Acoustic performance of near-rail low-height noise barriers installed on suburban railway bridges
Acoustic performance of near-rail low-height noise barriers installed on suburban railway bridges
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DOI：
10.1007/s11356-022-20074-8
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发表时间：
2022-04
影响因子：
5.8
通讯作者：
Lizhong Song;Kui Gao;Quanmin Liu;Liangtao Zhang;Q. Feng;Wenjie Guo
中科院分区：
文献类型：
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作者：
Lizhong Song;Kui Gao;Quanmin Liu;Liangtao Zhang;Q. Feng;Wenjie Guo
随着市郊铁路高架桥的大规模建设，高架桥沿线沿着的噪声问题越来越突出。传统的垂直声屏障已被广泛用于缓解郊区铁路高架桥沿着的噪音问题。然而，传统的垂直隔音屏障往往会对城市景观产生不利影响，还会遮挡火车司机和乘客的视线。温州市轨道交通S1号线高架桥上拟设置一种近轨式低高度声屏障，以降低噪声对沿着居民的影响。为评价近轨低高度声屏障的声学性能，提出了考虑轮轨噪声、桥梁结构噪声和声屏障噪声的铁路高架桥综合噪声数值计算方法，并通过现场试验进行了验证。在此基础上，建立数值模型，对近轨式低高度声屏障与传统垂直声屏障的声学性能进行了对比分析。讨论了近轨式低高度声屏障的高度和顶部形状对声屏障声学性能的影响。结果表明，近轨式低高度声屏障与传统垂直声屏障均具有良好的声学性能。近轨式低高度声屏障的降噪效果略优于常规垂直声屏障。近轨式低高度声屏障的声学性能逐渐提高，但随着声屏障高度的增加，提高速度逐渐减慢。倒L形和Y形近轨式低高度声屏障的降噪效果均明显优于垂直式低高度声屏障，倒L形近轨式低高度声屏障的降噪效果略优于Y形低高度声屏障。
With the large-scale construction of suburban railway viaducts, the noise problem along the viaducts is becoming more and more prominent. Conventional vertical noise barriers have been widely used to alleviate the noise problem along the suburban railway viaducts. However, conventional vertical noise barriers often have an adverse effect on the urban landscape and also block the view of train drivers and passengers. A type of near-rail low-height noise barrier was planned to install on the viaducts of Wenzhou Rail Transit Line S1 to reduce the impact of noise on residents along the railway lines. To assess the acoustic performance of the near-rail low-height noise barrier, a numerical procedure for railway viaduct comprehensive noise considering wheel-rail noise and structure-borne noise of the bridge and noise barriers was proposed and then verified by a field test. On this basis, numerical models were established to compare the acoustic performances of the near-rail low-height noise barrier and conventional vertical noise barrier. The influences of the height and top shape of the near-rail low-height noise barrier on the acoustic performance were discussed. Based on the numerical analysis results, it is found that both the near-rail low-height noise barrier and conventional vertical noise barrier have good acoustic performances. The noise reduction effect of the near-rail low-height noise barrier is slightly better than that of the conventional vertical noise barrier. The acoustic performance of the near-rail low-height noise barrier gradually improves, but the improvement rate gradually slows down as the height of the noise barrier increases. The noise reduction effects of both the inverted L-shaped and Y-shaped near-rail low-height noise barrier are obviously better than that of the vertical one, while the noise reduction effects of the inverted L-shaped near-rail low-height noise barrier are slightly better than the Y-shaped one.