时速80 km/h地铁地下线梯形轨枕轨道现场测试分析  

Test and Analysis of Ladder Sleeper Ballast in Subway with Speed of 80 km/h Metro

作　　者：刘力 张胜龙 王文斌 李玉路 赵梦拴 LIU Li;ZHANG Sheng-long;WANG Wen-bin;LI Yu-lu;ZHAO Meng-shuan(Urban Rail Transit Center, China Academy of Railway Sciences Co. Ltd. , Beijing 100081, China;China Academy of Railway Sciences Co. Ltd. , Beijing 100081, China)

机构地区：[1]中国铁道科学研究院集团有限公司城轨轨道交通中心,北京100081 [2]中国铁道科学研究院集团有限公司,北京100081

出　　处：《科学技术与工程》2020年第12期4878-4883,共6页Science Technology and Engineering

基　　金：国家自然科学基金(51608534);中国铁道科学研究院基金(2017YJ150,2018YJ164)。

摘　　要：为评价时速80 km/h地铁作用下梯形轨枕的工作性能,对北京地铁某线梯形轨枕道床进行现场动位移和加速度测试,从时域、频域和Z振级角度对加速度指标进行分析,从时域角度对动位移数据进行分析,评价梯形轨枕轨道工作性能。结果表明:地铁列车作用下普通道床钢轨、道床和隧道壁振动有效值为14.1、0.48、0.069 m/s^2,梯形轨枕断面对应测点振动有效值为18.1、0.62、0.016 m/s^2,隧道壁处振动加速度在1~1000 Hz内均有一定减振效果,最大Z振级差值为11.9 dB,梯形轨枕道床钢轨垂向、钢轨横向、梯轨垂向、梯轨横向最大动位移分别为0.34、0.13、1.21、0.081 mm。In order to evaluate the working performance of the metro ladder sleeper ballast under the action of 80 km/h metro,the dynamic displacement and acceleration of ladder sleeper ballast on a line of Beijing Metro were measured.The acceleration index was analyzed from the perspectives of time domain,frequency domain and Z vibration level,and the dynamic displacement data was analyzed by time domain to evaluate the performance of the metro ladder sleeper track.The results indicate that under the action of subway trains,the vibration effective values of ordinary ballast rail,tunnel bed and tunnel wall are 14.1,0.48 and 0.069 m/s^2,and the corresponding vibration effective values of ladder sleeper ballast section are 18.1,0.62 and 0.016 m/s^2.The tunnel wall in vibration acceleration within 1~1000 Hz has certain vibration reduction effect,and maximum Z vibration differential value is 11.9 dB.Values of trapezoidal sleeper track rail vertical,lateral,vertical ladder rail,rail track horizontal maximum dynamic displacement are 0.34,0.13,1.21 and 0.081 mm respectively.

关 键 词：梯形轨枕 现场测试 减振效果 地铁 

分 类 号：U231.36[交通运输工程—道路与铁道工程]