摘要
高速铁路引入城区时,不可避免地对沿线的声环境敏感点尤其是高层住宅造成影响。为掌握高速铁路对高层住宅的噪声影响特点,指导工程设计采取可行的降噪措施,基于Cadna/A软件,建立西延高铁与某处声环境敏感点的噪声影响预测模型,以距离铁路20 m处的高层住宅为重点研究对象,预测西延高铁运营对该高层住宅的噪声影响,分别模拟3,10 m高直立式声屏障和半封闭声屏障的降噪效果。结果表明:在一定工况条件下,路基轨面以上5.5 m处,铁路噪声影响达到最大;3 m高直立式声屏障对敏感点地面至轨面以上2.5 m降噪效果明显,10 m高声屏障对高于轨面29.5 m的楼层降噪效果有限,半封闭声屏障对各层降噪效果明显,采取半封闭声屏障可确保该高层住宅噪声影响达标。
The high-speed railway passing through urban area will inevitably affect noise sensitive targets along the way,especially high-rise residences.In order to grasp the characteristics of noise impact of high-speed railways on high-rise residences,this paper establishes a noise impact prediction model for the high-speed railway from Xi’an to Yan’an and one noise sensitive target based on Cadna/A to help formulating feasible noise reduction measures in the design.The high-rise residence 20 meters away from this railway is taken as the key research object to predict the noise impact of the high-speed railway operation on the building.The noise reduction effect of the semi-closed and vertical barriers of 3 meters and 10 meters height respectively are simulated based on Cadna/A.The results show that under certain operating conditions,the high-speed railway has the greatest noise effect 5.5 meters above subgrade rail surface.The 3-meter vertical barrier is significantly effective to reduce the railway noise from ground to 2.5 meters above rail surface.The noise reduction effect on floors 29.5 meters high above rail surface is limited with 10-meter high barrier.The semi-closed sound barrier has obvious noise reduction effect on each floor and can ensure the compliance of noise reduction of the high-rise residence with the standard.
作者
杨忠平
YANG Zhongping(China Railway First Survey and Design Institute Group Co.,Ltd.,Xi'an 710043,China)
出处
《铁道标准设计》
北大核心
2020年第10期153-156,共4页
Railway Standard Design
基金
中铁第一勘察设计院集团有限公司科技研究开发计划项目(院科11-62)。
关键词
高速铁路
Cadna/A
高层住宅
声屏障
降噪效果
high speed railway
high-rise residence
Cadna/A
noise barrier
noise reduction effect
