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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.

陡陡明渠动床上的泥沙输运可分为四种主要类型及其两种中间类型，即推移质和悬移质类型、泥石流和泥石流类型以及推移质和泥石流类型之间的中间类型。Hirano和Hashimoto（1995，1997）提出的高含沙水流模型可适用于陡槽中各种类型的水流输沙。流动模型由颗粒层和惯性层组成，颗粒层中颗粒间应力起主要作用，惯性层中惯性力起主要作用。Hirano和Hashimoto（1996，1998）在水流模型的基础上推导了输沙量公式。本文还将泥沙流量公式与试验结果及其它公式进行了比较。Hirano和Hashimoto（1996，1998）的输沙公式计算结果与试验结果吻合较好。