随着朔黄铁路扩能运输的快速推进，单元列车轴重从21 t逐步提升到25 t，年运量即将突破2亿t，荷载与疲劳效应的增加对既有铁路桥梁特别是中小跨径桥梁的安全运营要求越来越高。分析重载运输对桥梁的主要影响因素，采取桥梁检查、安全状态评估、快速维修加固、加强维修质量验收相结合等系列应对措施，提出桥梁科学维管的对策，为建立桥梁安全运营保障体系奠定基础。%With the rapid advance of the capacity expansion transportation of Shuohuang railway, the unit train axle load is gradually promoted from 21 t to 25 t and the annual transporting quantity would exceed 200 million tons.Due to the increase of load and fatigue effect,the safety operation of the existing railway bridges especially the small and medium span bridges is demanded increasingly. Through the analysis of the main influence factors of heavy haul transportation on bridges,some sci-entific countermeasures of bridge maintenance management are proposed as following:inspection of the bridge,evaluation of security status,quick maintenance and reinforcement and intensification of the acceptance of maintenance quality.The scientific countermeasures on maintenance management of bridge are put forward which would lay the foundation for building the safety operation guarantee sys-tem of the bridge.
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