沥青路面表面特性对降噪的影响研究

发布时间：2018-07-05 01:30

本文选题：降噪 + 沥青路面　；参考：《重庆交通大学》2015年硕士论文

【摘要】：随着公路建设的迅猛发展,交通工具也逐年增多。截至2013年底,中国公路总里程已达435.62万公里,而中国民用汽车拥有量已达12 670.14万辆。这给经济发展带来了很大的促进作用,但随之而来的交通噪声越来越成为一个严重的问题。因此,如何通过路面表面构造的合理设计来降低道路交通噪声,便成为行业内比较关注的问题。本文在搜集国内外降噪沥青路面相关资料的前提下,从沥青路面表面特性这一角度出发,研究何种指标对降噪有最直接的影响,供路面的降噪设计参考。本文首先通过理论分析得出典型沥青路面的降噪性能优劣(OGFC路面超薄磨耗层NovachipSMA路面普通密级配沥青混凝土路面),为后续的室内试验提供理论依据。再通过传统轮胎-路面噪声检测方法与驻波比法试验的对比,初步得出驻波比法试验可以反映路面表面状况与噪声之间的关系。通过4种典型沥青路面混合料(AC-13C、SMA-13、Novachip-10、OGFC-13)的驻波比试验,进一步分析了驻波比法测试噪声的可行性。最后针对SMA-13的吸声系数反常情况以及薄层抗滑层路面的驻波比法试验分析,得出了驻波比法试验仅能反映路面表面特性对降噪的影响,而无法反映路面结构强度对降噪的影响。在以上研究基础上,着重对沥青路面表面特性相关指标与吸声系数的关系进行分析,得出沥青路面构造深度与噪音强度有较强的相关性,即构造深度与吸声系数均值的拟合关系为:y=0.1014x+0.0725。并可得出结论:从沥青路面表面特性这一角度来看,构造深度的大小对于降噪确有着最直接的影响。由此可见,进行混合料配合比设计时,若考虑降噪因素,可进行驻波比试验进行参考,但须是在沥青混合料结构强度相差不大情况下;从降噪角度出发设计路面时,在各项指标允许范围内,应适当加大路面的构造深度,或者通过各项措施减小路面的结构的刚度(如加大油石比、掺入纤维稳定剂或采用橡胶沥青等)。
[Abstract]:With the rapid development of highway construction, vehicles are increasing year by year. By the end of 2013, China had 4.3562 million kilometers of roads and 126.7014 million civilian vehicles. This has greatly promoted economic development, but traffic noise has become a serious problem. Therefore, how to reduce the road traffic noise through the reasonable design of the pavement surface structure has become a more concerned problem in the industry. In this paper, on the premise of collecting relevant data of noise reduction asphalt pavement at home and abroad, from the point of view of surface characteristics of asphalt pavement, this paper studies which index has the most direct influence on noise reduction, which can be used as a reference for the design of road surface noise reduction. In this paper, the noise reduction performance of typical asphalt pavement (ordinary dense gradation asphalt concrete pavement of NovachipSMA pavement) is obtained by theoretical analysis, which provides a theoretical basis for subsequent laboratory tests. Through the comparison between the traditional tire and road noise detection method and the standing wave ratio test, it is preliminarily concluded that the standing wave ratio test can reflect the relationship between the pavement surface condition and the noise. Based on the standing wave ratio test of four typical asphalt pavement mixtures (AC-13C SMA-13 Novachip-10 OGFC-13), the feasibility of noise measurement by standing wave ratio method is further analyzed. Finally, aiming at the abnormal sound absorption coefficient of SMA-13 and the standing wave ratio test of thin layer pavement, it is concluded that the standing wave ratio test can only reflect the influence of pavement surface characteristics on noise reduction, but can not reflect the influence of pavement structure strength on noise reduction. On the basis of the above research, the relationship between the surface characteristics of asphalt pavement and the sound absorption coefficient is analyzed, and it is concluded that there is a strong correlation between the structure depth and the noise intensity of the asphalt pavement. The fitting relation between the depth of structure and the mean value of sound absorption coefficient is 0. 1014x 0.0725. From the point of view of the surface characteristics of asphalt pavement, it can be concluded that the depth of structure has the most direct effect on noise reduction. It can be seen from this that if noise reduction factor is taken into account in mixture mix ratio design, standing wave ratio test can be used for reference, but if the structural strength of asphalt mixture is not different, when designing road surface from the angle of noise reduction, The structural depth of pavement should be increased properly within the scope of each index, or the stiffness of pavement structure should be reduced by various measures (such as increasing the ratio of oil to stone, adding fiber stabilizer or rubber asphalt etc.).
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.217

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