Abstract:With the rapid development of expressways and urban elevated roads in China, the problem of traffic noise pollution is becoming increasingly serious. How to reduce the noise pollution has become one of the urgent problems to be solved. In recent years, the application of sound barriers as noise reduction facilities for elevated roads has become widespread.Not only do they have the good landscape effects, but also the superior noise reduction performance has been tested by many engineering practices. But as time goes by and extreme weather occurs frequently, many diseases have also appeared in the sound barrier. Taking the sound barrier of Wuxi Airport Road Viaduct as an example, the causes of diseases are analyzed. And combined with the structural recheck and calculation, the corresponding reinforcement measures and optimization suggestions are proposed.