机械清筛对重载铁路常见跨度简支T梁运营性能影响研究  

Study on the Influence of Mechanical Screening on the Operational Performance of Heavy Haul Railway Simple-supported T-shaped Girder

作　　者：刘永前[1,2] 郑晓光 陈树礼[1,2] Liu Yongqian;Zheng Xiaoguang;Chen Shuli(Key Laboratory of Railway Industry of Infrastructure Safety and Emergency Response,Shijiazhuang Tiedao University,Shijiazhuang,Hebei 050043,China;School of Safety Engineering and Emergency Management,Shijiazhuang Tiedao University,Shijiazhuang,Hebei 050043,China)

机构地区：[1]石家庄铁道大学基础设施安全与应急铁路行业重点实验室,河北石家庄050043 [2]石家庄铁道大学安全工程与应急管理学院,河北石家庄050043

出　　处：《铁道技术标准（中英文）》2022年第11期7-13,共7页Railway Technical Standard(Chinese & English)

摘　　要：以某重载铁路常见跨度桥梁大机捣固清筛施工为背景,基于理论分析和现场试验检测相结合的方法,在清筛前后进行试验检测,开展机械清筛对重载铁路简支T梁运营性能影响规律研究。结果表明:采用机械清筛后,道床板结、脏污情况明显改善且整体稳定性得到一定程度提升,桥跨结构横向振幅、竖向振幅、横向加速度、竖向加速度以及墩顶横向振幅等运营性能指标明显改善,而桥跨结构跨中动挠度、动应变和相应动力系数的变化则不明显。This paper takes the tamping and screening construction of a common span bridge of heavy haul railway as an example and combines theoretical analysis with field test detection to study the influence of mechanical cleaning screening on the operational performance of simply supported T-shaped girder of heavy haul railway after performing the test detection before and after screening,The results show that,after mechanical cleaning screening,the slab and dirt condition of track bed are obviously improved and the overall stability is improved.The operational performance indicators of bridge span structure such as lateral amplitude,vertical amplitude,lateral acceleration,vertical acceleration and pier top lateral amplitude are significantly improved,while the changes of dynamic deflection,dynamic strain and coresponding dynamic coeficient of bridge span structure are not obvious.

关 键 词：重载铁路 机械清筛 简支T梁 运营性能 试验检测 

分 类 号：U226[交通运输工程—道路与铁道工程] U24