桥梁建设对河道水流影响的数值模拟分析  

Numerical Simulation Analysis of the Influence of Bridge Construction on River Flow

作　　者：栾巍 LUAN Wei(Anhui Urban Construction Design Institute Co.Ltd.,Hefei 230051,China)

机构地区：[1]安徽省城建设计研究总院股份有限公司,合肥230051

出　　处：《水利科技与经济》2022年第10期63-67,共5页Water Conservancy Science and Technology and Economy

摘　　要：跨河桥梁的建设对桥墩处流速大小的变化、桥墩处水流流场的变化以及桥墩造成的上游雍水和对桥墩周边的冲刷产生一定的影响,使得河道安全运行存在风险。以安徽省安庆市稼先路桥2跨高河大河为例,运用MIKE软件对建桥前后水流流场进行模拟。结果表明,稼先路桥的修建对桥墩至岸坡堤防之间水流流场及流速的影响很小,桥前雍水达到0.62 cm,桥梁雍水至桥上游400 m;同时桥梁建设后,导致桥墩周围局部冲刷加重。研究成果可为后续消除和减轻影响措施提供一定的技术支持。The construction of river crossing bridge has a certain impact on the change of flow velocity at the pier,the change of flow field at the pier,the upstream backwater caused by the pier and the scouring around the pier,which makes the safe operation of the river at risk.Taking Jiaxian road bridge in Anqing city,Anhui province as an example,this paper uses MIKE software to simulate the flow field before and after the construction of the bridge.The results show that the construction of Jiaxian road bridge has little impact on the flow field and velocity between the pier and the bank slope embankment.The backwater in front of the bridge reaches 0.62 cm,and the backwater of the bridge reaches 400 m upstream of the bridge.At the same time,the local scouring around the pier is aggravated after the construction of the bridge.It can provide some technical support for subsequent measures to eliminate and mitigate the impact.

关 键 词：数值模拟 流场 稼先路桥 高河大河 

分 类 号：TV143[水利工程—水力学及河流动力学]