Study On Design And Building Of Ecotype Noise Barriers Of Expressway

With the development of Chinese expressway, communication noise has become one of sources which harm environment. As an economical and effective method, expressway noise barrier is a primary measure used to reduce communication noise. Expressway noise barrier not only can greatly reduce noise, but also can change its shape and type according to various surroundings.According to the design and building methods of various noise barriers home and overseas, He-Huai-Fu expressway noise barrier was designed based on the principle of noise reduction of noise barrier. New ecotype noise barrier was creatively adopted in the design. Measurement results show that the noise barrier can effectively reduce noise. Main content of this paper is concluded as following:(1) Calculation model of insertion loss of noise barrier was set up based on the principle of noise reduction of noise barrier and calculation expressions of insertion loss of noise barrier was deduced.(2) Noise reduction objective, location, height and length were systematically analyzed. Acoustics, structure and landscape designs were discussed and optimized design idea was put forward.(3) According to above calculation and design, noise barrier of He-Huai-Fu expressway was designed. New ecotype noise barrier was creatively adopted in the design. Ecological earth-bank, wire-basket rock crib and concrete noise barriers were adopted.(4) Effects of designed noise barrier were analyzed. Analysis results show that this noise barrier has good noise reduction, ecological and social effects.