南玉高铁六景郁江特大桥主桥方案研究  

Research on Main Bridge Scheme of Liujing Yujiang Special Bridge of Nanning-Yulin High Speed Railway

作　　者：陈刚[1] CHEN Gang(China Railway First Survey and Design Institute Group Co.,Ltd.,Xi'an 710043,China)

机构地区：[1]中铁第一勘察设计院集团有限公司,西安710043

出　　处：《铁道标准设计》2023年第8期89-96,共8页Railway Standard Design

基　　金：中铁第一勘察设计院集团有限公司科技研究开发计划项目(院科19-12);中国铁建股份有限公司科研计划课题(2019-40)。

摘　　要：为满足通航要求,南玉高铁六景郁江特大桥采用主跨320 m桥梁结构,需深入研究主桥方案。通过对比分析方法,研究桥位和桥式方案;针对推荐方案,研究钢-混部分斜拉桥结构体系、桥梁约束体系、辅助墩的设置、边中跨跨度比、主梁梁高、钢-混结合段设置位置、桥塔对主梁刚度的影响等设计关键问题;按确定的相关参数进行结构设计,开展列车、轨道及桥梁动力仿真分析。研究表明:主桥采用(40.75+109+320+109+40.75) m钢-混部分斜拉桥结构,结构体系采用左塔设固定支座的半漂浮体系;边跨设置1个辅助墩,边中跨比采用0.47,支点梁高按14.5 m,跨中梁高按6.0 m,上塔桥面以上有效塔高按55 m设计;该结构具有优良的动力性能。To meet the navigational requirements,the Liujing Yujiang Super Major Special Bridge of Nanning-Yulin High Speed Railway requires 320 m main span bridge structure,and the main bridge design scheme needs to be studied in depth.Through comparative analysis method,the bridge position and bridge type scheme are studied.For the recommended scheme,key parameters of the bridge design are determined by studying the steel-concrete partial cable-stayed bridge structure system,bridge restraint system,setting of auxiliary piers,side span to main span ratio,height of main girders,location of steel-concrete combined section setting,influence of the bridge tower on the stiffness of main girders,and other key design issues.Structural design is carried out according to the determined relevant parameters.Dynamic simulation analysis of rain,track and bridge is conducted.Research shows that:the main bridge adopts(40.75+109+320+109+40.75)m of steel-mixed partial cable-stayed bridge structure;the structure system employs plane semi-floating system and left tower sets fixed support;one auxiliary pier is set in the side span;the side span to main span ratio is 0.47;the beam height of the fulcrum is 14.5 m,the beam height of the middle span beam is 6.0 m;effective tower height above the bridge deck is 55 m;and the dynamic performance of bridge is excellent.

关 键 词：高速铁路 铁路桥梁 钢-混部分斜拉 桥位 结构体系 约束体系 辅助墩 

分 类 号：U24[交通运输工程—道路与铁道工程] U448.27[建筑科学—桥梁与隧道工程] U442.5