基于原型沙的三峡库区细颗粒泥沙冲淤模型试验研究  

Physical model study on fine sediment transport in the Three Gorges Reservoir based on prototype sand

作　　者：李文杰[1] 杨胜发[1] 李斌强[2] 付旭辉[2] 

机构地区：[1]重庆交通大学国家内河航道整治工程技术研究中心,重庆400074 [2]重庆交通大学水利水运工程教育部重点实验室,重庆400074

出　　处：《泥沙研究》2016年第3期17-23,共7页Journal of Sediment Research

基　　金：国家科技支撑计划课题(2011BAB09B01);交通运输部应用基础研究项目(2014329814310)

摘　　要：三峡水库常年回水区淤积物多为中值粒径在0.01 mm左右的细颗粒泥沙,按传统理论对此类细沙模型试验进行设计存在困难。提出了一种基于原型沙的库区细颗粒泥沙模型试验方法,流速比尺的确定考虑水深影响,泥沙冲淤时间比尺与水流运动时间比尺一致,含沙量比尺取决于垂直比尺和干容重比尺。黄花城河段2003-2011年以及典型流量水位组合下的泥沙模型试验结果表明,淤积厚度和平面分布与原型符合较好,初步说明该方法适用于三峡库区细颗粒泥沙运动的模拟。The depositions in the Three Gorges Reservoir（ TGR） are mainly fine sediment with median diameters being about 0. 01 mm,and it is controversial when applying the traditional model design theory to simulate the sediment transport of this kind of fine sediment. A model design method based on prototype sand is proposed in this study. The velocity scale is determined considering the flow depth,the time scale of sediment transport is the same with that of water movement,the sediment concentration scale depends on the vertical scale and dry bulk density scale. The Huanghuacheng model experiments of sediment transport in 2003- 2011 and under typical combinations of water discharge and level are carried out. Results show that the thickness and distribution of the sedimentation agree well with the prototype,indicating that the proposed method is suitable for the simulation of the fine sediment transport in TGR.

关 键 词：三峡常年库区 细颗粒泥沙 原型沙 泥沙模型试验 黄花城河段 

分 类 号：TV149.2[水利工程—水力学及河流动力学]