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以三种结构的高速铁路声屏障为研究对象,测量了高速列车通过有声、无声屏障两种状态下8个测点的声压值,并计算各测点等效连续A计权声压和声屏障的隔声量,结合GB3096-2008中规定的环境噪声限值进行声屏障结构对高速铁路周边居民的声环境影响评价。试验分析结果表明:声屏障不同程度改善了居民的声环境;由于试验所用的三种结构的声屏障隔声量离一般设计要求(20~25dB(A))相差太远,使得高速铁路周边环境噪声高于国家标准规定限值;声屏障结构改进应着力提高中低频噪声的隔声量。
Taking the three types of high-speed railway sound barrier as the research object, the sound pressure values of 8 measuring points of high-speed train passing through both sound and silent barriers were measured and the equivalent continuous A-weighted sound pressure of each measuring point was calculated Barrier sound insulation, combined with GB3096-2008 environmental noise limits for sound barrier structure of high-speed railway surrounding residents of the acoustic environment impact assessment. The experimental results show that the sound barrier improves the sound environment of residents in varying degrees. Since the sound insulation barrier of the three structures used in the experiment is far from the general design requirement (20 ~ 25dB (A)), the ambient noise around high-speed railway Higher than the national standard limit; sound barrier structure improvement should focus on improving the sound insulation volume of low-frequency noise.