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關鍵詞:城市軌道交通;高架橋;環境振動;環境噪聲;振動衰減
中圖分類號:F259.22;U211.3;TB53 文獻標志碼:A DOI:10.13714/j.cnki.1002-3100.2024.14.018
文章編號:1002-3100(2024)14-0092-07
Research on the Characteristics of Environmental Vibration and Environmental Noise of Metro Elevated Lines and Their Propagation Laws
(1. School of Urban Rail Transit, Shanghai University of Engineering Science, Shanghai 201620, China; 2. Shanghai Composite Material Science amp; Technology Co.,Ltd., Shanghai 201112, China)
Abstract: In order to study the characteristics of environmental vibration and environmental noise of urban rail transit on viaducts, a typical metro elevated line in central residential area has been selected to carry out on-site noise and vibration measurements under normal traffics. The measurements include ground vibration and noise near the viaduct and the noise just outside the buildings, as well as in-car noise and vibration. The spectral characteristics of noise and vibration have been systematically studied to obtain features of attenuation. The results show that the main frequency ranges of rolling noise, noise near the viaduct and noise outside the building are 200~1 250Hz, 20~1 000Hz and 500~1 600Hz, respectively. Rolling noise and viaduct noise radiation are the main noise sources. The main frequency range of in-car vibration is below 1 000 Hz; low frequency noise and vibration near the viaduct decrease exponentially with the increase of distance. The results may provide some reference to evaluate the noise and vibration control for metro lines on viaducts.
Key words: urban rail transit; viaduct; environmental vibration; environmental noise; vibration attenuation
0 引 言
隨著城市現代化的快速發展,高架橋周圍的建筑物也越來越多,不斷增長的地鐵建設需求與居民生活質量之間存在矛盾。地鐵引起的環境噪聲和振動對周邊地區居民的日常生活造成了干擾[1-3]。
國內外學者從理論分析和現場實測兩方面對地鐵引起的噪聲和振動進行了大量研究。Sanayei等[4]研究發現,地面和建筑物的峰值振動水平通常在20 ~ 60 Hz頻率范圍內,地鐵振動的低頻影響引起了更多的關注。……