【摘要】 随着人们对铁路噪声关注程度的增加,如何有效地设置铁路声屏障,使其更好地发挥降噪效果已经成为一个亟待研究的课题。从分析声屏障的降噪原理出发,研究声屏障的高度、位置、敷设的吸声材料和结构型式等对铁路环境噪声降噪效果的影响。通过分析得出:在尽量靠近声源处设置声屏障,增加声屏障的高度,在声屏障内侧敷设吸声材料,以及采用更有效的声屏障结构型式等措施,都将有利于取得更好的降噪效果。最后,结合实际工程案例,介绍声屏障的具体设计步骤及方法。更多还原

【Abstract】 Recently,people pay more attention to the railway noise.How to install the sound barrier effectively so as to make the noise reduction more effective has become an urgent research topic.Starting with the analysis of the noise reduction principle,this paper studied the influence of railway sound barrier on environmental noise reduction effect in the four aspects: height,position,sound absorbing material,and structure type of the sound barrier.Then the following conclusions were made:(1) the sound barrier should be installed as close to the noise sources as possible,(2) the height of the sound barrier should be increased,(3) the sound absorbing material should be plastered in the inner side of the barrier,and(4) more effective structure pattern should be chosen.Finally,steps and methods of design of the sound barrier were introduced.更多还原