Trapping Mechanism of Debris Flow by Steel Open Dams
Trapping Mechanism of Debris Flow by Steel Open Dams
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发表时间：
2014
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通讯作者：
N. Ishikawa;Joji Shima;T. Matsubara;H. Tatesawa;T. Horiguchi;T. Mizuyama
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文献类型：
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作者：
N. Ishikawa;Joji Shima;T. Matsubara;H. Tatesawa;T. Horiguchi;T. Mizuyama
泥石流前缘的岩石被日本北海道的一座钢制露天坝拦住，如图1所示。本文提出了实验和计算方法来检查钢制开放式水坝的截留机制。首先，进行了模型试验，以研究使用水槽截留泥石流中的砾石随时间变化的机制。其次，通过假设砾石由球形元素组成来开发 3-D DEM。最后，将三维DEM模拟得到的截留过程（河床高度-时间关系）和截留率与模型试验得到的结果进行了比较。
Rocks in the debris flow front were trapped by a steel open dam in Hokkaido, Japan as shown in Fig.1. This paper presents experimental and computational approaches to examine the trapping mechanism by a steel open dam. First, a model test was performed to examine the mechanism whereby gravel in the debris flow is trapped for the time history by using a flume. Second, a 3-D DEM was developed by assuming the gravel to be made up of spherical elements. Finally, the trapping process (riverbed height-time relation) and trapping ratio obtained by the 3-D DEM simulation were compared with those obtained by the model test.