Effect Of Noise Reduction On Roads With Low Noise Pavement

With the rapid development of highway transportation industry,there are also more and more vehicles.Urban road system is developing toward the high grade,high speed and elevated three-dimensional direction.As an environmental hazards,people attach more and more importance to the noise pollution.With the speed faster and faster,the pavement noise become the main source of road traffic noise.As a result,reducing the pavement noise made by cars by economic and effective measures is one of the important measures to reduce traffic noise pollution.At the same time,it also has the vital significance for improving people's quality of life.Because many roads are rebuilt now,there is no pavement with low noise when initially laid.With the gradual improvement of people's quality of life,it is imperative to reduce the pavement noise.So the road pavement reconstruction shoule use low noise road pavement as much as possible.This paper has study two different structure of low-noise pavements' noise reduction effect and the results of two kinds of pavement noise reduction effects are analyzed through the test.First of all,according to the mechanism of pavement noise targeted this paper analysises the noise reduction principle of two kinds of pavement;Secondly,this paper introduces the rubber mixture ratio of drainage asphalt pavement and noise reduction this two types of pavement.At the same time,this paper analyzes the factors which can influence the pavement noise reduction effect by standing wave tube method and tire vertical vibration attenuation experiments.Then,introducing several kinds of the methods of testing the pavement's noise at the scene.According to the actual situation,this paper chooses the control through the method to test the displacement of asphalt pavement,noise reduction type rubber asphalt pavement,asphalt pavement and cement concrete pavement noise and compare and study these two kinds of low noise road surface noise reduction effect.Finally,by comparing the new noise reduction effect and the current noise reduction effect,and then getting the damping results of two kinds of pavement noise reduction ability.The scene actual noise of pavement testing mainly includes the following aspects: Testing two kinds of low noise road surface's actual effect of noise reduction,including outside noise level,the car inside and outside noise spectrum characteristics.This test is also carring on the preliminary test and researching on the interior noise.Because the interior noise test involves many professional and it is very complex,this article only only analysises the interior noise attenuation effect through the analysis of the noise spectrum characteristics of the preliminary tests and uses it for evaluat the ride comfort inside the car and at the same time analysising the noise reduction inside and outside the car whether are relevant.Through the research of testing,obtaining than the drainage pavement's noise reduction is better than the type rubber pavement's obviously;By the outside noise test,the noise reduction effect is correlated to the chamber inner absorption coefficient and this indicates that the results of the study has a certain accuracy.Through the interior noise spectrum characteristics of the test,the test of the results associates with outside test result,low-noise pavement attenuation also has certain effects on interior noise.