新建铁路邻近既有铁路的声屏障降噪效果研究
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摘要
以某既有铁路及新建铁路并行穿越某居民区为例,对该区域的交通噪声现状进行监测分析,表明环境噪声受铁路噪声影响较大,对于临街建筑的影响为从低楼层至高楼层呈逐渐增大的趋势。考虑既有铁路和新建铁路的共同影响,建立了Cadna/A噪声预测模型,预测了采用声屏障降噪措施前后区域的环境噪声空间分布特征。结果表明,设置声屏障措施能有效减少铁路噪声的影响,预测点昼间均能达标,夜间达标率为50%,但超标点位的预测值基本相当或优于现状值。
The traffic noise of a residential area, where an existing railway and a new railway would parallelly run through, has been tested and the spatial distribution characteristics of the traffic noise had been analyzed. The results showed that the traffic noise was mainly caused by railway transportation, and it increased gradually from the lower floors to the high floors on architectures nearby the railway track. Considering the combined impact from the existing railway and the new railway, a Cadna/A noise calculation prediction model was established to predict and analyze the spatial distribution characteristics of the regional noise before and after taking the sound barrier reduction measures. It showed that the sound barriers could effectively reduce the impact of railway noise, which all predictable points could meet the environmental requirements in day-time. The night-time compliance rate is 50%, but the predicted results of those over-standard points were basically equal or better than current level.
The traffic noise of a residential area, where an existing railway and a new railway would parallelly run through, has been tested and the spatial distribution characteristics of the traffic noise had been analyzed. The results showed that the traffic noise was mainly caused by railway transportation, and it increased gradually from the lower floors to the high floors on architectures nearby the railway track. Considering the combined impact from the existing railway and the new railway, a Cadna/A noise calculation prediction model was established to predict and analyze the spatial distribution characteristics of the regional noise before and after taking the sound barrier reduction measures. It showed that the sound barriers could effectively reduce the impact of railway noise, which all predictable points could meet the environmental requirements in day-time. The night-time compliance rate is 50%, but the predicted results of those over-standard points were basically equal or better than current level.
引文
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[8] 郑庆锋,徐卫忠,陈春根.Cadna/A软件在评价地面高架综合交通噪声对居住小区影响的应用[J].噪声与振动控制,2011,31(6):147-151.
[9] 徐志胜.Cadna/A软件在高速铁路声环境影响评价中的应用[J].环境工程技术学报,2011,1(6):517-525.
[10] 刘畅荣,王志勇,汪婷婷.基于Cadna/A软件的某高层建筑交通噪声预测评价研究[J].中外建筑,2016(9):85-86.
[11] 古丽君. 成昆铁路峨眉至米易段扩能工程声屏障的声学设计及优化[D].成都:西南交通大学,2016.
[2] 王亚平,盖磊.城市高架复合道路交通噪声垂直面声场研究[J].噪声与振动控制,2012,32(5):136-140.
[3] 谢海涛.基于Cadna/A软件的城市交通十字路口噪声预测研究[J].四川环境,2014,33(1):124-127.
[4] Huang B X, Pan Z K, Liu Z R, Hou G J, Yang H. Acoustic amenity analysis for high-rise building along urban expressway: Modeling traffic noise vertical propagation using neural networks[J]. Transportation Research Part D,2017,53: 63-77.
[5] 高山.城市道路下穿隧道噪声传播特性及防治措施效果研究[J].四川环境,2017,36(6):134-140.
[6] Munteanu C, Mihaela M L, Tma D R, Cob?rzan N, Chiuzbaian R, Fernea R. Protection to railway traffic noise in the case of a multilevel residential building from the city of Cluj-Napoca[J]. Procedia Manufacturing,2018,22: 339-346.
[7] DEFRANCE J,JEAN P. Integration of the efficiency of noise barrier caps in a 3D ray tracing method: case of a T-shaped diffracting device[J]. Applied Acoustics, 2003, 64(8): 765-780.
[8] 郑庆锋,徐卫忠,陈春根.Cadna/A软件在评价地面高架综合交通噪声对居住小区影响的应用[J].噪声与振动控制,2011,31(6):147-151.
[9] 徐志胜.Cadna/A软件在高速铁路声环境影响评价中的应用[J].环境工程技术学报,2011,1(6):517-525.
[10] 刘畅荣,王志勇,汪婷婷.基于Cadna/A软件的某高层建筑交通噪声预测评价研究[J].中外建筑,2016(9):85-86.
[11] 古丽君. 成昆铁路峨眉至米易段扩能工程声屏障的声学设计及优化[D].成都:西南交通大学,2016.