Mechanical Characteristics of Debris Flow
Mechanical Characteristics of Debris Flow
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DOI：
10.1061/jyceaj.0005046
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发表时间：
1978-08
影响因子：
2.4
通讯作者：
Tamotsu Takahashi
中科院分区：
文献类型：
--
作者：
Tamotsu Takahashi
利用床面施加剪应力与抵抗应力的关系，探讨了泥石流堆积上由于陆流的出现而形成的钻孔状泥石流的发生机理。明确了非定常床流和部分定常床流的发生判据。利用Bagnold提出的扩张剂流体的概念，可以预测部分静止床面流动接近准稳态，其深度、速度和浓度都是可预测的。尽管非定常床流的前缘高度随距离增大，但平移速度和浓度几乎不变，通过适当的假设，流动特性可以从理论上预测。
A mechanism of occurrence of bore-like debris flow due to the appearance of overland flow on the debris accumulation is considered using the applying shear stress and resisting stress relationship in the bed. The criteria for the occurence of the nonstationary bed flow and the partly stationary bed flow are made clear. The partly stationary bed flow approaches a quasi-steady state, whose depth, velocity and concentration are predictive applying the concept of dilatant fluid introduced by Bagnold. Although the front height of the nonstationary bed flow increases versus distance, the translation velocity and concentration are nearly constant and flow characteristics are theoretically predictive by some appropriate assumptions.