摘要
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。
To reduce micro-surfacing noise, improve riding comfort, first, the micro-surfacing noise of four highways and two urban roads constructed in two years were surveyed. Then, the influencing factors such as material, gradation, design, construction, texture structure of pavement, relation between texture and vibration mechanical wavelength of the tyre, and contact of tyre/pavement were researched. It shows that （ 1 ） vehicle interior noise from micro-surfacing reduces with increasing of service time, and it increases with vehicle speed increases and texture depth reduces; （2） vehicle exterior noise increases with service time and vehicle speed increases, and it reduces with texture depth increases. The multi-support denoising model of micro-surfacing and denoising criteria were established, and denoising micro-surfacing gradation was recommended. By increasing the 7 mm sieve pores and content of the aggregate at supports, the texture wavelength of micro-surfacing was reduced to 10 mm from conventional 17 mm, thus, the vehicle interior noise and vehicle exterior noise from micro-surfacing could be reduced 3 -4 dB.
出处
《公路交通科技》
CAS
CSCD
北大核心
2012年第1期1-10,共10页
Journal of Highway and Transportation Research and Development
基金
国家自然科学基金项目(51008075)
河南省交通科技项目(2008P242)
关键词
道路工程
微表处
多支点降噪模型
车内噪声
车外噪声
预防性养护
road engineering
micro-surfacing
multi-support denoising model
vehicle interior noise
vehicle exterior noise
preventive maintenance
