摘要
合肥某医学中心建筑质子区内设置众多精密仪器设备,为评估地铁交通对精密设备基础的振动影响,采取工程类比法对邻近地铁线路运行引起的天然场地振动进行现场实测,测试内容为地铁经过时场地的振动速度。通过对现场实测数据的整理分析,探讨了地铁交通引起的场地振动特性及传播规律,并依据国际振动VC标准对医学中心场地选址进行评估。结果表明:1)地铁交通引起场地振动主要为峰值频率为40~60Hz的中高频振动;2)总体而言,地铁引起地面振动水平随测点与地铁距离的增加逐渐衰减;3)本项目距离地铁线路超过50m以外区域满足VC-D标准,以此可作为该医学中心场地的选址依据。
There is a large number of precision equipment in proton zone of the medical center in Hefei.For evaluating the damping effect induced by subway traffic,a field testing using engineering analogy method is carried out to recording the vibration velocity as subway pass.Through the collation of the measured data,the vibration characteristic and propagation law of the site caused by subway traffic is discussed,and the generic Vibration Criterion(VC)are used to evaluate the environmental vibration based on the measured data.The results show that:1)when subway pass,the vibration frequency of each measuring point is obviously enriched at 40~60 Hz,which indicated that the vibration around the site is mainly at a medium and high vibration frequency caused by subway traffic.2)in general,the ground vibration level increases with the increasing of the distance between the measurement point and the tunnel axis;3)the site 50m away from subway meets VC-D,and the conclusion can be used as a basis for site selection of the medical center.
作者
蔡忠祥
杨钦
童园梦
金国栋
岳建勇
范怀伟
CAI Zhongxiang;YANG Qin;TONG Yuanmeng;JIN Guodong;YUE Jianyong;FAN Huaiwei(Shanghai Underground Space Engineering Design&Research Institute,East China Architecture Design&Research Institute Co.,Ltd.,Shanghai 200011,China;Shanghai Engineering Research Center of Safety Control for Facilities Adjacent to Deep Excavations,Shanghai 200011,China;China Construction Eighth Engineering Division Co.,Ltd.,Shanghai 200120,China;College of Civil Engineering,Tongji University,Shanghai 200092,China)
出处
《建筑结构》
CSCD
北大核心
2022年第S01期1105-1110,共6页
Building Structure
关键词
地铁交通
环境振动
精密设备
振动VC标准
振级衰减
subway traffic
environmental vibration
precision equipment
the generic Vibration Criterion
the attenuation of vibration level
