摘要
应用MIKE 21二维水动力模型,对新扬高速淮河特大桥非正交跨河段的桥墩布置方案进行分析,从河道壅水、流态、流速变化等方面分析不同桥墩布置方案对淮河汊道行洪的影响。结果表明,分离新建的桥墩若与老桥对孔布置,壅水较大;桥墩若错孔布置,新老桥墩之间易形成绕流,流场对于桥墩的自身安全不利,影响桥梁安全;最终推荐新建桥墩与老桥对孔顺水流方向布置,并采用斜桥斜布方案进行桥梁扩建。本研究成果可为桥梁扩建方案比选提供依据,降低工程成本。
This study explores the pier layout for the non-orthogonal crossing section of the Xinyang Expressway’s Huaihe River Extra-Large Bridge.Utilizing the MIKE 21 hydrodynamic model,it assesses the effects of various pier layout plans on flood routing in the Huaihe River channel,considering factors such as river blockage,flow patterns,and variations in flow velocity.The findings reveal that aligning the newly constructed piers opposite the existing ones leads to substantial water blockage.Moreover,when the piers are misaligned,a detour flow can easily form between the new and old structures,compromising their safety and undermining the bridge’s integrity.The preferred arrangement is to position the new piers in line with the flow direction opposite the old bridge,employing an angled bridge and angled layout for the expansion project.The findings of this study can serve as a basis for comparing and selecting bridge expansion plans and reduce engineering costs.
作者
何向阳
费晓磊
He Xiangyang;Fei Xiaolei(Huai’an Water Conservancy Survey and Design Institute Co.,Ltd.,Huai’an 223001,China)
出处
《吉林水利》
2025年第1期7-12,共6页
Jilin Water Resources
