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A SEDIMENT DISCHARGE FORMULA FOR VARIOUS TYPES OF SEDIMENT TRANSPORT IN A STEEP OPEN CHANNEL

陡峭明渠各类输沙的排沙公式

基本信息

批准号：
13650570
负责人：
HASHIMOTO Haruyuki
金额：
$ 2.18万
依托单位：
Kyushu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2002
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650570/
关键词：
bed load sediment-water mixture flow debris flow suspended load hyperconcentrated flow mud flow two-layer model

项目摘要

Four main types of sediment transport and their two intermediate types can be distinguished on movable bed in a steep open channel ; those are bed and suspended load types, debris and mud flow types, and intermediate types between bed load and debris flow types. The flow model for hyperconcentrated sand-water mixtures proposed by Hirano and Hashimoto (1995, 1997) can be applied to all types of flows with sediment transport in a steep open channel. The flow model consists of granular and inertial layers ; the intergranular stresses play major role in the former layer and inertial forces in the latter layer. On the basis of the flow model, sediment discharge formulas have been derived by Hirano and Hashimoto (1996, 1998 ). In the present study the sediment discharge formulas are compared with the experimental results and also with the other formulas. The calculation of sediment discharge formulas derived by Hirano and Hashimoto (1996, 1998 ) shows good agreement with experimental results.

在陡峭明渠的活动床上可以区分出四种主要的泥沙运移类型及其两种中间类型；它们是底床和悬浮荷载类型、泥石流和泥石流类型以及底床荷载和泥石流类型之间的中间类型。 Hirano 和 Hashimoto (1995, 1997) 提出的超浓缩沙水混合物流动模型可以应用于陡峭明渠中所有类型的泥沙输运流动。流动模型由颗粒层和惯性层组成；晶间应力在前层中起主要作用，而惯性力在后层中起主要作用。 Hirano 和 Hashimoto (1996, 1998) 在流量模型的基础上推导了泥沙排放公式。在本研究中，泥沙排放公式与实验结果以及其他公式进行了比较。 Hirano和Hashimoto(1996，1998)推导出的泥沙排放公式计算结果与实验结果吻合较好。