Research On Acoustical And Landscape Design Of High-speed Railway Noise Barriers

With the growing of Traffic and Transportation business, especially the rapid development of high-speed railway , Urban Railway Transit and freeways in recent years, noise pollution along the railways, highways and Urban Railways has becoming more and more serious, and which disturbed people's life ,study and work and damaged people's health who live around the lines . It has become an urgent problem how to reduce the noise impact on both sides of lines. Under the circumstances that it is difficult to achieve the desired effect of reducing railway noise from the sound source, setting up noise barriers is an important and effective measure to solve the railway noise pollution which is an important part of traffic noise.this paper mainly studied acoustic design (including height, length, materials and structure) and landscape design of the noise barriers .based on research and analysis the characteristics of noise source of high-speed railway, the meaning and characteristics of noise barriers' landscape, some advices which suit the high-speed railway noise barriers design have been worked out to offer references for the noise barriers' acoustic and landscape design of high-speed railway. The main work of this paper is as follows:Firstly, the noise barriers' Principles of Noise Reduction and the calculation theory and methods of insertion loss were systemically discussed.Secondly, researched and developed Simulation forecasting procedures of noise barriers' insertion loss based on GIS, which mainly including the modules of parameter setting, calculation predicting and results showing etc. These procedures can predict noise barriers' insertion loss and show the changes of noise reduction along railway after the setting up of noise barriers.Thirdly, According to high-speed railway and its noise characteristics, the principle to select the location and especially the height designing of the noise barriers were studied; the suggestion of increasing the height of noise barriers properly was proposed according to that high-speed railway added more aerodynamic noise at the upper part of the train compared to general railway; based on analyzing and researching the advantages and limitations of the noise barriers' materials and structure types, the suitable environment for various structure types was received; summed up some optimized noise reduction measures of noise barriers.Fourthly, the characteristics of railway noise barriers' landscape was in-depth analyzed .on the basis of fulfilling specific functional requirements and protecting the ecological environment, the methods of landscape designing of the railway noise barriers were systematically proposed through landscape designing of noise barriers, giving Aesthetic pleasure on vision and reducing the visual impact.