摘要
为了解济南地区地铁运营产生的环境振动特性,分别在地铁车站、区间地面及邻近建筑物不同位置处设置测点,全面测试地铁2号线运行引起的环境振动情况,分析不同测点振动响应的时频特征,探讨地铁环境振动在地面及不同结构物中的传播规律。研究表明:随与地铁隧道距离的增加,环境振动周期性逐渐减弱,地铁车站、区间地面及邻近建筑物内振动水平分布介于0.09 mm/s~0.72 mm/s、0.11 mm/s~0.64 mm/s以及0.07 mm/s~0.15 mm/s之间;地铁车站和邻近建筑物内振动频率成分较区间地面更为丰富,体现土体的材料阻尼和结构物激发中高频振动的作用。不同场地及建筑物内振动传播规律不同,建筑物基础和底板起到隔振减振作用。研究成果使现有地铁环境振动实测结果数据得到进一步充实,可为类似地层数值计算提供验证。
To better understand the properties of subway-induced environmental vibration in Jinan City,a comprehensive in-situ vibration measurement was conducted along Metro Line 2,with the observation points covering metro stations,ground surface and adjacent buildings.Vibration characteristics are analyzed in the time and frequency domains separately,and the vibration transmission behavior induced by trains is investigated in different locations of the ground surface and the super-and sub-structures.Research results show that,with the increase of the distance away from the subway tunnel,the periodicity of the train-induced environmental vibration is weakened gradually,the peak values of vibration velocity measured in the metro station,ground surface and adjacent building are located between 0.09 mm/s and 0.72 mm/s,0.11 mm/s and 0.64 mm/s,and 0.07 mm/s and 0.15 mm/s respectively.Vibrations in the metro station and the adjacent building have wider frequency distribution than that in the ground surface,which implies the damping effect of soil materials and the effect of the excited higher frequency vibration of the structure.The vibration transmission and attenuation behavior in different sites or buildings are different,and the building foundation and its baseplate can isolate some environmental vibration.The results of the research have enriched the existing data of in-situ measurement of subway-induced environmental vibration,and can provide a verification for the numerical calculation in similar strata.
作者
魏焕卫
刘亚珍
陈娟
罗威
孔令坤
WEI Huanwei;LIU Yazhen;CHEN Juan;LUO Wei;KONG Lingkun(College of Civil Engineering,Shandong Jianzhu University,Jinan 250101,China;Key Laboratory of Building Structural Retrofittingand Underground Space Engineering Ministry of Education,Shandong Jianzhu University,Jinan 250101,China;Subway Protection Research Institute,Shandong Jianzhu University,Jinan 250101,China;Jinan Rail Transit Group Co.,Jinan 250000,China)
出处
《噪声与振动控制》
CSCD
北大核心
2023年第2期222-229,共8页
Noise and Vibration Control
基金
山东省自然科学基金青年资助项目(ZR2020QE264)
山东省高等学校“青创科技计划”资助项目(2019KJG015)
济南轨道交通集团横向科研资助项目(HX2020-B08)。
关键词
环境振动
济南地铁
现场实测
地铁车站
邻近建筑物
振动传播
environmental vibration
Jinan metro
in-situ measurement
subway station
adjacent building
vibration transmission
