弯曲河段推移质运动方式研究  

Study on patterns of bed load movement in curved reaches

作　　者：刘鹏飞[1] 李一兵[2] 胡旭跃[1] 

机构地区：[1]长沙理工大学水利工程学院,湖南长沙410004 [2]交通运输部天津水运工程科学研究所工程泥沙交通行业重点试验室,天津300456

出　　处：《交通科学与工程》2011年第1期69-73,共5页Journal of Transport Science and Engineering

摘　　要：在天然连续弯曲河段的概化模型上进行推移质输沙试验,分析不同弯道段推移质泥沙运动的特点,绘制了泥沙运动轨迹图.试验结果表明:在不同类型的连续弯道中,推移质泥沙运动轨迹不同,凹岸来沙和凸岸来沙向下游输移时呈现不同的特点.连续弯道的前、后两弯的形态和过渡段的河床形态影响泥沙运动路线,决定泥沙输移方式.Test of fixed bed sediment transportation of bed load is conducted using generalized model of consecutive curved reaches,and a trajectory map of bed load movement in curved reaches is drawn.The result shows that the trajectory of bed load sediment movement is different with different types of consecutive curves.There are different characteristics of motion when the bed load transported to the lower reaches for the sediment comes from concave and convex banks.It is considered that the movement route of bed load sediment in curved reaches is affected by the form of consecutive curves and the form of changeover portion,which is also decided by the pattern of migration.

关 键 词：弯曲河段 连续弯道 推移质 同岸输沙 异岸输沙 

分 类 号：TV142[水利工程—水力学及河流动力学]