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軌道交通噪聲控製



噪聲問題


城市軌道交通按產生噪聲的聲源可分為輪軌噪聲、車輛非動力噪聲、牽引動力係統噪聲、高架軌道噪聲、地下鐵道的地麵承載噪聲及客運站人群噪聲等。解決城市軌道交通噪聲問題是一個綜合的係統工程。

地鐵通風空調係統聲源設備主要由隧道送/排風機(TVF)、排熱風機(TEF)、隧道射流風機、回/排風機、新風機、組合空調機、送/排風風機、室外冷卻塔、列車噪聲等。


解決方案


利用聲屏障來降低噪聲對噪聲敏感點局部環境汙染。

根據聲源的頻譜特性在其前後配置合理的管道式消聲器、金屬外殼式消聲器、結構式消聲器作為消聲降噪的措施。其中冷卻塔因安裝的環境多樣化可以根據安裝環境不同采取不同的綜合治理的措施。通過合理的噪聲治理手段,可以達到以投入最低的成本獲得最大的降噪效果。



Noise problems

    The noise resulted from urban rail transit system can be classified into wheeltrack noise, vehicle non-power noise , traction power system noise, elevated rail noise, ground bearing noise of underground railway and of passenger station’s population noise in terms of its sources. To solve the urban rail transit  noise problems is a comprehensive engineering system.
    The noise of the metro ventilation & air-conditioning system is mainly resulted from tunnel blower/exhaust fan (TVF), hot air exhaust blower fan (TEF), tunnel jet fan, return/exhaust fan, fresh air fan, combination air conditioner, air supply/discharge fan, outdoor cooling tower and train.


Solutions

    The acoustic shield can be used to reduce the noise pollution for the local environment sensitive to noise.
    According to the spectral characteristic of the noise source, the tube-type muffler, metal-enclosure muffler, structural-type muffler can be equipped before and after the noise reduction devices. The cooling tower, due to diversified installation environment, can be addressed using corresponding noise control measures. Through reasonable noise control means, an optimum noise reduction result can be achieved at minimum cost.


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