基于传递函数标定法的异型盾构隧道地铁列车运行振动分析  

Vibration Analysis of Metro Train Operating in Special Shape Shield Tunnel Based on Transfer Function Calibration Method

作　　者：张啟乐 董连东 刘林芽[2] 拜立岗 马广驰 李枫 ZHANG Qile;DONG Liandong;LIU Linya;BAI Ligang;MA Guangchi;LI Feng(China Electronic System Engineer ing Engineering No.2 Construction Co.,Ltd.,214028,Wuxi,China)

机构地区：[1]中国电子系统工程第二建设有限公司,无锡214028 [2]华东交通大学铁路环境振动与噪声教育部工程研究中心,南昌330013

出　　处：《城市轨道交通研究》2021年第12期141-145,共5页Urban Mass Transit

摘　　要：基于某城市地铁的异型盾构隧道,采用实际场地传递函数标定数值模型的方法,对异型盾构隧道地铁振动问题进行了研究。研究结果表明:异型盾构隧道埋深增加量与Z振级衰减量不是线性关系;单从地铁环境振动控制角度而言,存在1个最佳经济埋深,本算例的最佳经济埋深为15~20 m;地铁列车运行引起的80 Hz以上频段的振动衰减非常快,传至地面时振动峰值频率为63 Hz;若采用钢弹簧浮置板进行隔振,隧道正上方地面位置Z计权总振级可以减小14.6 dB。Based on the special shape shield tunnel of certain urban metro,the issue of metro vibration in special shape shield tunnel is studied,adopting the method of transfer function calibration numerical model on actual site.The results show that:the increased value of tunnel buried depth is not linear with the VLz attenuation.From the perspective of vibration control of metro environment,there is an optimal economic burial depth.The optimal economic burial depth of this study case is 15~20 m.Vibration caused by metro train operating with a frequency above 80 Hz attenuates very quickly,and when it propagates to the ground,the peak frequency is 63 Hz.If FST(floating slab track)is used for vibration isolation in track system,the VLz of ground surface right above the tunnel can be reduced by 14.6 dB.

关 键 词：地铁振动 异形盾构隧道 传递函数标定法 

分 类 号：U451.3[建筑科学—桥梁与隧道工程]