摘要
针对目前日趋严重的城市轨道交通产生的噪声污染问题,结合某一高架轻轨结构实例,首先对该高架轻轨线路的噪声进行了预测分析,然后根据该例实际情况设计出适合的声屏障降噪,并进行降噪分析.结果表明当列车以100 km/h的速度驶过,对于距离20 m处的一建筑物各层的瞬时噪声级都达到近90 dB(A),并且与高架桥高度水平的层高处噪声级最高.当采用隔声式声屏障进行降噪后的噪声分析得到,底层的降噪效果最明显,随着建筑物高度的增加,降噪效果有所降低.
In this paper, aiming at the noise pollution of urban rail transit in recent years, prediction and analysis of noise caused by an over-head light rail transit are performed firstly. According to the practical situation of this light rail transit, proper style of acoustic barrier is adopted to reduce the noise. The research results show that the noise level of all the floors of a building 20 m away from the rail transit approaches 90 dB if the train running at speed of 100 kin/h, and the noise level of the floor as high as the rail is highest. After the acoustic barrier is used, the effect of noise control is most obvious in the lowest floor, and becomes lower as the height increases.
出处
《河南科学》
2012年第3期356-359,共4页
Henan Science
关键词
城市轨道交通
噪声分析
降噪
声屏障
urban rail transit
noise analysis： noise reduction
acoustic barrier
