控制轨道交通噪声道间声屏障研究

THE STUDY ON NOISE BARRIER BUILT BETWEEN TWO PATHS TO CONTROL THE RAILWAY TRAFFIC NOISE

应用环境噪声预测与分析软件SOUNDPLAN对将设置在上海轨道交通6#线上下行线之间的道间声屏障插入损失进行了模拟计算。计算结果表明,安装道间声屏障可使得距离线路20～30m远的较高层建筑获得2～4.7dB的降噪效果;随着两侧声屏障高度的增加,安装道间声屏障对待测表面的影响范围在缩小;离轨道线路越近,道间声屏障的插入损失越大。

The insertion loss of the noise barrier built between the two paths of the sixth track-traffic in Shanghai is calculated by the software SOUNDPLAN,which is used for predicting and analyzing noise environment.The calculated results indicate that the noise barrier built between paths can make the sound pressure level at the distance of 20～30 m decrease by 2～4.7 dB.As the height of the noise barriers installed along both sides increases,the incidence of the noise barrier built between paths will reduce.The nearer the building is away from railway,the bigger the insertion loss of the noise barrier built between paths becomes.