U型槽地道噪声对沿线居住区影响的仿真模拟

Simulation and Analysis of U-shaped Tunnel Noise Effect on the Residential Districts along the Line

文章利用Cadna/A软件建立U型槽地道及地面交通3D仿真模型,研究地道敞开段交通噪声与道路交通的综合噪声对沿线建筑的影响。文章创造性的在封闭箱体段两端洞口设置垂直面声源模拟箱体内混响噪声,利用Cadna/A软件建立由地面逐渐向下延伸的低于地表的U型槽道路模型,得出地道类设施交通噪声影响及与地面轻轨、轨道、道路等交通噪声叠加值对沿线建筑影响规律,以及运营期不同距离、不同高度处沿线建筑受交通噪声影响结果,并通过设置声屏障对比设置声屏障前后的噪声影响差异,为工程有针对性的实施环保措施提供了科学依据。

This paper established a 3D simulation model for U-shaped tunnel and ground traffic using Cadna/A,in order to research the mixed effect of open tunnel traffic noise and road traffic noise on the buildings along the line.This paper set up a vertical plane sound source at both entrances of a enclosed box creatively to simulate a mixed noise in the box,and built a downward-extending U-shaped tunnel model using Cadna/A,identifying the law of the effect of tunnel facilities,as well as the mixed effect of ground light rail,railway and road noises,on the buildings along the line,and on the buildings at different heights and distances from the line.Then,the paper set up a noise barrier to identify whether the noise effect was changed by the barrier,providing a scientific basis for targeted implementation of environmental protection measures in engineering.