既有地铁轨道噪声过大的原因分析及对策  

Cause Analysis and Countermeasures of Excessive Noise in Existing Metro Track

作　　者：朱万旭[1,2] 张瑞东 刘玮 张庆 周红梅[1,4] 

机构地区：[1]广西科技大学土木工程学院,广西柳州545006 [2]桂林理工大学土木工程学院,广西桂林541004 [3]中铁工程设计咨询集团有限公司轨道工程设计研究院,北京100055 [4]柳州汉西鸣建材发展有限公司,广西柳州545006

出　　处：《铁道建筑》2018年第2期138-141,共4页Railway Engineering

基　　金：广西省科技攻关项目(桂科攻1598007-5);广西科技大学硕士研究生创新项目(GKYC201710)

摘　　要：针对一地铁线路在运行过程中噪声过大的问题进行勘查,发现该线路原有的减振降噪设施安装不当,且部分老化失效,从而产生了额外的振动噪声,需增加吸声降噪设施来减少地铁噪声。提出在轨道中间设置吸声板+轨道两侧安装吸声矮墙的组合降噪方案,吸声板和吸声矮墙均由吸声性能良好的陶粒混凝土模压制成。分析了该方案的降噪原理,并对其降噪效果进行了预测计算,降噪量可达10~12 dB,降噪效果良好。A metro line has a problem of excessive noise during its operation course. Through exploring the line, it was found that the original noise reduction facilities of this line were installed improperly,and some of them were aging failure, leading to excessive vibration noise. Therefore,additional facilities for sound absorption and noise reduction were needed to reduce metro noise. The paper proposed the combining schem of installing sound absorption boards between the tracks and low-height soundproof walls on two sides of the tracks. Both of the boards and the walls were modeled by ceramsite concrete with good sound absorption property. The noise reduction theory of this combining schem was analyzed,and its noise reduction capability was forceasting calculated. The quantity of noise reduction can reache 10~12 dB,and the effect is good.

关 键 词：地铁 降噪 现场测试 预测计算 陶粒混凝土 吸声板 吸声矮墙 

分 类 号：TU112.59[建筑科学—建筑理论]