基于流场分析的梯形断面河道多形态桥墩夹角优化数值模拟研究  

Optimization Simulation of Angle between Multi Shape Piers in Trapezoidal Channel Based on Flow Field Analysis

作　　者：柴文伟 黄赛花 谢华伟 何军[2] CHAI Wen-wei;HUANG Sai-hua;XIE Hua-wei;HE Jun(College of Hydraulic and Environmental Engineering,Zhejiang University of Water Resources and Electric Power,Hangzhou 310018,China;College of Hydraulic and Environmental Engineering,Three Gorges University,Yichang 443002,China;Key Laboratory for Technology in Rural Water Management of Zhejiang Province,Hangzhou 310018,China)

机构地区：[1]浙江水利水电学院水利与环境工程学院,浙江杭州310018 [2]三峡大学水利与环境学院,湖北宜昌443002 [3]浙江省农村水利水电资源配置与调控关键技术重点实验室,浙江杭州310018

出　　处：《浙江水利水电学院学报》2021年第2期33-37,54,共6页Journal of Zhejiang University of Water Resources and Electric Power

基　　金：浙江省重大科技专项项目(2015C03015)。

摘　　要：以河道常见梯形断面为例,数值模拟了不同形状的桥墩所对应的桥前壅水高度,研究发现在相同的流量水位条件下,圆墩和圆端形桥墩与水流夹角的优势夹角不同,当桥墩轴线与水流夹角小于30°时圆端形桥墩引起的水位壅高较小,当桥墩轴线与水流夹角大于40°时圆形桥墩引起的水位壅高较小,可以根据实际工程需要合理选择桥墩形状来降低壅水高度。On the basis of the trapezoid section of river,the backwater height in front of the bridge is simulated under the condition of different piers with different shapes.It is found that under the same flow level,the dominant angle between the circular pier and the flow is different from that between the circular end pier and the flow.When the angle between the axis of the pier and the flow is less than 30°,the backwater height caused by the circular end pier is smaller,and the angle between the axis of the pier and the flow is larger than 40°,the backwater height caused by round piers is small,so the shape of piers can be reasonably selected to reduce the backwater height according to the actual engineering needs.

关 键 词：数值模拟 桥墩形状 壅水高度 夹角优化 

分 类 号：U443.22[建筑科学—桥梁与隧道工程]