高铁常用跨度简支梁桥上轨道周期性不平顺影响分析  

Effect of Periodic Track Irregularities on Simply Supported Beam Bridge with Common Span for High-Speed Railway

作　　者：李东昇[1] 杨飞[2] 马慧君 LI Dongsheng;YANG Fei;MA Huijun(Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;Infrastructure Inspection Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;Department of Track,Communication&Signaling and Power Supply,China State Railway Group Co.,Ltd.,Beijing 100844,China)

机构地区：[1]中国铁道科学研究院铁集团有限公司铁道建筑研究所,北京100081 [2]中国铁道科学研究院铁集团有限公司基础设施检测研究所,北京100081 [3]中国国家铁路集团有限公司工电部,北京100844

出　　处：《中国铁道科学》2020年第3期59-67,共9页China Railway Science

基　　金：中国铁路总公司科技研究开发计划课题(N2018G032);中国国家铁路集团有限公司科技研究开发计划课题(N2019G012)。

摘　　要：通过对桥梁徐变上拱设计和相应规定、轨道不平顺检测方法、实测资料以及线路规范的对比和理论计算,进行高铁常用跨度预应力混凝土简支梁桥上轨道产生波长为32 m的轻微周期性不平顺现象研究。结果表明:线路、桥梁规范中线路高低Ⅰ级管理值、梁跨竖向残余变形的规定是一致的;轨面不平顺静、动态检测结果不可以用来直接对比;京沪高铁桥上轨道周期不平顺的桥跨长度占比随着时间发展逐渐增大,开通4年后占比持平至约66%,桥上轨道周期性不平顺峰值均值、标准差及变异系数分别约为2.28 mm,0.57 mm和0.25;开通5年后98.4%,99.9%和100%的桥上轨道周期性高低不平顺峰值分别小于5,6和7 mm;当连续多跨简支梁徐变值均大于3 mm时,线路TQI高低已超过规范管理限值,建议通过轨面设置反预拱度,避免由梁体徐变带来的大面积轨道精调作业。Based on the comparison and theoretical calculation of the design and the corresponding regulations of the bridge creep camber, the track irregularity detection method, the measured data and line specifications, the slight periodic irregularity with the wavelength of 32 m on the track of the prestressed concrete simply supported beam bridge with common span for high-speed railway was studied. Results show that the provisions of the high and low grade I management values of the line and bridge codes and the vertical residual deformation of the beam span are consistent. The static and dynamic detection results of rail surface irregularities can not be used for direct comparison. The bridge span length proportion of track periodic irregularities on the Beijing-Shanghai high-speed railway bridge increases gradually with the development of time, reaching about 66% from flat after 4 years of operation. The peak-to-peak mean value, standard deviation and variation coefficient of track periodic irregularities on the bridge are about 2. 28 mm, 0. 57 mm and 0. 25 respectively. After 5 years of operation,98. 4%, 99. 9% and 100% of the peak-to-peak values of track periodic irregularities on the bridge are less than 5 mm, 6 mm and 7 mm respectively. When the creep values of continuous multi-span simply supported beams are all greater than 3 mm, resulting in the TQI of the line exceeding the standard management limit. It is suggested to set the reverse pre-camber on the rail surface to avoid the large-area rail fine adjustment operation caused by the creep of beam body.

关 键 词：高速铁路 简支梁 常用跨度 徐变 上拱 轨道 高低不平顺 TQI 

分 类 号：U213.2[交通运输工程—道路与铁道工程] U448.213[建筑科学—桥梁与隧道工程]