当前位置: X-MOL 学术Landslides › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Assessment of barrier location effect on debris flow based on smoothed particle hydrodynamics (SPH) simulation on 3D terrains
Landslides ( IF 6.7 ) Pub Date : 2020-07-25 , DOI: 10.1007/s10346-020-01477-5
Shin-Kyu Choi , Joon-Young Park , Deuk-Hwan Lee , Seung-Rae Lee , Yun-Tae Kim , Tae-Hyuk Kwon

Debris flows are one of the perilous landslide-related hazards due to their fast flow velocity, large impact force, and long runout, in association with poor predictability. Debris-flow barriers that can minimize the energy of debris flows have been widely constructed to mitigate potential damages. However, the interactions between debris flows and barriers remain poorly understood, which hampers the optimal barrier installation against debris flows. Therefore, this study examined the effect of barrier locations, in particular source-to-barrier distance, on velocity and volume of debris flows via the numerical approach based on smoothed particle hydrodynamics (SPH). A debris-flow event was simulated on a 3D terrain, in which a closed-type barrier was numerically created at predetermined locations along a debris-flow channel, varying the source-to-barrier distance from the initiation point. In all cases, the closed-type barrier significantly reduced the velocity and volume of the debris flows, compared to the cases without a barrier. When the initial volume of source debris was small, or when the flow path was short, the barriers effectively blocked the debris flow regardless of the source-to-barrier distance. However, with a long flow path, installation of the barrier closer to the initiation location appeared more effective by preventing the debris volume from growing by entrainment. Our results contribute to a better understanding of how source-to-barrier distance influences debris-flow behavior, and show that the methodology presented herein can be further used to determine optimum and efficient designs for debris-flow barriers.

中文翻译:

基于 3D 地形平滑粒子流体动力学 (SPH) 模拟评估障碍物位置对泥石流的影响

泥石流是与滑坡相关的危险灾害之一,因为它们流速快、冲击力大、跳动时间长,而且可预测性差。可以最大限度地减少泥石流能量的泥石流屏障已被广泛建造,以减轻潜在的损害。然而,泥石流和障碍物之间的相互作用仍然知之甚少,这阻碍了防止泥石流的最佳障碍物的安装。因此,本研究通过基于平滑粒子流体动力学 (SPH) 的数值方法研究了障碍位置,特别是源到障碍距离对泥石流速度和体积的影响。在 3D 地形上模拟泥石流事件,其中在沿泥石流通道的预定位置以数值方式创建封闭式屏障,改变从起始点到源到屏障的距离。在所有情况下,与没有屏障的情况相比,封闭式屏障显着降低了泥石流的速度和体积。当源碎屑初始体积较小或流动路径较短时,无论源到屏障的距离如何,障碍物都有效地阻挡了泥石流。然而,对于较长的流动路径,通过防止碎片体积因夹带而增加,更靠近起始位置安装屏障似乎更有效。我们的结果有助于更好地理解源到屏障距离如何影响泥石流行为,并表明本文提出的方法可以进一步用于确定泥石流屏障的最佳和有效设计。
更新日期:2020-07-25
down
wechat
bug