铁道标准设计2025，Vol.69Issue(2)：30-35,44,7.DOI:10.13238/j.issn.1004-2954.202306020006
高速铁路大跨度斜拉桥无砟轨道静动力及平顺性研究
Research on Static,Dynamic and Smoothness of Slab Track for Long Span Cable-stayed Bridge on High-speed Railway
摘要
Abstract
During the construction of high-speed railway,the application of slab track for long-span bridges is one of the biggest technical challenges.Therefore,it is necessary to conduct research on the application feasibility of ballastless track on long-span bridges.Taking a long-span cable-stayed bridge with 2×448 m main span of a high speed railway as an example,this paper studies the mechanical characteristics and smoothness of ballastless track on long-span bridges.The main conclusions are as follows:(1)The ballastless track is well stressed under various deformation conditions of the bridge.Laying rubber elastic cushion can effectively coordinate the deformation between layers and improve the stress state.(2)When the train operates at the design speed of 350 km/h,the dynamic response indicators of the vehicle,track and bridge can all meet the relevant requirements.(3)Under temperature load,the minimum curvature radius of vertical deformation of the main span is 359 164 m,which is larger than 49 000 m,meeting the requirements for driving comfort.(4)The evaluation of long wave irregularity of the track is limited to 7 mm/60 m and evaluated after 200 m high pass filtering.The maximum chord vector value of 60 m for a cable-stayed bridge with a main span of 2×448 m is 3.209 mm,which meets the smoothness requirement.关键词
高速铁路/大跨度斜拉桥/轨道不平顺/无砟轨道/静动力学特性/中点弦测法Key words
high-speed railway/long span cable-stayed bridge/geometric irregularity/ballastless track/static and dynamic characteristics/midpoint chord measuring method分类
交通工程引用本文复制引用
徐凌雁,李大成,韦臻,高梓航,王聚光..高速铁路大跨度斜拉桥无砟轨道静动力及平顺性研究[J].铁道标准设计,2025,69(2):30-35,44,7.基金项目
中国国家铁路集团有限公司科技研究开发计划课题(N2022G066) （N2022G066）
中国铁路设计集团有限公司科技开发课题(2022BXZ004) （2022BXZ004）
