摘要
强夯因其施工简单,费用低等优点,成为世界范围内受到广泛应用的一种地基加固处理技术。但是,强夯施工过程中产生的地表振动也会对邻近的建筑物造成不同程度的损害。为了掌握强夯振动特征及加速度衰减规律,以广东某核电站二期BOP区强夯地基加固工程为例,通过现场实测振动加速度数据,分析了强夯振动特征及不同夯能作用下强夯振动加速度衰减规律。结果表明,强夯引起的地面振动持续时间较短,在同一个夯点且夯能相同的情况下,随着夯击数的增加振动加速度峰值大小呈现增加的趋势,不同夯能作用下场地的加速度振动衰减规律可以用一个统一的公式表示,便于强夯振动影响范围的确定。
Dynamic compaction is a widely-used method in ground improvement around the world because of its simple constructing procedure and low cost.but,the surface vibration caused by dynamic compaction has different degrees impacts on the adjacent buildings during the construction process.In order to find out the vibration characteristics and the propagation and attenuation law caused by dynamic compaction,the dynamic compaction treatment of BOP section in a nuclear power station was taken as an example in this paper.Based on the site monitoring data,the vibration characteristics and the propagation and attenuation law caused by different dynamic compaction energy are analyzed.The results showed that the vibration duration time is very short;the peak value of vibration acceleration increases with the number of poundings,and one generalized formula is put forward.The attenuation law under different dynamic compaction energy can be expressed by a united formula.It's useful to determine the influence of the vibration.
出处
《安徽理工大学学报（自然科学版）》
CAS
2012年第3期67-70,共4页
Journal of Anhui University of Science and Technology:Natural Science
关键词
强夯
振动
衰减规律
监测
dynamic compaction
vibration
attenuation law
vibration monitoring
