上海地铁一号线人民广场振动测试与分析

Vibration Test and Analysis at the People’s Square of Shanghai，Metro Line 1

摘要:

对上海地铁一号线人民广场站区间隧道进行振动测试，结合轨道加速度测试数据及车辆体系振动方程，建立地铁列车振动模拟荷载的数定表达式，并将荷载作用于FLAC3D数值模型上，分析地铁引起的地面振动响应。通过对比不同工况的数值分析结果，研究振动波在地表的传播规律，并讨论了隧道埋深对地面振动的影响，分析了不同频率的简谐地铁激励荷载引起的地面振动的衰减规律。

Abstract:

A field test was performed in the subway tunnel of metro Line 1 at Shanghai People’s Square Station. According to the data of the track acceleration test and the equation of the vehicle system vibration，a simulated deterministic expression of the metro load was obtained.The ground vibration due to the moving metro was simulated by applying the load to an FLAC3D numerical model. Through comparison of the numerical analysis results of different working conditions, the wave propagation, and attenuation at the ground surface, the dependence of the ground vibration on the tunnel depth and the frequency of the simple harmonic excitation load are analyzed.