邻近运营线超宽幅钢结构系杆拱桥施工技术  

Construction Technology of Super-wide Steel Structure Tied Arch Bridge Adjacent To Operating Line

作　　者：陈立斌 CHEN Libin(China Railway 15th Bureau Group 2nd Engineering Co.,Ltd.,Shanghai 201714,China)

机构地区：[1]中铁十五局集团第二工程有限公司,上海201714

出　　处：《施工技术（中英文）》2024年第21期58-63,102,共7页Construction Technology

基　　金：中铁十五局集团有限公司科技项目:大跨度下承式平行三拱肋钢箱拱桥施工关键技术研究(2020B1)。

摘　　要：金汇港大桥北侧邻近既有运营铁路线,南侧埋有天然气管道,且上跨通航金汇港航道,建造环境复杂,施工风险控制难度高。结合施工环境及桥梁结构特点,将传统整幅“先梁后拱”施工流程优化为分幅“先梁后拱”,通过合理布置水下支架墩及拱下支架、引入钢构件虚拟拼装技术、基于重心计算进行吊点优化、采用预制构件快速拼装技术等,实现金汇港大桥主桥钢结构、混凝土桥面板快速安装施工,提升桥梁拼装效率及建造品质。工程实践表明,金汇港大桥构件预制及拼装可满足桥梁结构设计要求,且施工期间可保证邻近运营线安全。The north side of the Jinhuigang Bridge is adjacent to the existing operating railway line,and the south side is buried with natural gas pipelines,and it crosses the navigable Jinhuigang Channel,the construction environment is complex and the construction risk control is difficult.Combined with the construction environment and the characteristics of the bridge structure,the traditional construction process of the whole beam first and arch later is optimized into separated beam first and arch later.By reasonably arranging the underwater support piers and the arch supports,introducing the virtual assembly technology of steel members,optimizing the lifting point based on the calculation of the center of gravity,and adopting the rapid assembly technology of prefabricated components,the rapid installation and construction of the steel structure and concrete bridge deck of the main bridge of Jinhuigang Bridge is realized,and the assembly efficiency and construction quality of the bridge are improved.The engineering practice shows that the prefabricated and assembled components of Jinhuigang Bridge can meet the requirements of bridge structure design,and the safety of adjacent operating railway line can be guaranteed during construction.

关 键 词：桥梁 拱桥 系杆 钢结构 拼装 施工技术 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]