摘要
为了研究公路交通荷载引起的振动随深度的衰减规律,分别对深度为5.5 m.19.5 m、34.5 m.39.5 m的孔中测点以及孔口附近地面测点进行了位移振动同步测试,并在时域和频域上分别对有车工况和无车工况下的实测数据进行了分析。结果表明:随着深度的增加,交通振动中的高频部分会迅速衰减.低频部分则衰减缓慢,铅垂方向位移衰减因子相比水平方向衰减因子衰减得更快;有车工况下,铅垂方向位移幅值在深度39.5 m处仅为地面的15%.振动衰减已很明显。
In order to study the attenuation law of vibration with depth caused by highway traffic,the measuring points in the holes of 5.5 m,19.5 m,34.5 m and 39.5 m,and the ground measuring points nearhy the holes are measured synchronously of displacement vibration,and the measured data in the vehicle and non-vehicle conditions are analyzed respectively in the time domain and frequency domain.The results show that the high frequency part in the traffic vibration decays rapidly and the low frequency part decays slowly as the depth increases.The vertical displacement attenuation factor decays faster than the horizontal attenuation factor.In the condition of vehicle,the vertical displacement amplitude at depths of 40 meters is only 15%of that on the ground,and the vibration attenuation has been obvious.
作者
谢永健
李宁
徐宏文
Xie Yongjian;Li ning;Xu Hongwen
出处
《城市道桥与防洪》
2020年第1期133-136,M0016,共5页
Urban Roads Bridges & Flood Control
基金
上海市市级科技重大专项资助课题(2017SHZDZDZX02)。
关键词
公路交通振动
土体振动
衰减
highway traffic vibration
soil vibration
attenuation
