铁路无涂装耐候钢桥梁关键技术及应用示范  

Key Technology and Application Demonstration of Railway Uncoated Weather-resistant Steel Bridge

作　　者：戴胜勇[1] 陈克坚[1] 张志勇[1] 刘名君[1] DAI Shengyong;CHEN Kejian;ZHANG Zhiyong;LIU Mingjun(China Railway Eryuan Engineering Group Co.Ltd,Chengdu,Sichuan 610031,China)

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》2023年第6期57-61,共5页Journal of Railway Engineering Society

基　　金：中国铁路总公司科技研究开发重大课题(2017G006-B);中国中铁股份公司重点课题(2015-重点-07)。

摘　　要：研究目的:无涂装耐候钢桥梁已成为欧美和日本等发达国家钢桥的一种发展趋势,其应用较为广泛。而我国无涂装耐候钢桥梁起步较晚,缺乏成功应用的经验,更无可执行的设计和制造规范。本文依托拉林铁路藏木大桥开展铁路无涂装耐候钢桥梁建造关键技术研究,积累无涂装耐候钢桥梁在设计和制造中的经验,为铁路无涂装耐候钢桥梁技术规范的编制和在我国铁路桥梁上推广应用打下基础。研究结论:(1)根据钢材受力和耐久性要求,提出了无涂装耐候钢力学性能、焊接性能、耐候性能等要求,完成了耐候指数大于6.5的桥梁用无涂装耐候钢化学成分设计和试验;(2)基于易于形成和保护稳定锈层,提出了无涂装耐候钢桥梁结构构件和排水布置细节设计要求;(3)提出了针对耐候钢特点的制造要求;(4)本研究成果可为铁路无涂装耐候钢桥在我国的推广应用起到参考和示范作用。Research purposes:Uncoated weather-resistant steel bridge has become a development trend of steel bridge in developed countries such as Europe,America and Japan,and has been widely used.However,uncoated weather-resistant steel bridge in China started late,lack of successful application experience,and has no design and manufacturing specifications.Relying on the Zangmu Bridge of Lhasa-Linzhi Railway,this paper carried out research on the key technologies of the construction of railway uncoated weather-resistant steel bridge,and accumulated the experience in the design and manufacturing of uncoated weather-resistant steel bridge,laying a foundation for the preparation of technical specifications for uncoated weather-resistant steel bridge and the popularization and application of railway bridges in China.Research conclusions:(1)According to the stress and durability requirements of steel,the requirements of mechanical properties,welding properties and weather resistance of uncoated steel are put forward,and the chemical composition design and test of uncoated steel with weather resistance index greater than 6.5 are completed.(2)Based on the ease to form and protect the stable rust layer,the detailed design requirements of uncoated steel bridge structural components and drainage layout are put forward.(3)The manufacturing requirements for the characteristics of weathering steel are put forward.(4)The research results can play a reference and demonstration role for the popularization and application of railway uncoated weather-resistant steel bridge in China.

关 键 词：无涂装耐候钢桥梁 选材 设计 制造 

分 类 号：U24[交通运输工程—道路与铁道工程]