桥墩影响下弯槽冰塞形成临界条件和冰厚变化的试验研究

发布时间：2018-04-18 13:52

本文选题：桥墩 + 冰塞　；参考：《水利学报》2017年05期

【摘要】：天然河道中,桥墩的存在改变了局部水流特性,对冰塞形成及演变产生影响。通过模型试验,研究了桥墩存在及桥墩位置不同时对冰塞演变过程的影响,试验结果表明:桥墩的存在改变了桥墩附近的水流结构,使得桥墩附近水流输冰能力相对增大,冰塞厚度减小;相比于将桥墩安置在两弯连接直道段,将桥墩安置于弯道顶点处时,桥墩附近水流输冰能力增大;在两弯连接的直道段和弯道顶点处同时放置桥墩时,弯道平衡冰塞厚度介于单墩放置于两弯连接的直道段与单墩放置于弯道顶点处时的弯道平衡冰塞厚度之间。
[Abstract]:In natural river, the existence of piers changes the local flow characteristics and influences the formation and evolution of ice jams.The influence of the existence of piers and the location of piers on the evolution of ice slugs is studied through model tests. The experimental results show that the existence of piers changes the flow structure near the piers and makes the ice transport capacity near the piers relatively larger.The thickness of ice plug decreases; compared with placing the piers in the straight section of the two bends, the capacity of ice transportation near the pier increases when the piers are placed at the top of the bend, and when the piers are placed at both the straight section of the bridge and the top of the bend at the same time,The thickness of the equilibrium ice plug is between the thickness of the single pier placed in the straight section of the connection between the two bends and the thickness of the equilibrium ice plug of the bend when the single pier is placed at the top of the bend.
【作者单位】：合肥工业大学土木与水利工程学院;
【基金】：国家自然科学基金资助项目(51379054)
【分类号】：U446.1

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