地铁邻近超高层建筑振动响应及减振降噪研究  

Research on vibration reaction and noise reduction for a super high⁃rise building near subway

作　　者：李伟科 林治平 黄俊光 毕俊伟 李长江 邱艳萍 LI Weike;LIN Zhiping;HUANG Junguang;BI Junwei;LI Changjiang;QIU Yanping(Guangzhou Design Institute Group Co.,Ltd,Guangzhou 510620,China;School of Civil Engineering&Transportation,South China University of Technology,Guangzhou 510641,China)

机构地区：[1]广州市设计院集团有限公司,广州510620 [2]华南理工大学土木与交通学院,广州510641

出　　处：《建筑结构》2024年第5期58-63,共6页Building Structure

摘　　要：地铁运行引起的邻近建筑振动和二次辐射噪声对人们生活和工作有重要影响。以某邻近地铁拟建超高层建筑为背景,利用MIDAS GTS NX建立隧道-土体-建筑物的3维有限元数值模型,分析地铁荷载下建筑物各楼层的竖向振动和二次辐射噪声特性,结合建筑基坑围护结构提出地下连续墙加深+嵌固段外贴橡胶层、肥槽回填减振耗能材料、基底铺设PVC减振垫层的组合措施,并研究其减振降噪特性。结果表明:建筑各楼层的振动和二次辐射噪声呈现“两端大、中间小”的分布趋势。组合措施能有效减小地铁邻近建筑物的振动,对50Hz以上振动的减振效果更为显著。采用组合措施能明显降低建筑物各楼层的二次辐射噪声级。The vibration and secondary radiation noise induced by subway’s operation have significant influences on people’s work and life.Based on one super high-rise building next to subway,three dimensional numerical models of the tunnel-soil-building system were established through MIDAS GTS NX to research the characteristics of the building’s vibration and secondary radiation noise.Considering the pit support structure,the combined measure of vibration and noise reduction has been proposed,which includes the deepened underground diaphragm wall with rubber layer outside the fixed section,fertilizer trough backfilled with damping materials,and PVC damping cushion beneath the building’s foundation.The mitigation performances were also discussed.The results show that the vibration and secondary radiation noise of the building vary with a trend of‘large at high and low floors,small in the middle ones’.The proposed combined measure could mitigate the vibrations evidently,especially for those over 50Hz.The combined measure could obviously reduce the secondary radiation noise of each floor for the building.

关 键 词：地铁运行 超高层建筑 振动 二次辐射噪声 减振降噪 

分 类 号：TU435[建筑科学—岩土工程]