Faculty of Engineering, China University of Geosciences, Wuhan, 430074, China.
School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, China.
Environ Sci Pollut Res Int. 2021 Sep;28(33):45903-45919. doi: 10.1007/s11356-021-14015-0. Epub 2021 Apr 21.
Vibration of the elevated urban rail transit (URT) severely affects the health of nearby residents, threatens the integrity of adjacent historic buildings, and aggravates the performance of vibration-sensitive instruments in buildings, and the accompanied annoying structure-borne noise always arouses public complaint. Vibration and noise mitigation measures through track structures and/or noise barriers are increasingly favored to deal with these challenging issues. This paper presents systematic field measurements on noise and vibrations of elevated URT. The vibration experiment covers vibration of track structures, bridge girders and piers, and ground soil under three different track structures, i.e., embedded sleeper track, ladder sleeper track, and floating slab track (FST) with rubber mats. Noise measurements were also conducted considered the effect of track structures and with or without fully enclosed noise barriers. It is shown that ladder sleeper track and FST were more effective in control bridge vibration than ground vibration. The overall vibration level of the bridge is 8~10 dB greater than the ground vibrations. The noise reduction effect through track structure was limited for far-field ground. Furthermore, it is found that the noise barrier was more effective to reduce near-field wheel/rail rolling noise rather than far-field noise. Good correlation between structure-borne noise and vibration was observed for both the embedded sleeper track and FST at the bottom slab of the box girder bridge.
高架城市轨道交通（URT）的振动严重影响附近居民的健康，威胁到邻近历史建筑的完整性，并加剧建筑物中对振动敏感的仪器的性能，同时伴随的恼人的结构传播噪声总是引起公众投诉。通过轨道结构和/或隔音屏障来减轻振动和噪声的措施越来越受到青睐，以应对这些具有挑战性的问题。本文对高架 URT 的噪声和振动进行了系统的现场测量。振动实验涵盖了三种不同轨道结构（嵌入式轨枕轨道、梯式轨枕轨道和带有橡胶垫的浮置板轨道（FST））下的轨道结构、桥梁主梁和桥墩以及地面土壤的振动。还考虑了轨道结构的影响，以及是否有全封闭隔音屏障，进行了噪声测量。结果表明，梯式轨枕轨道和 FST 比地面振动更能有效地控制桥梁振动。桥梁的整体振动水平比地面振动高 8~10dB。轨道结构的降噪效果对远场地面有限。此外，发现隔音屏障对减少近场轮轨滚动噪声比远场噪声更有效。对于嵌入式轨枕轨道和 FST，在箱梁桥的底部板上都观察到了结构传播噪声与振动之间的良好相关性。
