| 无砟轨道用水泥基吸声板降噪效果评价 |
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| 引用本文： | 曾庆华,徐志胜,吴军,罗运武.无砟轨道用水泥基吸声板降噪效果评价[J].铁道劳动安全卫生与环保,2009,36(3):148-150,155. |
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| 作者姓名： | 曾庆华 徐志胜 吴军 罗运武 |
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| 作者单位： | 中铁二院工程集团有限责任公司环境工程研究院,成都,610031 |
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| 摘 要： | 介绍了无砟轨道用水泥基吸声板工程，并进行了现场测试。在距轨道中心线7．5m处，铺设吸声板后可以降低噪声2．8dB（A），在距轨道中心线30m处，铺设吸声板后可以降噪1．2dB（A）。吸声板在800—4000Hz各频带可降低0．7—6．4dB。结果表明：在铁路边界以内区域降噪效果显著，但在铁路边界以外作用有限。吸声板主要对800Hz以上的中高频噪声有一定的降噪效果。
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| 关 键 词： | 无砟轨道 水泥基 吸声板 噪声 |
Assessment of the Effects on noise Reduction for Cement-based Noise-absorbing Material on Ballastless Track |
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| ZENG Qing-hua,XU Zhi-sheng,WU Jun,LUO Yun-wu.Assessment of the Effects on noise Reduction for Cement-based Noise-absorbing Material on Ballastless Track[J].Railway Occupational Safety Health & Environmental Protection,2009,36(3):148-150,155. |
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| Authors: | ZENG Qing-hua XU Zhi-sheng WU Jun LUO Yun-wu |
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| Institution: | ( China Railway Eryuan Engineering Group Co. Ltd, Environmental Engineering Research Institute, Chengdu 610031, China) |
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| Abstract: | Engineering of cement-based noise-absorbing material on Ballastless Track was introduced, and effects on noise reduction were measured. With the noise-absorbing material, about 2.8 dB（A） and 1.2 dB（A） of noise are cut down for the receiver 7.5 and 30 meters far from the center track, respectively. It can be made a reduction of 0.7 - 6.4 dB at the range of frequency in 800 - 4 000 Hz. It indicates that noise reducing is more outstanding in the area within boundary of the railway than that beyond the boundary of the railway, and that the noise - absorbing material is effective above 800Hz in frequency domain. |
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| Keywords: | ballastless track cement-based noise-absorbing material noise |
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