鳊鱼洲长江大桥轨道几何变化规律研究
Track Geometry Variation Law of Bianyuzhou Yangtze River Bridge
徐春山 1汪军青 1马卓然 2龚海松 1王毅刚 1凌烈鹏2
作者信息
- 1. 中国铁路南昌局集团有限公司九江桥工段,江西九江 332005
- 2. 中国铁道科学研究院集团有限公司铁道建筑研究所,北京 100081;中铁科学技术开发有限公司,北京 100081;高速铁路轨道系统全国重点实验室,北京 100081
- 折叠
摘要
鳊鱼洲长江大桥是京港高铁安九段的控制工程,具有设计速度高、活荷载大、技术要求高等特点.作为我国最大跨度的钢箱-混凝土混合梁斜拉桥,大桥在复杂外部环境作用下力学行为显著,并会对上部轨道结构状态造成影响.为保证线路长期安全稳定运营,对鳊鱼洲长江大桥轨道几何变化规律开展系统研究.基于鳊鱼洲长江大桥轨道动态检测数据,对大桥完整高温-低温周期内的轨道几何特征进行分析,通过计算轨道几何单项标准差和轨道质量指数,对轨道几何状态进行评价.结果表明,大桥整体服役状态良好,满足我国轨道几何质量管理要求,现场需重点关注主通航孔桥梁端区域的几何状态变化情况.
Abstract
Bianyuzhou Yangtze River Bridge is critical works of the Anqing-Jiujiang Section of Beijing-Hong Kong HSR.It features a high design speed,substantial live loads,and stringent technical requirements.As the steel box-concrete composite girder cable-stayed bridge with the largest span in China,the bridge exhibits significant mechanical performance under the influence of complex external environments,which can affect the upper track structure.To ensure the long-term safe and stable operation of the railway,this paper conducts a systematic study on the track geometry variation law of Bianyuzhou Yangtze River Bridge.Based on the dynamic inspection data of the track on the Bianyuzhou Yangtze River Bridge,this paper analyzes the track geometric characteristics throughout the complete high-temperature and low-temperature cycles and evaluates track geometry by calculating the standard deviation of individual geometric parameters and the track quality index.The results indicate that the overall service condition of the bridge is good,meeting the track geometry quality management requirements in China.However,special attention should be given to the geometric condition changes in the bridge end areas of the main navigable span.
关键词
大跨度桥梁/鳊鱼洲长江大桥/轨道动态检测数据/轨道几何状态/轨道质量指数Key words
long-span bridge/Bianyuzhou Yangtze River Bridge/track dynamic inspection data/track geometry/track quality index引用本文复制引用
基金项目
中国铁路南昌局集团有限公司科技研究开发计划项目(202312)
出版年
2024
NETL
NSTL
万方数据