A Study of Noise Reducing by Reform on Road Surface for Concrete Pavement

为降低路面噪声，对混凝土路面，特别是裸露骨料混凝土路面，研究了路面表面形状与轮胎/路面噪声的关系。采用重整路面的方法，通过裸露粗集料的最大尺寸来改变路面的纵断面。本研究通过改变集料尺寸来评价路面的形状，并考察了充气噪声和轮胎振动噪声对轮胎路面噪声的影响。用滚筒式测量装置对环氧树脂粘结集料试件进行了轮胎振动噪声的测量。接下来，利用轮胎落锤式测量装置对路面混凝土和沥青材料试件进行了抽气噪声的测量。可以使用频率分布…来评估由使用的集料尺寸改变的道路纵断面更多的离子的道路深度。采用滚筒式噪声测量装置，轮胎振动引起的轮胎/路面噪声随骨料尺寸增大而增大，轮胎/路面噪声随车速增加而增大。存在轮胎振动噪声随车速增大而增大的路面凸段。当集料尺寸变大时，轮胎/道路噪声通过减少抽气噪声而降低，这是因为路面上的间隙导致落体式噪声测量装置产生2 kHz或更大的频率。从集料尺寸来看，集料尺寸越小，轮胎的振动噪声越小，集料尺寸越大，轮胎的抽气噪声越小。因此，通过考察轮胎振动噪声要素与抽气噪声要素作为轮胎/路面实际运行噪声要素的比例，得出了最佳集料尺寸。较少

The present study has been carried out to investigate the relationship between the surface profile of road and tire/road noise for concrete pavement, particularly concrete pavement with exposed aggregate, for reducing noise. A method for reforming road surface is adopted to change profile by maximum size of exposed coarse aggregate. This study was performed to evaluate the road profile by changing aggregate size and to examine the influence on the tire road noise where consists of the air pumping noise and the tire-vibrating noise. The measurement of the tire-vibrating noise was executed with a measurement device of the drum type to the examination road specimen bound aggregate with epoxy resin. Next, the measurement of the air pumping noise used a measurement device of the tire fall type, to examination road specimen of concrete and asphalt materials.This study clarified the following.1. The road profile changing by used aggregate size can be evaluated by using the frequency distribut … More ion of the road depth.2. The tire/road noise by the tire-vibration increases when aggregate size increases, and furthermore the amount of the tire/road noise increases when the speed increases, with the drum type noise measurement device. The convex part interval of the road where the tire-vibration noise is led to an increase for the speed exists.3. When it makes aggregate size large, the tire/road noise decreases by reducing the air pumping noise because the gap on the road surface causes, being generated by 2kHz or more, with the fall type noise measurement device. Moreover, best aggregate size exists being reduce the air pumping noise.From the above-mentioned, as for aggregate size, it is that aggregate size being small decreases the tire vibrating noise and aggregate size being large decrease the air pumping noise. Therefore, it is considered that optimum aggregate size is obtained by examining the ratio of the element on tire-vibrating noise and the element on air pumping noise as an element of the tire/road noise when really running. Less