高速铁路主跨420 m钢箱拱桥设计方案研究  

Research on Design Scheme of Steel Box Arch with Main Span 420 m for High Speed Railway Bridge

作　　者：冯亚成[1] FENG Yacheng(China Railway First Survey and Design Institute Group Co.Ltd.,Xi’an Shaanxi 710043,China)

机构地区：[1]中铁第一勘察设计院集团有限公司

出　　处：《铁道建筑》2019年第11期7-11,共5页Railway Engineering

摘　　要：为满足西安至十堰高速铁路汉江特大桥420m中承式钢箱拱桥方案的设计要求,对影响大跨钢箱拱受力的矢跨比、拱轴系数、拱肋内倾角、横撑布置数量及位置等关键参数进行比选,提出了适合于本桥的设计参数。通过合理设置拱脚混凝土段长度,显著减小了钢箱拱桥的用钢量,提高了钢箱拱桥方案的竞争力。静动力计算分析表明,大跨钢箱拱桥可满足高速铁路运营需求。In order to meet the design requirements of the 420 m through type steel box arch of Hanjiang super largebridge of Xi’an-Shiyan high speed railway,the key parameters affecting the stress of the large span steel box arch werecompared and selected,including the ratio of rise to span,the coefficient of arch axis,the inclination angle of arch rib,the number and position of transverse braces,and the design parameters suitable for the bridge were put forward. Byreasonably setting the length of the concrete segment of the arch foot,the steel consumption of the steel box arch bridgeis significantly reduced,and the competitiveness of the scheme of the steel box arch bridge is improved. The static anddynamic analysis results show that the large span steel box arch bridge can meet the operation requirements of highspeed railway.

关 键 词：铁路桥梁 大跨钢箱拱桥 设计参数 计算分析 比选研究 

分 类 号：U448.223[建筑科学—桥梁与隧道工程]