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

作　　者：徐凌雁 李大成 韦臻 高梓航 王聚光 XU Lingyan;LI Dacheng;WEI Zhen;GAO Zihang;WANG Juguang(Track Station Yard and Terminal Design Department,China Railway Design Corporation,Tianjin 300308,China)

机构地区：[1]中国铁路设计集团有限公司线路站场枢纽设计研究院,天津300308

出　　处：《铁道标准设计》2025年第2期30-35,44,共7页Railway Standard Design

基　　金：中国国家铁路集团有限公司科技研究开发计划课题(N2022G066);中国铁路设计集团有限公司科技开发课题(2022BXZ004)。

摘　　要：高速铁路建设过程中,大跨度桥梁应用无砟轨道是最大的技术难题之一,因此针对大跨度桥梁无砟轨道开展研究十分必要。以主跨2×448 m大跨度斜拉桥为例,对大跨度桥上无砟轨道力学特性及平顺性进行研究,主要结论如下:(1)桥梁各变形工况下无砟轨道受力良好,铺设橡胶弹性缓冲垫层可有效协调层间变形,改善受力状态;(2)列车以设计速度350 km/h运行时,车辆、轨道、桥梁的动力响应各指标均能满足相关要求;(3)桥梁在温度及温度组合荷载作用下,主跨竖向变形最小曲率半径为359164 m>49000 m,满足行车舒适性要求;(4)轨道结构长波不平顺评价以7 mm/60 m作为设计速度350 km/h高速铁路的平顺性限值,并在200 m高通滤波后进行评价,主跨2×448 m斜拉桥60 m弦正矢值最大为3.209 mm<7 mm,满足平顺性要求。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 359164 m,which is larger than 49000 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 

分 类 号：U238[交通运输工程—道路与铁道工程] U213.9U24