铁路500 m跨度上承式拱桥桥式方案研究  

Study on Bridge Scheme of Railway 500 m Span Deck Arch Bridge

作　　者：杨欣然 李艳 季伟强 YANG Xinran;LI Yan;JI Weiqiang(China Railway Design Corporation Limited,Tianjin 300308,China)

机构地区：[1]中国铁路设计集团有限公司,天津300308

出　　处：《铁道建筑技术》2022年第7期27-32,41,共7页Railway Construction Technology

基　　金：中国铁路设计集团有限公司科技开发课题(2020YY340634)。

摘　　要：对铁路跨径500 m上承式拱桥进行了拱肋结构方案研究,提出并比选了钢桁拱桥、劲性骨架混凝土拱桥、钢管混凝土拱桥方案,综合比较推荐钢管混凝土拱桥;并以推荐方案为例,对500 m上承式钢管混凝土拱桥的拱轴线系数、拱肋倾角、拱上立柱构造等关键参数进行了研究比选,提出了合理的拱肋结构参数及立柱构造形式。考虑拱管内受拉区混凝土开裂退出工作,震后修复困难,建议大跨度拱桥研究采用合适的减隔震措施。研究结果可对铁路大跨度上承式拱桥设计提供参考。The arch rib structure scheme of railway deck arch bridge with a span of 500 m is studied.The schemes of steel truss arch bridge,rigid skeleton concrete arch bridge and concrete-filled steel tubular arch bridge are proposed and compared.Through comprehensive comparison,the concrete-filled steel tubular arch bridge is recommended.The key parameters of 500 m deck concrete-filled steel tubular arch bridge,such as arch axis coefficient,arch rib inclination and column structure on the arch,are studied and compared with the example of the recommended scheme.The reasonable structural parameters of arch rib and the structural form of column are put forward.Considering the concrete cracking and degradation in the tensile area in the arch pipe,it is very difficult to repair after the earthquake.It is suggested that appropriate vibration reduction and isolation measures should be taken for long-span arch bridges.It is hoped that the research results can provide reference for the design of railway long-span deck arch bridge.

关 键 词：铁路 大跨度拱桥 上承式拱桥 钢管混凝土拱桥 

分 类 号：U442.54[建筑科学—桥梁与隧道工程]