成贵铁路鸭池河大桥拱肋结构形式比选设计  

Comparative Design of Arch Rib Structure of Yachihe Bridge of Chenggui Railway

作　　者：王乐冰[1] 苏杨[1] WANG Lebing;SU Yang(China Railway Major Bridge Reconnaissance&Design Institute Co.,Ltd.,Wuhan,Hubei430050,China)

机构地区：[1]中铁大桥勘测设计院集团有限公司,湖北武汉430050

出　　处：《施工技术（中英文）》2023年第10期104-109,共6页Construction Technology

基　　金：中国中铁股份有限公司科技项目(重大-9-2011)。

摘　　要：成贵铁路贵州鸭池河特大桥为跨度436m的中承式拱桥,施工条件复杂、运输困难。通过对不同拱肋截面形式进行比选,在拱肋结构上提出钢-混结合截面形式,从而避开钢管混凝土结构脱空难题,且钢箱可作为混凝土施工平台及模板,施工便捷。同时对拱肋的拱轴系数、内倾角、混合接头形式、横向联接系形式等进行比选设计,较好地满足了高铁桥梁高标准动力特性要求。The Guizhou Yachihe Bridge of Chenggui Railway is a 436m span medium⁃bearing arch bridge.In the process of arch rib design of the bridge,combined with the difficult transportation and construction conditions in mountainous areas,the form of arch rib structure of long⁃span arch bridge was studied,and the steel⁃mixed section form was proposed on the arch rib structure for the first time by comparing different arch rib section forms,so as to avoid the problem of emptying the steel pipe concrete structure,and the steel box can be used as a concrete construction platform and formwork,which is convenient for construction.At the same time,the arch shaft coefficient,camber angle,mixed joint form,lateral connection system form,etc.of the arch rib are selected to better meet the requirements of high⁃standard dynamic characteristics of high⁃speed rail bridges.

关 键 词：铁路 桥梁 拱桥 拱肋 钢管拱 结合拱 拱轴系数 

分 类 号：U445[建筑科学—桥梁与隧道工程]