地铁列车振动对盾构隧道结构影响试验研究  

Vibration Measurement of Shield Tunnel Induced by Subway Trains

作　　者：秦银刚[1] 黄海峰[2] QIN Yingang;HUANG Haifeng(Tianjin Rail Transit Group Co. ,Ltd. ,Tianjin,300392,China;Key Laboratory of Transportation Tunnel Engineering of Ministry of Education, Southwest Jiaotong University, Chengdu, Sichuan 610031, China)

机构地区：[1]天津市地下铁道集团有限公司,天津300392 [2]西南交通大学交通隧道工程教育部重点实验室,四川成都610031

出　　处：《公路工程》2021年第6期8-14,22,共8页Highway Engineering

基　　金：国家自然科学基金项目(51778540,51678501);天津市建委科技项目(2017-19)。

摘　　要：为研究不同地铁运营条件下列车对周围环境及盾构隧道引起的振动问题,以天津地铁5号线某建成营运区段为工程背景,通过现场试验,取得列车在经过不同测试断面时的载客情况、瞬时速度等运行工况,实测了盾构区间内列车经过时轨枕、轨道板及隧道壁的振动加速度。通过对实测信号进行时频分析,探究了列车作用下,引起轨道及隧道结构的振动响应规律,验证了减震道床结构的有效性,结果表明:盾构区间垂向加速度响应主要分布在40~70 Hz和200~450 Hz这2个频率范围;盾构区间轨道结构及隧道衬砌振动响应幅值与列车载客量正相关,此为后续开展关于列车荷载对隧道结构动力响应影响规律的进一步研究奠定了基础。Subway trains under different operating conditions and study of the environment caused by the vibration of shield tunnel,Tianjin Metro Line 5 a completed operating segment for the engineering background,field test,the case made passenger trains when passing through the different sections of the test instantaneous speed operating conditions,the measured vibration acceleration sleeper,the rail plate and the wall of the tunnel section within the shield after the train.Through the frequency analysis of the measured signal,explores the effect of the train,track and vibration caused by the response of tunnel structure,the validity of the damping track bed structure results show that the shield section vertical acceleration response mainly in 40~70 Hz and 200~450 Hz two frequency ranges;shield zone track structure and tunnel lining vibration amplitude response and positive correlation passenger train,train loads for the subsequent conduct on the influence of further research laid the foundation for structural dynamic response of the tunnel.

关 键 词：列车荷载 盾构隧道 振动 现场试验 

分 类 号：U451[建筑科学—桥梁与隧道工程]