黄土场地高铁路基工程素土挤密桩施工振动测试分析

Vibration Test and Analysis of Construction of Plain Soil Compacted Piles for High-speed Railway Foundation Engineering on Loess Field

以黄土路基工程素土挤密桩为研究对象,对挤密桩施工的实时振动进行了现场监测,根据加速度时程曲线对比分析得到施工振动时的衰减规律及影响程度。结果显示,随着距施工点距离的变大,各测点水平和垂直向振动加速度数据衰减明显,同时,对施工振动下各测点三方向最大加速度进行拟合分析,得到最大加速度随距离的衰减曲线,其振动加速度的衰减规律与距离成指数关系。

Taking the plain soil compaction pile of loess subgrade engineering as the research object,the real-time vibration of compaction pile construction is monitored on site.According to the acceleration time history curve,the attenuation law and influence degree of construction vibration are obtained.The results show that with the distance from the construction point increasing,the horizontal and vertical vibration acceleration data of each measuring point attenuates obviously.At the same time,the maximum acceleration of each measuring point in three directions under construction vibration is fitted and analyzed,and the attenuation curve of maximum acceleration with distance is obtained.The attenuation law of vibration acceleration is exponential with distance.