摘要
采用Midas GTS软件建立三维轨道—隧道—土体结构的有限元模型,用移动荷载模拟地铁列车运行,研究了石家庄地铁1号线北宋站至谈固区间的列车振动传播规律,对其进行一定程度的振动预测,评价其对建筑物造成的影响。结果表明:(1)单双线运行对岩土及周围建筑物振动影响区别不大。(2)地铁振动传播主要以垂直方向为主,该方向上传播衰减较快,加速度变化程度最大。(3)列车无论单双线运行时,附近地面建筑物处产生的最大噪声均大于我国标准要求的65dB,建议采取一定措施减振降噪。
A 3-dimensional finite element model for the track-tunnel-soil structure is established by means of the Midas GTS software in the paper, with the moving load adopted to simulate the operation of Metro Trains, upon the basis of which the transmission law of the vibration of the train running in the section between the Beisong Station and the Tangu Station of Line One of Shijiazhuang Metro is studied. In the meanwhile,the vibration of the train there is predicted to a certain extent, with the effect of the vibration on the surrounding buildings evaluated. The result shows that：（1） the effects of the operation of the trains on the single-track and double-track railways on the vibration of rock and soil and the surrounding buildings are found to be not quite different;（2） the subway vibration transmits mainly in the vertical direction,and the transmission attenuation in this direction is quite quick, with the change in the vibration transmission being the maximum when the train is accelerated;（3）Either the single-track or the double-track railway is in operation, the maximum number of noise generated at the surrounding ground buildings is larger than that of the standard 65dB. It is highly advisable that certain measures be taken to reduce the vibration and noise.
出处
《国防交通工程与技术》
2017年第3期16-19,共4页
Traffic Engineering and Technology for National Defence
关键词
地铁振动
振动预测
减振降噪
MidasGTS
vibration of the subway train
vibration prediction
vibration reduction and noise reduction
Midas GTS
