影响高速公路交通噪声预测关键参数

Key Influencing Parameters for Traffic Noise Prediction of Highways

交通量、车型比和车速是影响高速公路交通噪声预测的关键参数。基于对四川某典型高速公路交通量、车型比和车速的实际调查,采用《环境影响评价技术导则声环境》(HJ 2.4-2009)推荐的模式预测了不同监测点处的交通噪声值,并与实测噪声值进行比较,得出以下结论:1)采用设计车速或实际车速预测的噪声值与实测值较吻合;2)选用实际车速并将整条高速公路视为一个整体较其它分幅方案的计算结果与实测值更接近;3)选用夜间车型比沿用昼间车型比预测的夜间交通噪声值更为准确。

Vehicle flow flux, vehicle type ratio and vehicle speed are key parameters for traffic noise predication.Based on the investigation of a typical highway in Sichuan province, road traffic noises in different monitoring areas were predicted adopting the method recommended by the＂Technical Guidelines for Noise Impact Assessment（HJ 2.4- 2009）＂.Through the mutual comparison between the predicted values and the actual monitoring ones, it can be concluded that（1）the traffic noise predicted by using either design speed or actual speed is close to the measured traffic noise;（2） the result choosing the measured speed and taking the entire highway as a whole can forecast the traffic noise better than the other lanegroup strategies;（3） the result using the vehicle-type-ratio measured at night can predict the night traffic noise more accurately than that employing the vehicle-type-ratio measured in the daytime.