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.%伴随新建铁路、既有线增建二线、电气化改造等项目的大规模建设,围绕铁路建设、运营由来已久的铁路噪声污染和扰民的问题却更为突出.根据铁路噪声的传播特性,合理地选取了一种噪声预测方法,即模式预测法作为铁路噪声预测方法,并重点介绍了噪声模式法的理论依据、计算公式和边界条件.以我国中西部地区具有代表性的铁路干线之一作为研究对象,分析讨论由于工程规模、线路质量、列车速度、运输组织的变化,引起的铁路噪声对沿线声环境的影响,定量给出了典型区段距铁路外轨中心线30m、60m、120m处的昼夜间等效连续声级值.通过对噪声贡献值与声环境适应性分析,定性描述铁路噪声对周边环境产生的影响,研究成果为进一步有效控制铁路噪声污染、合理划分工程沿线土地利用功能提供有力依据.
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