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为降低微表处交通噪声,增加行车舒适性,通过4条高速、2条城市道路2 a内不同时间施工的微表处噪声进行调查,从原材料、级配、设计、施工、路面纹理结构及其与轮胎宏观构造波长关系、胎/面接触等方面进行了研究。研究表明:微表处车内噪声随使用时间延长而降低,随车速增加、构造深度减小而增强;车外噪声则随时间延长、车速增加而增强,随构造深度增加而减小;通过增加7 mm筛孔及其支撑点集料含量,建立了微表处多支点降噪模型及其降噪判据,提出了低噪声微表处级配,使微表处表面的路表构造波长由传统级配的17 mm缩短到10 mm,车内、车外噪声平均降低3～4 dB。
In order to reduce the traffic noise at the micro-surfacing station and increase the driving comfort, the noise at the micro-surfacing site constructed at different time within 2 years in 2 high-speed and 2 urban roads was investigated. From the aspects of raw material, gradation, design, construction, pavement texture Its relationship with the macro structure of the tire wavelength, tire / surface contact and other aspects were studied. The results show that the noise in the interior of the micro-surfacing station decreases with the increase of the service time. With the increase of the vehicle speed, the tectonic depth decreases and increases. The exterior noise increases with the increase of the vehicle speed and decreases with the increase of the tectonic depth. 7 mm sieve hole and its supporting point aggregate content, a multi-pivot noise reduction model of micro-surfacing and its noise reduction criterion were established, and the gradation of low-noise micro-surfacing was proposed so that the wavelength of the road surface structure of the micro- The traditional gradation of 17 mm is shortened to 10 mm, reducing the noise inside and outside the car by an average of 3 to 4 dB.