摘要
为降低桥墩群对杭州之江新城骨干河道团结浦、三号浦交汇处的水流影响,构建了平原河网平面二维数学模型,研究了3个岸线优化方案对交汇处流态和雍水的改善效果,并综合阻水比、征地面积、水域面积及桥墩安全等多目标进行比较分析。结果表明,拓宽一侧河道以免桥墩位于主河槽或改道避开桥墩,均可有效降低桥墩雍水影响,3个优化方案对雍水高度的改善效果相当;方案2、3会影响桥墩安全,水域面积相对较小且征地面积大,方案1对桥墩安全影响较小,工程实施相对容易,综合优势较高,推荐方案1为最优方案。
In order to reduce the impact of bridge pier groups on the water flow at the intersection of the main rivers of Hangzhou Zhijiang New City,three shoreline optimization schemes were studied to improve the flow pattern based on a two-dimensional mathematical model.The optimal remediation plan was recommended based on multiple objectives such as water resistance ratio,land area,water area,bridge pier safety,and so on.The results show that the widening one side of the river channel to prevent bridge piers from being located in the main channel or changing the route to avoid bridge piers can effectively reduce the impact of bridge piers on the water level.The three optimization schemes have the same improvement effect on the backwater of the bridge piers.Scheme 2 and scheme 3 will affect the safety of bridge piers,with relatively small water area and large land acquisition area.Scheme 1 has little impact on the safety of bridge piers and is relatively easy to implement.Scheme 1 has high comprehensive advantages,and is recommended as the optimal option.
作者
张连刚
李若华
谢宇
ZHANG Lian-gang;LI Ruo-hua;XIE Yu(Zhejiang Qingyuan Engineering Technology Co.,Ltd.,Hangzhou 310012,China;Zhejiang Tongji Vocational College of Science and Technology,Hangzhou 311231,China)
出处
《水电能源科学》
北大核心
2023年第11期31-34,共4页
Water Resources and Power
关键词
河道交汇
桥墩
流态
雍水
防洪排涝
平原河网
confluence of river courses
pier
flow pattern
backwater
flood control&drainage
plain river network
作者简介
张连刚(1979-),男,高级工程师,研究方向为水资源调配、水动力模型等,E-mail:3765980@qq.com;通讯作者:李若华(1977-),男,博士、正高级工程师,研究方向为水力学及河流动力学,E-mail:liruohua2000@163.com。
