高速铁路无砟轨道斜拉桥成桥轨面标高控制技术  

Ballastless Track Surface Elevation Control Techniques for High-Speed Railway Cable-Stayed Bridge

作　　者：张志鹏 ZHANG Zhipeng(Southeast Coastal Railway Fujian Co.,Ltd.,Fuzhou 350013,China)

机构地区：[1]东南沿海铁路福建有限责任公司,福建福州350013

出　　处：《世界桥梁》2024年第5期43-47,共5页World Bridges

基　　金：中国铁建股份有限公司科研计划课题(16-C53)。

摘　　要：福厦高铁安海湾特大桥主桥为(40+135+300+135+40)m双塔双索面钢-混结合梁斜拉桥,采用半飘浮体系。针对高速铁路大跨斜拉桥主梁架设和无砟轨道铺设精度控制技术难度大,成桥轨面标高易超限的问题,采用现场测试及理论计算分析成桥轨面标高偏差的原因,确定桥面防水防护层混凝土超厚和道床板模拟重量误差为两大主因;研究斜拉索调索、桥面荷载加载或卸载等措施对主梁线形的影响,并提出仅微调边跨端部4对斜拉索索力的轨面标高精调方案。实践证明,该方案经济有效,将轨面标高偏低量控制在10 mm以内,偏高量控制在4 mm以内,通过扣件调整使成桥线形满足目标要求。The main bridge of Anhai Bay Bridge carrying a portion of Fuzhou-Xiamen High-speed Railway is a two-pylon,steel-concrete composite girder,cable-stayed bridge with a main span of 300 m,two spans of 135 m and two spans of 40 m.The stay cables are arranged in double cable planes.The erection accuracy control for the main girder and ballastless tracks of the long-span high-speed railway cable-stayed bridge is quite challenging,and the track elevation after the completion of the bridge is prone to surpass the limit.The causes of track elevation bias were analyzed via on-site measurement and theoretical calculation,and the over-thick waterproof layer of the concrete deck and the simulated weight errors of track slab were considered the two main causes.The effects of different measures on the main girder alignment were analyzed,including stay cable tension adjustment,applying loads and deloading on deck.It was determined to slightly adjust the tensions of 4 end pairs of stay cables to achieve the accurate tuning of the track elevation.The engineering practice proves that the measure proposed is economical and efficient.When the lower and upper alignment bias limits are controlled within 10 mm and 4 mm,respectively,the fasteners can be tuned to enable the alignment of the completed bridge meet the target.

关 键 词：斜拉桥 高速铁路 无砟轨道 轨面标高 成桥线形 偏差 精调方案 控制技术 

分 类 号：U448.13[建筑科学—桥梁与隧道工程] U443.35[交通运输工程—道路与铁道工程] U445.1