摘要
在一地铁沿线某建有地下连续墙的建筑物的地面及地下室对地铁运行引起的振动进行现场实测,通过所采集到的数据分析了相关测点之间的振动加速度的峰值衰减率、Fourier谱、Hilbert边际谱及振级等的变化,分别讨论了地下连续墙的隔振效果和经过隔振后的振动在墙后地下室各层的衰减情况.结果表明:连续墙对水平方向的振动有较为明显的隔振效果,对垂向未起到隔振作用;随着建筑进入地下深度的增加,地下室水平向的振动衰减程度增大;每一层地下室的垂向振动衰减很明显;地下室3个方向上的振级随着中心频率的增大而增大,随着建筑进入地下深度的增加其水平振级的衰减程度增大.
Field measurements were conducted on the ground and the basement floor of a building with underground continuous wall to investigate the subway-induced vibration. Then, the changes of acceleration peak attenuation rate, Fourier spectrum, Hilbert marginal spectrum and vibration level were analyzed according to the data obtained at the related measuring points. Finally, the vibration isolation effect of the continuous underground wall and the vi- bration attenuation on each floor of the basement wall with vibration isolation were discussed. The results show that the vibration isolation effect of continuous wall is obvious in horizontal direction but is rare in vertical direction, that the degree of horizontal vibration attenuation increases with the depth of underground construction, that the vertical vibration attenuation is obvious on each layer of the basement, that the vibration levels in the three directions all in- crease with the center frequency, and that the attenuation degree of horizontal vibration level increases with the depth of underground construction.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第3期50-62,共13页
Journal of South China University of Technology(Natural Science Edition)
基金
国家"973"计划项目(2011CB013800)
上海市科委科研计划项目(10dz0581800)
关键词
地铁
连续墙
隔振
衰减率
振级
subway
continuous wall
vibration isolation
attenuation rate
vibration level
