturation of pore water pressure distribution and the stability of the assumed landslide dams are calculated. The safety factors of the assumed landslide dams are evaluated using the strength reduction technique. The results show that when we increase the saturated permeability of the dam materials, dam failure occurs earlier than those dams with smaller saturated permeability. When the slope angles of the dams are small, the timing of failure is slower than those dams with large slope angles. However, the durations of the failure process of dams with smaller slope angle are shorter than those of dams with larger slope angles. When the peak intensity of rainfall is higher, dams are less stable.
机译：本研究使用有限差分码FLAC中的两相流方案研究瞬态渗流。计算了孔隙水压力分布的饱和度和假定滑坡坝的稳定性。使用强度折减技术评估假定滑坡坝的安全系数。结果表明，当我们增加大坝材料的饱和渗透率时，大坝破坏发生的时间要早​​于那些具有较小饱和渗透率的大坝。当大坝的倾角较小时，破坏的时机要比那些大倾角的坝慢。然而，具有较小倾角的大坝的破坏过程的持续时间比具有较大倾角的大坝的破坏过程的持续时间短。当降雨的峰值强度较高时，水坝的稳定性就会降低。

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