安九铁路跨九江城市快速路大桥设计  

Design of Anqing-Jiujiang High-Speed Railway Bridge Crossing Jiujiang Urban Expressway

作　　者：沈耀海 SHEN Yaohai(China Railway Fifth Survey and Design Institute Group Co.Ltd.,Beijing 102600,China)

机构地区：[1]中铁第五勘察设计院集团有限公司,北京102600

出　　处：《铁道建筑技术》2022年第8期55-60,共6页Railway Construction Technology

基　　金：中国铁路上海局集团有限公司科研项目计划(2020140)。

摘　　要：安九铁路九江动车走行线、改衢九线跨九江城市快速路因受既有铁路、城市快速路、自来水管道等条件制约,本文基于可行性、经济性、施工条件及维修养护等方面对比分析预制简支T梁、现浇简支箱梁、悬臂灌注连续梁及48 m简支钢-混组合桁架梁等四种常见桥式方案,最终确定采用等截面低高度悬臂灌注连续梁跨越九江城市快速路,并创新提出将两联并置连续梁中墩合并为1个跨度16.5 m的钢筋混凝土门式墩以避让自来水管道方案。对九江城市快速路采取临时交通导行等措施,顺利完成连续梁上跨城市快速路施工,可为以后类似工程勘察设计及施工提供新思路。Jiujiang EMU running track of Anqing-Jiujiang High-speed Railway and reconstructing Quzhou-Jiujiang Railway crossing Jiujiang urban expressway are restricted by the existing railway, urban expressway, water pipeline. In this paper, four common bridge schemes such as precast simply supported T-beam, cast-in-place simply supported box girder, cantilever cast-in-place continuous beam and 48 m simply supported steel-concrete composite truss beam are compared and analyzed from the aspects of feasibility, economy, construction conditions and maintenance. Finally, the constant section-low height cantilever pouring continuous beam is adopted. The scheme that two parallel continuous beam middle piers on a reinforced concrete portal pier with a span of 16.5 m is first used to avoid the water pipeline. By taking temporary traffic guidance measures for Jiujiang urban expressway, the construction of continuous beam over urban expressway is successfully completed, which can provide new ideas for the investigation, design and construction of similar projects in the future.

关 键 词：跨城市快速路 桥式方案比选 低高度连续梁 混凝土门式墩 设计 

分 类 号：U442.54[建筑科学—桥梁与隧道工程]