摘要
冰塞的出现使上游水位壅高,极易诱发凌洪灾害。桥墩墩型是影响桥墩附近冰塞壅水的重要因素之一。通过模型试验,对不同墩型影响下的平衡冰塞水位增值过程进行研究,并与无桥墩条件和明流情况进行了对比。试验结果表明:在试验冰水流量比条件下,当Fr≤0.145时,无桥墩条件下平衡冰塞水位增值小于有桥墩;当Fr>0.145时,无桥墩条件下平衡冰塞水位增值大于有桥墩;桥墩墩型引起的平衡冰塞水位增值由大到小排序为长方形桥墩、尖端形桥墩、圆端形桥墩和圆柱形桥墩。易发生冰塞的河段,建造桥梁时应当尽量选用圆柱形、圆端形桥墩。
The presence of ice jam increases the possibility of upstream water level,which can easily trigger ice jam flooding. Bridge pier types can significantly influence backwater heights. By using a series of experiments in the laboratory,the impact of bridge-pier types were investigated. It shows that,when Fr≤0. 145,the backwater height from ice jam without pier is smaller than that with piers. When Fr〉0. 145,the backwater height from ice jam without pier is larger than that with piers. The sequence of backwater height due to ice jam is the tip-shaped pier,rectangular pier,Round end-shaped pier,cylindrical pier from large to small. For rivers that have ice jam problems,it is better to choose cylindrical pier or round end-shaped pier.
作者
王军
黄宁静
吴一帆
程铁杰
WANG Jun;HUANG Ningjing;WU Yifan;CHENG Tiejie(School of Civil Engineering,Hefei University of Technology,Hefei 230009,China)
出处
《水科学进展》
EI
CAS
CSCD
北大核心
2018年第4期568-573,共6页
Advances in Water Science
基金
国家自然科学基金资助项目(51379054)~~
关键词
桥墩墩型
平衡冰塞水位
弗劳德数
冰塞壅水
试验研究
bridge-piers type
balance ice jam stage
Froude number
ice jam backwater
experimental study
