【摘要】 研究目的:以某跨海铁路大桥长联、大跨度连续梁桥无砟轨道无缝线路系统为研究对象，对结构受力与变形规律开展研究，提出(60+37×80+60)m连续梁桥上无砟轨道无缝线路铺设方案、钢轨伸缩调节器设置方案，分析列车运行条件下桥上无缝线路的动力特性，提出养护维修建议。研究结论:(1)在(60+37×80+60)m连续梁桥上，采用常阻力扣件或小阻力扣件时必须设置伸缩调节器；(2)列车以350 m/h通过主桥区域时，轨道和桥梁结构的振动特性指标和车辆行驶特性指标均满足规范要求；(3)在钢轨伸缩调节器影响区域内，轮轨的垂向力、轮重减载率均明显增大；(4)结合地震、风浪等偶然荷载因素，建议选用超大量程的伸缩调节器和梁端伸缩装置，加强混凝土连续梁伸缩调节区域轨道状态的在线监测与科学维护；(5)该研究结论可为长联大跨度连续梁无缝线路设计与建造提供借鉴和参考。更多还原

【Abstract】 Research purposes: This paper takes the CWR track system of ballastless track on a long-span continuous beam bridge of a sea-crossing railway bridge as the research object, carries out research on the structural force and deformation law, and proposes(60+37×80 +60) m continuous beam bridge laying plan for CWR track of ballastless track, installation plan of rail expansion joints, analyzes the dynamic performance of the CWR track on the bridge, and puts forward maintenance and repair recommendations.Research conclusions:(1) On(60+37×80+60) m continuous beam bridges, rail expansion joints must be installed when constant and small resistance fastenings are used;(2) When the train passes through the main bridge area at 350 km/h, the vibration characteristic indexes of the track and bridge structure and the vehicle driving characteristic indexes meet the requirements of the specification;(3) In the area affected by the rail expansion joints, the wheel-rail vertical force and the reduction rate of wheel load are significantly increased;(4) In combination with accidental load factors such as earthquakes, wind and waves, it is suggested to select the rail expansion joints with ultra-large range and girder end expansion device, strengthen the on-line monitoring and scientific maintenance of track condition in the rail expansion joint area of concrete continuous beam;(5) The research conclusions can be used to guide the design and construction of CWR track of long-span continuous beam of sea-crossing railway bridge.更多还原