小半径曲线段联络通道T接部位振动响应实测研究  

Field Measurement Study on Vibration Response of T-shape Junction Consisting of Connection Aisle and Metro Tunnel in Small-radius Curved Sections

作　　者：黄强[1] 卞士海 马永政 崔正阳 邱波 HUANG Qiang;BIAN Shihai;MA Yongzheng;CUI Zhengyang;QIU Bo(School of Civil and Environmental Engineering and Geography Science,Ningbo University,Ningbo 315211,Zhejiang,China;Zhejiang Engineering Survey and Design Institute Group Co.,Ltd.,Ningbo 315012,Zhejiang,China;School of Architecture and Transportation Engineering,Ningbo University of Technology,Ningbo 315211,Zhejiang,China;Construction Branch,Ningbo Rail Transit Group Co.,Ltd.,Ningbo 315101,Zhejiang,China)

机构地区：[1]宁波大学土木工程与地理环境学院,浙江宁波315211 [2]浙江省工程勘察设计院集团有限公司,浙江宁波315012 [3]宁波工程学院建筑与交通工程学院,浙江宁波315211 [4]宁波市轨道交通集团有限公司建设分公司,浙江宁波315101

出　　处：《噪声与振动控制》2025年第2期287-292,297,共7页Noise and Vibration Control

基　　金：国家自然科学基金资助项目(52008214);宁波市自然科学基金资助项目(2023J083)。

摘　　要：联络通道与主隧道交叉部位(“T接部位”)是地铁隧道中对振动响应较为敏感和薄弱的部位。以宁波地铁5号线小半径曲线段隧道为例,对机械法联络通道T接部位和独立隧道分别进行地铁振动测试,揭示联络通道存在对地铁主隧道振动响应的影响。研究表明,T接部位的加速度峰值小于独立隧道,前者的钢轨、道床、隧道壁的竖向加速度峰值比后者分别减少11.42%、40%、34.21%,表明联络通道存在对地铁主隧道振动有减弱作用。小半径段T接部位仍以竖向振动为主,但横向的振动响应很显著,主隧道外侧峰值加速度大于内侧。T接部位的总体加速度振级小于独立隧道,但低频段的1/3倍程加速度振级更大。T接部位以中高频振动为主,钢轨、道床、隧道壁振动主频段中心频率在3 000、2 000、1 000 Hz左右。研究可为机械法联络通道T接部位的环境振动分析提供参考。The junction composed of connection aisle and main metro tunnel(called as T-shape junction)is a relatively more sensitive and vulnerable component to the train-induced vibration in the metro tunnel.Taking a small-radius curved tunnel section of Ningbo Metro Line 5 as an example,field vibration measurement was conducted on the separated tunnel and T-shape junction consisting of mechanical connection aisle and metro tunnel to reveal the influence of connection aisle on the vibration response of the main metro tunnel.Researches show that peak accelerations at the T-shape junction are smaller than those of the separated tunnel,the peak vertical accelerations of rail,track bed and tunnel wall of the former are decreased by about 11.42%,40%,and 34.21%respectively in comparison with the latter,indicating that the existence of connection aisle has the effect of vibration reduction of the main metro tunnel.Vertical vibration is still the primary vibration form in the small-radius T-shape junction,but the transverse vibration is significant.The peak accelerations on the outer side of the main tunnel are greater than those on the inner side.The overall acceleration levels of the T-shape junction are less than those of the separate tunnel,but the one-third octave acceleration levels of T-shape junction in the low-frequency range are greater.The vibration of the T-shape junction in small-radius section is mainly high-frequency vibration,and the center frequencies of the main vibration frequency bands of rail,track bed,and tunnel wall vibration are around 3000,2000,and 1000 Hz,respectively.The present research may provide a reference for the environmental vibration analysis of the mechanical T-shape junction in the metro tunnels.

关 键 词：振动与波 T接部位 联络通道 地铁振动测试 振动加速度 加速度振级 加速度频谱 

分 类 号：U25[交通运输工程—道路与铁道工程]