中国铁道科学2025，Vol.46Issue(5)：126-137,12.DOI:10.3969/j.issn.1001-4632.2025.05.11
千米级跨度高速铁路悬索桥运营期梁轨变形特征研究
Study on Deformation Characteristics of the Beam-Track of Kilometer-Span High-Speed Railway Suspension Bridge during Operation Period
摘要
Abstract
To grasp the deformation characteristics of the beam-track of the kilometer-span suspension bridge of high speed railway,based on theoretical derivation and statistical analysis of measured data,the influence of bridge-track alignment by bridge construction deviations,train loads,temperature,and wind were analyzed,and the static and dynamic track geometric irregularity on the bridge under different temperature were analyzed.The results show that the construction deviations of bridge and track are easy to produce the relatively large bridge elevation deviations,resulting in a large 60-meter chord measurement value in areas such as the bridge towers and auxiliary spans,etc.The vertical deformation of the bridge caused by train live load is relatively large,but the alignment of the bridge in the main span area is generally smooth as a whole.Equally important,the bridge temperature and the rail temperature are positively correlated with the air temperature,and the rail temperature follows the air temperature more closely.Compared with rail temperature,bridge temperature obviously lags behind air temperature.As well as,the elevations of bridge and track and the beam joint spacing are linearly related to the temperature.Among them,the change rate of the track elevation and the beam joint spacing with temperature are-34.6 mm·℃-1 and-11.1 mm·℃-1 respectively.The maximum difference of the track slope between winter and summer is 2.802‰.Besides,both the static and dynamic track geometric irregularity do not exceed the Class Ⅱ planned maintenance level.The relatively large values occur in areas such as the bridge towers,beam ends and other areas.Moreover,the ballasted track spectrum of the kilometer-span high-speed railway bridges can be characterized by the ballasted track spectrum of China's high-speed railway.关键词
高速铁路/千米级跨度悬索桥/梁轨变形特征/动、静态不平顺/数据分析Key words
High-speed railway/Kilometer-span suspension bridge/Deformation characteristics of bridge-track/Static and dynamic irregularity/Data analysis分类
交通工程引用本文复制引用
李国龙,陈东生,庞志强,高芒芒,冯仲伟,孙宪夫,郭辉..千米级跨度高速铁路悬索桥运营期梁轨变形特征研究[J].中国铁道科学,2025,46(5):126-137,12.基金项目
国家重点研发计划项目(2022YFB2602900) （2022YFB2602900）
中国国家铁路集团有限公司科技研究开发计划课题(N2023G083) （N2023G083）
中国铁道科学研究院集团有限公司科技研究开发课题(2023YJ020) （2023YJ020）
