地铁运行引起邻近隧道振动实测分析

通过统计各测点的加速度峰值、加速度振级以及频域数据,分析了地铁荷载对邻近隧道的振动传播规律。实测结果表明:隧道内部以竖直向振动为主,在距离最近的拱腰处水平向振动较大,纵向振动明显较小;各测点频域规律与测点位置无关,振动主频主要在50~80Hz;三分之一倍率频程在5Hz以内的振动较弱,在60Hz处振动最强。

Through the statistics of the acceleration peak,acceleration vibration level and frequency domain data of each measuring point,the vibration propagation law of the metro load to the adjacent tunnel is analyzed.The actual measurement results show that the vertical vibration is mainly in the tunnel,the horizontal vibration is greater at the nearest arch waist,and the longitudinal vibration is significantly smaller;the frequency domain law of each measurement point is independent of the measurement point position.The main frequency of vibration is mainly in the range of 50~80 Hz;the vibration of the one-third multiplier frequency range within 5 Hz is weak,and the vibration is strongest at 60 Hz.