摘要
为研究地铁列车经过车辆段咽喉区时对临近建筑物振动影响的特征及传播分布规律,以某地铁车辆段咽喉区临近新建建筑物为研究对象,选取咽喉区线路临近的场地土及建筑物内部的房间作为测试点开展振动测试分析。结果表明:车辆段咽喉区振动影响持时长、强度大、频率特性复杂;咽喉区内的减振垫碎石道床地面线路以低频振动为主,振动主频为12 Hz;咽喉区内的U型槽整体道床线路高频振动多,振动主频为63 Hz。建造隔墙对楼板振动的影响较大,实测其减振量可达5.9 dB以上。建筑楼板的振动强度及分布规律受振源频率及楼板固有频率共同影响,在楼板设计时应避免共振效应。
In order to study the vibration response characteristics and propagation distribution pattern of buildings adjacent to throat area of depot when metro train is passing,a new building near the throat area of certain metro depot is taken as the research object,and site soil and building rooms close to throat area route are chosen as test points to conduct vibration response test analysis.The results show that vibration impact in throat area of metro depot has characteristics of long duration,high intensity and complex frequency.Low-frequency vibration is dominant along route of gravel ballast bed with vibration cushion in throat area,and the main vibration frequency is 12 Hz.High-frequency vibration occurs frequently along U-groove monolithic track bed metro line in throat area,and the main vibration frequency is 63 Hz.Building partition wall has distinct impact on floor vibration,which can reduce vibration up to 5.9 dB according to site measurement.The vibration intensity and distribution pattern of building floor are affected by both vibration source frequency and natural frequency of floor.Resonance effect should be avoided in structural design.
作者
邬玉斌
宋瑞祥
何蕾
吴雅南
刘必灯
WU Yubin;SONG Ruixiang;HE Lei;WU Yanan;LIU Bideng(Beijing Municipal Institute of Labor Protection,100054,Beijing,China)
出处
《城市轨道交通研究》
北大核心
2021年第7期58-62,68,共6页
Urban Mass Transit
基金
北京市自然科学基金资助项目(8192013)
北京市科学技术研究院青年学者项目(YS202102)
北京市科学技术研究院改革发展培育资助项目(PY2020AQ01)。
关键词
地铁
车辆段咽喉区
临近建筑物
振动响应特性
metro
throat area of metro depot
adjacent building
vibration response characteristics
