School of Civil Engineering and Transportation, South China University of Technology, Guangzhou, Guangdong 510641, China; Department of Civil and Environmental Engineering, Tufts University, Medford, MA 02155, USA.
School of Civil Engineering and Transportation, South China University of Technology, Guangzhou, Guangdong 510641, China.
Sci Total Environ. 2017 Jan 1;575:1339-1351. doi: 10.1016/j.scitotenv.2016.09.216. Epub 2016 Oct 1.
Transit-oriented development, such as metro depot and over-track building complexes, has expanded rapidly over the last 5years in China. Over-track building construction has the advantage of comprehensive utilization of land resources, ease of commuting to work, and provide funds for subway construction. But the high frequency of subway operations into and out of the depots can generate excessive vibrations that transmit into the over track buildings, radiate noise within the buildings, hamper the operation of vibration sensitive equipment, and adversely affect the living quality of the building occupants. Field measurements of vibration during subway operations were conducted at Shenzhen, China, a city of 10.62 million people in southern China. Considering the metro depot train testing line and throat area train lines were the main vibration sources, vibration data were captured in five measurement setups. The train-induced vibrations were obtained and compared with limitation of FTA criteria. The structure-radiated noise was calculated using measured vibration levels. The vertical vibration energy directly passed through the columns on both sides of track into the platform, amplifying vibration on the platform by up to 6dB greater than ground levels at testing line area. Vibration amplification around the natural frequency in the vertical direction of over-track building made the peak values of indoor floor vibration about 16dB greater than outdoor platform vibration. We recommend to carefully examining design of new over-track buildings within 40m on the platform over the throat area to avoid excessive vertical vibrations and noise. For both buildings, the measured vertical vibrations were less than the FTA limit. However, it is demonstrated that the traffic-induced high-frequency noise has the potential to annoy occupants on the upper floors.
在过去的 5 年中，中国的地铁车站和跨线建筑综合体等交通导向型发展迅速。跨线建筑的建设具有综合利用土地资源、便于通勤和为地铁建设提供资金的优势。但是，地铁频繁进出车站会产生过多的振动，这些振动会传递到跨线建筑物中，在建筑物内产生噪声，干扰对振动敏感设备的运行，并对建筑物居住者的生活质量产生不利影响。在中国南方人口 1062 万的深圳市进行了地铁运营期间的振动现场测量。考虑到地铁车站的列车测试线和咽喉区列车线路是主要的振动源，在五个测量设置中捕获了振动数据。获得了列车引起的振动，并与 FTA 标准的限制进行了比较。使用测量的振动水平计算了结构辐射噪声。列车引起的振动通过轨道两侧的立柱直接传递到平台上，使测试线区域平台上的振动放大了高达 6dB。跨线建筑物垂直方向的固有频率周围的振动放大使室内地板振动的峰值比室外平台振动高 16dB。我们建议在咽喉区平台上方 40m 范围内仔细检查新的跨线建筑物的设计，以避免过度的垂直振动和噪声。对于这两栋建筑物，测量的垂直振动均低于 FTA 限值。然而，事实证明，交通引起的高频噪声有可能使上层居民感到烦恼。
