杭州湾铁路大桥钢轨伸缩调节器设置纵坡研究  

Study on Longitudinal Slope of Rail Expansion Joints Laying for Hangzhou Bay Cross Sea Railway Bridge

作　　者：张建 李大成 张志超 ZHANG Jian;LI Dacheng;ZHANG Zhichao(China Railway Design Corporation,Tianjin 300308,China)

机构地区：[1]中国铁路设计集团有限公司,天津300308

出　　处：《铁道工程学报》2024年第8期57-60,66,共5页Journal of Railway Engineering Society

基　　金：中国国家铁路集团有限公司科技研究开发计划重大课题(K2020G030);中国铁路设计集团有限公司科技开发重点课题(2022A02238002,2024A0223801)。

摘　　要：研究目的:高速铁路采用大跨度斜拉桥和长联连续梁的工况越来越多,钢轨伸缩调节器对确保行车安全发挥了重要作用。钢轨伸缩调节器对线路纵坡比较敏感,为保证线路安全、提高动车组列车平稳性并降低工程投资,本文对南通至宁波高速铁路杭州湾跨海大桥钢轨伸缩调节器设置坡度进行研究,为项目技术决策提供支撑。研究结论:(1)静动力学分析表明,线路纵坡对钢轨伸缩调节器的尖轨纵向位移影响较小,12‰坡道条件下轨道、桥梁各项动力指标均满足规范限值,设置钢轨伸缩调节器可行;(2)建议设置实时在线监测系统,为科学维护钢轨伸缩调节器提供依据;(3)本研究结果对优化铁路大跨桥梁伸缩调节器设置方案、降低工程投资具有积极意义。Research purposes:The use of large-span cable-stayed bridges and long continuous beams in high-speed railways is becoming increasingly common,and the steel rail expansion and contraction adjuster plays an important role in ensuring train safety.The steel rail expansion adjuster is sensitive to the longitudinal slope of the railway line.In order to ensure the safety of the line,improve the stability of high-speed trains,and reduce engineering investment,this paper studies the slope setting of the steel rail expansion adjuster for the Hangzhou Bay Cross Sea Bridge of the Nantong Ningbo high-speed railway,providing support for project technical decision-making.Research conclusions:(1)Static and dynamic analysis shows that the longitudinal slope of the track has a relatively small impact on the longitudinal displacement of the pointed rail of the rail expansion adjuster.Under the condition of a 12‰slope,all dynamic indicators of the track and bridge meet the regulatory limits,and setting up a rail expansion adjuster is feasible.(2)Setting up a real-time online monitoring system to provide a basis for scientific maintenance of rail expansion and contraction regulators is suggested.(3)The research results have positive significance for optimizing the setting scheme of expansion regulators for railway large-span bridges and reducing engineering investment.

关 键 词：跨海大桥 钢轨伸缩调节器 线路纵坡 静力分析 动力分析 

分 类 号：U212[交通运输工程—道路与铁道工程]