道路交通噪声预测模式预测结果的比较

为了分析实际环境影响评价中常用的各种公路交通噪声预测模型预测结果之间存在的差异,并验证各预测方式与实测值之间的相符性,通过对选取的高速公路和市政快速公路采用各种预测模型计算比较,并用实际监测值对各模型预测结果进行验证,结果发现,不同的预测方式会造成预测结果之间昼间4～9 dB、夜间5～10 dB的差异,采用2006版规范计算车速和单车噪声源强,距离衰减考虑车流量大小的预测方式得到的预测结果与实测值最为接近。

Comparison among results of road traffic noise prediction models

In order to compare the results of kinds of common traffic noise prediction models, and test the errors between different prediction results and measured noise values, a highway and two urban roads were choosed as examples for analysis, and it was found that 4~9 dB in the daytime and 5~10 dB in the night can occur among different prediction models. The prediction results are more similar to the measured noise values when the speed and the single traffic sound pressure level are calculated by the specification model of Version 2006 with the distance reduction rely on the vehicle volume.