城市快速路噪声影响预测及声屏障降噪效果模拟研究  

Prediction of Noise Impact of Urban Expressway and Simulation Study on Noise Reduction Effect of Noise Barrier

作　　者：徐文文 王玉红 郭晓峰 吕相龙 黄峰 张玮 XU Wen-wen;WANG Yu-hong;GUO Xiao-feng;Lu Xiang-long;HUANG Feng;ZHANG Wei(China Design Group Co.,Ltd.,Nanjing 210014,China;Jiangsu Transportation Environment Protection Engineering Technology Centre,Nanjing 210014,China)

机构地区：[1]华设设计集团股份有限公司,江苏南京210014 [2]江苏省交通运输环境保护工程技术研究中心,江苏南京210014

出　　处：《环境科技》2022年第6期31-34,40,共5页Environmental Science and Technology

基　　金：江苏省环保科技项目(2018014);江苏省交通运输科技转化项目重大专项(2019Y70).

摘　　要：为预测快速路对沿线敏感点的噪声贡献特征,利用Cadna/A软件对不同形式声屏障降噪效果进行模拟分析。结果表明:地面辅道噪声贡献值一般低于高架5~10 dB(A),高架段临街首排噪声峰值约在12层出现,地面段约在5~7层出现;对于城市高架,直立型声屏障有效降噪楼层一般低于10层;声屏障降噪效果随着延伸长度的增加而增加,但增加幅度逐步降低;声屏障的降噪效果随着敏感点距离的增加逐渐降低,而有效降噪楼层逐渐增加;全封闭声屏障有效降噪楼层显著增加,“侧分带+中分带”声屏障相比于单侧声屏障可增加有效降噪楼层3~4层。In order to predict the noise contribution characteristics of expressways to sensitive points along the line,Cadna/A software is used to simulate and analyze the noise reduction effects of different forms of noise barriers.The results show-that the noise contribution value of the ground auxiliary road is generally 5~10 dB(A)low-er than that of the elevated road.The peak value of the first row of noise near the street in the elevated road section appears at the 12th floor,and the ground section appears at the 5th to 7th floor;For urban viaducts,the effective noise reduction floors of vertical sound barriers are generally lower than 10 floors;The noise reduction effect of the sound barrier increases with the increase of the extension length,but the increase amplitude decreases gradually;The noise reduction effect of noise barrier decreases w-ith the increase of sensitive point distance,while the effective noise reduction floors increase gradually;The total enclosed sound barrier can significantly increase the number of effective noise reduction floors,and the"side band+middle band"sound barrier can increase the number of effective noise reduction floors by 3~4 compared with the single side sound barrier.

关 键 词：城市快速路 噪声预测 声屏障 Cadna/A 

分 类 号：X5[环境科学与工程—环境工程]