城市轨道交通宽枕板式固化道床轨道结构动力特性  

Dynamic Characteristics of Track Structure with Wide SleeperSlab Solidified Ballast Bed in Urban Rail Transit

作　　者：徐旸 刘启宾[2] 王红 郄录朝 楼梁伟 余文颖 易强 XU Yang;LIU Qibin;WANG Hong;QIE Luchao;LOU Liangwei;YU Wenying;YI Qiang(Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;China Railway First Survey and Design Institute Group Co.,Ltd.,Xi’an Shaanxi 710043,China)

机构地区：[1]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 [2]中铁第一勘察设计院集团有限公司,陕西西安710043

出　　处：《中国铁道科学》2021年第4期19-26,共8页China Railway Science

基　　金：国家自然科学基金青年基金资助项目(51808556);中国国家铁路集团有限公司科技研究开发计划课题(P2019G030);中国铁道科学研究院集团有限公司院基金课题(2020YJ204)。

摘　　要：以乌鲁木齐城市轨道交通1号线为依托,设计宽枕板式聚氨酯固化道床轨道结构,并进行动力特性和减振性能研究。结果表明:与无砟轨道结构相比,宽枕板式聚氨酯固化道床轨道结构在列车振动荷载作用下会产生迟滞弹性变形,有利于能量耗散,轮轨垂向力均值及峰值分别减少17.9%和9.8%;无砟轨道结构脱轨系数在0.04~0.22范围内,而宽枕板式聚氨酯道床轨道结构脱轨系数在0.03~0.08范围内,行车稳定性更高;与无砟轨道结构相比,宽枕板式聚氨酯固化道床轨道结构的Z振级插入损失为8.1 dB,最大插入损失为11.18 dB,对应中心频率为40 Hz,具有较好减振性能。The track structure with wide sleeper slab polyurethane solidified ballast bed was designed to study the dynamic characteristics and the vibration reduction performance based on the Line 1 of Urumqi urban rail transit.The results show that:compared with the structure of ballastless track,the track structure with wide sleeper slab polyurethane solidified ballast bed will produce hysteretic elastic deformation under train vibration load,which conduces to energy dissipation.The reductions of the mean and the peak of the wheel-rail vertical stress are 17.9%and 9.8%respectively.The derailment coefficient of ballastless track structure is in the range of 0.04-0.22,while the derailment coefficient of the track structure with wide sleeper slab polyurethane solidified ballast bed is in the range of 0.03-0.08,which has a higher driving stability.Compared with the structure of ballastless track,the insertion loss of Z vibration level of the track structure with wide sleeper slab polyurethane solidified ballast bed is 8.1 dB,the maximum insertion loss is 11.18 dB and the corresponding center frequency is 40 Hz,which has better vibration reduction performance.

关 键 词：城市轨道交通 轨道结构 宽枕板式聚氨酯固化道床 动力特性 减振性能 

分 类 号：U213.7[交通运输工程—道路与铁道工程]