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为研究强夯加固粉土地基地面振动衰减规律并确定强夯影响范围,依托济南-东营高速公路工程,对不同夯击能强夯加固粉土地基地面振动的速度幅值及振动频谱进行了现场测试,并基于测试数据通过量纲分析推导了强夯加固粉土地基地面振动衰减规律的计算公式。研究表明:(1)地面振动速度随距离增加呈现出不同的衰减区;(2)单击夯击能越大,强夯施工对邻近环境不利影响的范围越大,单击夯击能相同时夯击次数越多,对邻近环境影响范围越大;(3)地面振动衰减与夯击能和夯锤面积相关,随夯检距离呈负幂函数衰减,量纲分析推导出粉土地基地面振动衰减公式,经验证是合理的。
In order to study the law of ground vibration attenuation of the consolidation ground of the dynamic compaction and determine the influence range of the dynamic compaction, based on the project of Jinan-Dongying Expressway, the on-site velocity amplitude and vibration spectrum of the ground vibrations of the dynamic compaction consolidation ground are investigated Based on the test data, the calculation formula of ground vibration attenuation on the consolidation of the silt ground was deduced by dimensional analysis. The results show that: (1) the ground vibration velocity shows different attenuation zones with increasing distance; (2) the larger the impact energy of the impact, the greater the negative impact of the dynamic compaction on the neighboring environment, (3) The ground vibration attenuation and the impact energy and the area of the rammer are related, and the distance with the rammer is negatively exponentially decayed. The ground surface vibration of the ground is deduced by dimensional analysis Attenuation formula, proved to be reasonable.