Study on prediction of railway noise by mode prediction method

With the development of new railways,adding the second line and large-scale electrification reform project construction,railway noise pollution and disturb residents problem due to railway construction and business have becoming more and more serious.A prediction method of noise,which was mode method,was elected for railway noise evaluation reasonably in term of propagation characteristics of railway noise.Theory and calculation formulas and boundary conditions of noise predictive methods of mode were emphasized.One of representative of railway lines of China's central and western regions was deemed to be the research object,and the effects of scale of engineering,quality of line,train speed,and change of transportation organization on noise level along railways were analyzed and discussed.Day and night Equivalent Continuous Sound Level of typical section from the outer rail center line of 30m,60m,120m were supplied quantitatively.After analyzing noise contribution value and sound environment adaptability,the impacts of railway noise on surrounding environment were described qualitatively.The research results could offer useful evidences for controlling railway noise impacting environment and scientific advices on dividing the land utilization function zone along the railway engineering.