沥青路面路表指标对车外噪声的影响研究

Influence Research of Surface Characteristics of Asphalt Pavement on Road Noise

随着城市路网的扩张,道路噪声污染成为城市生活环境的重要污染源,而车辆轮胎与沥青路面接触所产生的车外噪音是道路噪声的重要来源之一。为科学分析轮胎与路面产生的车外噪声机理,探究沥青路面路表指标与车外噪声间的相关影响关系,选取了某市2段单向4车道的高架路段作为试验路,采用滑行法测量试验路段沥青路面的车外噪声,并选取国际平整度指数IRI、构造深度TD、路面抗滑值BPN三个路面路表性能指标,研究上述沥青路面路表指标对车外噪声数值的影响。试验结果表明:1)车外噪声与平整度IRI及构造深度TD均有相关性;2)路面抗滑值对车外噪声没有决定性影响;3)试验路段的平整度IRI在1.52m/km^2.91m/km,构造深度TD在0.47mm^1.68mm的范围时,确定了车外噪声的模型。

With the expansion of urban road network,road noise pollution has increasingly become an important source of urban living environment pollution.Outside vehicle noise caused by the contact between tire and asphalt pavement is one of the important sources of road noise for vehicles on the road.In order to scientifically analyze the mechanism of outside noise generated by tire-road surface,this paper explores the relationship between asphalt pavement surface index and vehicle noise.In this paper,two elevated sections of one-way four-lane road in a city are selected as test roads.By sliding method of outside vehicle noise acquisition,the IRI,TD,BPN were chosen,the effect of surface characteristics of asphalt pavement on road noise is studied.According to the results of test data analysis,outside vehicle noise and IRI and TD are related;tests found the BPN has a no decisive effect on the value of outside vehicle noise;When the IRI is in 1.52~2.91 m/km,TD is in 0.47~1.68 m/km range,the modeling of outside noise is determined.