摘要
隧道内部交通噪声经壁面多次反射,混响声、直达声等叠加,声场分布形式复杂、噪声等级高,对司机、乘客、检修人员及隧道口沿线人群造成较大的危害,甚至会损害到隧道内部构件,因此必须进行隧道路面材料降噪功能设计。该文通过分析隧道内声场分布状况,探讨隧道内车辆产生噪声的机理,研究不同路面结构型式吸声性能,提出适合隧道路面的路面结构形式。研究结果表明,开级配沥青磨耗层具有大量的内部连通空隙率,均值吸声系数达到0.402,较其他路面表现出更加的降噪性能。
The traffic noise in tunnels is complicated and serious due to the reflection and superposition of acoustic wave.The acoustic absorption performance of different kinds of pavements was studied in this paper based on the analysis of the generation and distribution of tunnel noise.The results show that： open-graded friction courses whose acoustic absorption coefficient reaches 0.402 because of its connected-pore structure has a better noise-reducing performance than others.
出处
《建材世界》
2011年第2期63-67,101,共5页
The World of Building Materials
基金
重庆交通大学山区道路建设与维护技术重点实验室开放基金(CQMRCM-10-2)
关键词
隧道路面
降噪性能
OGFC
吸声系数
tunnel pavement
noise-reducing performance
OGFC
acoustic absorption coefficient
