近车站地铁运行引起的环境振动的实验与分析

选取上海地铁交通9号线沿线近车站典型区段为对象,以基于LabVIEW2010开发平台的振动测试系统进行数据采集。根据现场实测数据,分析了地铁运行时隧洞中心线对应的地表处3个方向,以及距中心线不同距离地表处垂直地面方向的振动响应实况和振动特性及传播规律。结果表明,地面振动以垂直地表方向振动为主,振动幅值距离隧洞中心线越远越小,在15m左右存在放大区,且放大的敏感频率为15~25Hz。本次实验地点靠近9号线某车站,实验数值具有一定的典型性和特殊性,可为完善该领域的研究提供借鉴和参考。

Experiments and Analysis on Environmental Vibration of Areas Adjacent to Metro Station

Typical region closed to a station of Shanghai Metro Line 9was selected as research background in this article.The correlative data are collected based on the vibration test system of LabVIEW2010development platform.The response,characteristics and propagation law of vibration caused by train operation are analyzed based on the data collected from the three directions of the ground points corresponding to the metro tunnel central line as well as the vertical direction of the ground points with various distances from the central line.The result shows that the vertical vibration is the main form of ground vibration,and the vibration amplitude tends to decrease with the distance from the central line of the metro tunnel.There is an amplifier region at a distance of 15mfrom the central line.The sensitive frequency is in the range of 15~25Hz. The test area near the station of metro line 9has significant representativeness for the research on environmental vibration under the metro operation.No such research was reported on other metro lines.