地铁运行引起的地面振动实测及传播规律分析  

Field Measurement and Analysis of Ground Vibration Induced by Subway Trains

作　　者：楼梦麟[1] 贾旭鹏[1] 俞洁勤[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《防灾减灾工程学报》2009年第3期282-288,共7页Journal of Disaster Prevention and Mitigation Engineering

基　　金：上海市科委基础研究项目(07JC14051)资助

摘　　要：对地铁线路某区间段的地面振动进行实测,采集不同测线和不同测点处的水平方向、竖直方向加速度,并转化为傅里叶幅值谱对其进行衰减规律分析。利用公式将加速度记录换算为振级和分频振级,参照相关的国家标准分析不同距离处的振级和频率成分。对比同一加速度记录中的两对开方向列车引起的地面振动,进一步分析振动衰减的规律。所得到的结果可供地面建筑的隔振减振及城市轨道的规划和设计参考。Obtained in a vibration test on a road section along a subway in Shanghai, the horizontal and vertical accelerations on test lines and at test points are presented in this paper. They have been changed to vibration grades, compared with the national standard, and analyzed the composition of vibration frequencies. The accelerations induced by trains in opposite ways were compared to analyze the regularity of vibration attenuation. The result can provide a reference for the isolation and reduction of vibrations in buildings and the planning and designing of urban rails.

关 键 词：地铁振动 加速度衰减 加速度回升区 振动频率 

分 类 号：U459.3[建筑科学—桥梁与隧道工程] TU435[交通运输工程—道路与铁道工程]