打桩振动传播规律现场实测研究  

ON SITE MEASUREMENT AND RESEARCH ON THE PROPAGATION LAW OF PILE DRIVING VIBRATION

作　　者：王健成 张明青 程慧媛 程琴辉 WANG Jiancheng;ZHANG Mingqing;CHENG Huiyuan;CHENG Qinhui(Hebei University of Architecture,Hebei Zhangjiakou 075132,China;Beijing Minghong Technology Development Co.,Ltd.,Beijing 100043,China;China Architecture Northeast Design and Research Institute Co.,Ltd.,Shenyang 110001,China)

机构地区：[1]河北建筑工程学院,河北张家口075132 [2]北京铭弘科技发展有限公司,北京100043 [3]中国建筑东北设计研究院有限公司,沈阳110001

出　　处：《低温建筑技术》2025年第3期15-19,共5页Low Temperature Architecture Technology

基　　金：张家口市基础研究专项(2322003A);河北建筑工程学院研究生创新基金项目(XY2024010)。

摘　　要：为探明挤密桩施工在成孔过程中所产生的振动特性及传播衰减规律,文中开展了施工机械附近地表竖向加速度的现场实测,从实测结果的时域和频域两方面的变化特性对振动特性及衰减规律进行研究。实测结果表明,随着距离的增大,振动加速度幅值急剧减小,且振动主频分布在20~50 Hz范围内,满足国际标准频率范围,但随着距离的增加,主峰频率所对应的加速度逐渐减少。此外,随着锤击次数的增加,土体的振动加速度呈现逐渐上升的趋势,且在0~10 m范围内振动加速度呈线性衰减,10 m后衰减速率放缓。此研究可为挤密桩施工过程中振动传播规律的分析及振动控制提供参考依据,有助于减少施工振动对周边环境和建筑物的影响。To investigate the vibration characteristics and attenuation law during the hole-forming process of dynamic compaction piles,field measurements of vertical ground acceleration near construction machinery were conducted.The vibration characteristics and attenuation law were analyzed from both time-domain and frequency-domain perspectives based on the measured data.The results indicate that as the distance increases,the vibration acceleration amplitude decreases sharply,with the dominant frequency ranging from 20~50 Hz,which falls within the international standard frequency range.However,the acceleration corresponding to the dominant peak frequency gradually decreases with increasing distance.Additionally,as the number of hammering impacts increases,the soil vibration acceleration shows a rising trend.Within 0~10 m,the vibration acceleration exhibits linear attenuation,while beyond 10 m,the attenuation rate slows down.This study provides a reference for analyzing vibration propagation laws and controlling vibration during dynamic compaction pile construction,helping to mitigate the impact of construction-induced vibrations on the surrounding environment and structures.

关 键 词：挤密桩 振动传播 冲击荷载 主峰频率 

分 类 号：TU472[建筑科学—结构工程]