DESIGNING POROUS ROAD SURFACES TO REDUCE TRAFFIC NOISE
DESIGNING POROUS ROAD SURFACES TO REDUCE TRAFFIC NOISE
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作者：
P. Nelson
本文描述了车辆在透水性路面上行驶时产生和传播噪声的机理，并回顾了为获得适用于高速道路应用的可行的低噪声透水性路面的设计指南所考虑的因素。结论是，最大集料尺寸为20 mm的多孔性路面铺设厚度为0.05m，并具有优化的粘结剂含量以最大化层中的总空隙体积，将提供显著低于同等无孔热轧沥青(HRA)路面的道路车辆噪音水平。此外，与其他用较小集料制成的透水性路面相比，这种路面设计在抑制喷雾和抗堵塞方面将具有明显的优势。在实践中，已发现铺设20 mm排水性沥青(PA)的道路与同等的无排水性路面上产生的噪音相比，车辆噪音水平降低了5-6分贝(A)。(A)封面摘要见IRRD 869068。
This paper describes the mechanisms governing the generation and propagation of noise from road vehicles running on porous road surfaces and reviews the considerations given to obtain design guidelines for feasible low noise porous road surfaces for high speed road applications. It is concluded that a 20mm maximum aggregate size porous road surface laid to a thickness of 0.05m, and with an optimised binder content to maximise the total void volume in the layer, will provide substantially lower noise levels from road vehicles than equivalent non-porous Hot Rolled Asphalt (HRA) surfaces. In addition, the surface design will provide distinct advantages in terms of spray suppression and resistance to clogging when compared with other designs of porous road surfacing made with smaller aggregates. In practice, roads surfaced with 20mm porous asphalt (PA) have been found to lower vehicle noise levels by 5 - 6 db(A) compared with the noise generated on an equivalent non-porous road surface. (A) For the covering abstract see IRRD 869068.