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工程案例|鄭州軌道交通噪音治理(二期工程)|
瀏覽: 發布日期:2021-01-05


項目提出:鄭州市軌道聲屏障二期工程。全場2000多米,總高5m的全封閉結構。
設計要求:
(1)通孔型泡沫鋁,厚度不小于8mm,抗拉強度≥4MPa,斷裂載荷≥140N,NRC≥0.75;
(2)表面進行高溫氟碳噴涂,膜厚≥60μm;
(3)對聲屏障聲學性能進行計算,對安裝節點、結構構件進行深化設計,整體結構需經受住1.5KN/㎡風載荷。
 
方案設計:
(1)利用防撞墻與國標Q235H型鋼鏈接,整體采用金屬吸音板和透明隔音板的組合形式。
(2)使用新型材料通孔型吸聲泡沫鋁組合成吸聲材料與空腔的吸音板形式,最大程度發揮中低頻吸聲特性。
(3)該聲屏障工程在高振動環境下不失效,同時在積水環境中也不喪失吸聲性能。滿足工程維護維修需要。
(4)根據設計要求進行了結構深化設計,并對該工程案例進行了聲學計算、力學計算與風載荷測試。
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