某多跨双曲拱桥改造设计关键技术  

The Key Technology of Reconstruction Design for a Hyperbolic Arch Bridge

作　　者：韩宜康[1] Han Yi-kang(Nanjing Institute of Railway Technology,Nanjing 210031,Jiangsu,China)

机构地区：[1]南京铁道职业技术学院,江苏南京210031

出　　处：《广东交通职业技术学院学报》2023年第2期31-35,共5页Journal of Guangdong Communication Polytechnic

基　　金：2019年南京铁道职业技术学院“青蓝工程”培养项目。

摘　　要：以某双曲拱桥加固改造工程为例,在主拱圈状态良好的状况下以减重、提高耐久性为设计原则,采用连续板式拱上建筑改造方案。在对空腹式双曲拱桥改造进行研究的基础上,提出钢底模现浇混凝土整体连续板、现浇悬臂挑梁的改造方案;对行车道板支撑形式及对横隔墙受力的影响进行分析研究;在保证桥面能够不中断交通的情况下,提出对称、均衡、分期改造的方案。改造后该双曲拱桥承载能力提升、耐久性提高,取得了良好的改造效果。Taking the reinforcement and reconstruction of a hyperbolic arch bridge project as an example,when the main arch ring is in good condition,considering the design principle of weight reduction and durability improvement,the reconstruction scheme of building on the continuous slab arch was adopted.Based on the research on the reconstruction of open spandrel hyperbolic arch bridge,the reconstruction schemes of cast-in-place concrete integral continuous slab with steel Bottom die and cast-in-place cantilever beam were proposed.The support form of carriageway slab and its influence on the stress of transverse partition wall were studied;a symmetrical,balanced and phased reconstruction scheme was proposed under open traffic.After the reconstruction,the bearing capacity and durability of the hyperbolic arch bridge have been improved,and good reconstruction effect has been achieved.

关 键 词：双曲拱桥 改造设计 连续板式拱上建筑 对称均衡 

分 类 号：U448.221[建筑科学—桥梁与隧道工程]