东新赣江特大桥主桥设计研究  

Research on the Design of the Main Bridge of Dongxin Ganjiang Bridge

作　　者：艾宗良[1] 马庭林[1] 戴胜勇[1] 

机构地区：[1]中铁二院工程集团有限责任公司,成都610031

出　　处：《铁道工程学报》2016年第4期60-64,共5页Journal of Railway Engineering Society

基　　金：铁道部科技开发计划重大课题(2009G004-B)

摘　　要：研究目的:东新赣江特大桥是向莆铁路和杭(州)南(昌)长(沙)高铁引入南昌西客站的控制性工程。该桥具备多线、宽桁、重载、大跨、高速等特征,为确保大桥设计方案合理可行,本文对桥梁的桁式、桁片、横联、防水保护层以及构造细节等进行研究。研究结论:(1)采用上弦二次抛物线曲线变桁高的桁式立面,满足了桥位、受力、景观的需要;(2)跨度200 m的四线铁路钢桁梁桥,宜优先选择四线双桁方案;(3)带K撑和吊杆的横向传力横联并匹配纵横梁正交异性板钢桥面系,可有效解决横向跨度过大的问题;(4)铁路钢桥面防水保护层采用双层环氧沥青混凝土柔性复合结构体系可较好地满足相关要求;(5)在构造细节方面,设计的"亚"字形杆件断面能适应受力横联与主桁的连接需要;(6)该研究结论可在铁路多线钢桁梁桥设计中推广应用。Research purposes： The Dongxin Ganjiang Bridge is a key project of Xiangtang - Putian Railway and Hangzhou- Nanchang- Changsha High Speed Railway, which is connected to Nanchang West Railway Station. The bridge has the characteristics of multi line, wide truss, heavy load, large span, high speed, etc. In order to ensure that the bridge design scheme is reasonable and feasible, truss type, truss plate, sway bracing, waterproof protective layer, and structural details of the bridge were studied for the design. Research conclusions： （ 1 ） Truss type elevation, with two times parabola curve the upper chord and the variable height of truss, can meet the needs of the bridge site, structure force and bridge landscape. （2） To four line railway steel truss bridge at about 200 m span, it is preferred to choose double trusses. （3） The lateral force transmission sway bracing with K support and the suspender, combined the orthotropic steel deck with longitudinal and transverse beams, can effectively solve the problem of excessive lateral span. （4） New composite structure system of epoxy asphalt concrete was used on ballast trough board of railway steel bridge flexible waterproof layer which can meet relevant requirements. （5） At details, ＂亚＂ type of web member section was invented to adapt the connection between sway bracing and the main truss. （6） The research conclusions can be applied to the design of railway multi line steel truss girder bridges.

关 键 词：铁路 钢桁梁 四线双桁 环氧沥青混凝土 设计 

分 类 号：U443.3[建筑科学—桥梁与隧道工程]