Road And Bridge Traffic Noise And Its Control Study

With the development of China, basic establishments such as highway, bridge, light rail traffic etc, are blooming, and bring the new blood to country economy. Meanwhile, the development of transportation has brought bad effects to environment and humans' life. The thesis will discuss the problem. But due to the limits of time and energy, the emphases will be focused on the traffic noises.As most people know, traffic noise does much harm to a lot of things. Because it is a kind of sound waves, the thesis has studied the principle of the occurrence and prevalence. And the effects on traffic noises have analyzed thoroughly too.When the noise of vehicles is operated on the bridges, the effect will be different with that of highways owing to the coupling of bridges and vehicles. By analyzing the coupling, the thesis has put forward the ways of forecasting of the noise on bridges.The controlling of traffic noises has two ways in the thesis. First, the sonic source is limited and low-noise bridge deck pavement is suggested to use. Second, the route of spread is controlled and acoustic barrier is set up, especially in the viaduct. The thesis has researched the two problems thoroughly and some guidelines have advanced.