摘要
目前我国城市轨道交通在快速发展,随之带来的地铁隧道振动噪声问题也受到广泛关注。地铁车辆在运行时产生的振动会经道床、隧道壁等传播至地面上方建筑物,这种振动和噪声会对居民的生活、工作和休息产生影响。为掌握地铁隧道曲线段高峰期振动传播规律,对某市地铁4号线某区段隧道内及地面和室内振动进行现场测试。基于实测结果,在时、频域内分析研究地铁隧道曲线段高峰期列车引起的振动传播规律,为后续减振降噪措施提供依据。在选定试验区段的基础上,选取1个地下截面进行隧道振动、轮轨力、位移测试、浮置板固有频率测试,地上测试选择与截面对应的地面进行高峰时段垂向振动加速度测试。结果表明:钢轨与道床的振动总极值基本相差不大,而振动衰减最大的位置是在于浮置板道床向隧道壁传递,衰减大约40dB(Z),其次是隧道壁向地面的振动衰减,大约为20dB(Z)。振动由室外向室内传递过程基本变化不大。
The rapid development of urban rail transport in China has brought with it the created problem of vibration and noise in the underground tunnels, which has received widespread attention. The vibration generated by the underground vehicles during operation will be transmitted to the buildings above the ground through the roadbed and tunnel walls, and this vibration and noise will have an impact on the residents’ life,work and rest. In order to grasp the vibration propagation pattern during peak hours in the curved section of the metro tunnel, field tests were carried out in the tunnel and on ground and indoor vibration in a section of metro line 4 in a city. Based on the measured results, the vibration propagation pattern caused by trains during peak hours in the curved section of the metro tunnel was analysed in the time and frequency domain to provide a basis for subsequent vibration and noise reduction measures. On the basis of the selected test section, one underground section was selected for tunnel vibration, wheel-rail force and displacement tests, and floating plate inherent frequency tests, while the ground level corresponding to the section was selected for peak hour vertical vibration acceleration tests. The results show that: the total vibration extremes of the rail and bed are basically not very different, while the vibration attenuation is the largest in the floating plate bed to the tunnel wall, attenuation of about 40dB(Z), followed by the tunnel wall to the ground vibration attenuation, about 20dB(Z). The transmission of vibration from outdoors to indoors is largely unchanged.
作者
王迪瀚
罗雁云
WANG Dihan;LUO Yanyun(Institute of Rail Transit,Tongji University,Shanghai 201804,China)
出处
《综合运输》
2023年第1期108-111,共4页
China Transportation Review
关键词
隧道
轨道交通
减振降噪
地面噪声
振动传播规律
Tunnels
Railways
Vibration and noise reduction
Ground noise
Vibration propagation patterns
