冲击加速度测试法在强夯实时检测中的应用  

Application of impact acceleration testingmethod for real-time dynamic compaction detection

作　　者：李万莉[1] 顾明浩[1] 

机构地区：[1]同济大学机械与能源工程学院,上海201804

出　　处：《中国工程机械学报》2013年第5期446-450,共5页Chinese Journal of Construction Machinery

摘　　要：强夯法具有施工简单、效果好、费用低等优点,在多种地基土和各类工程,尤其大面积地基处理的工程中应用强夯法的优势很显著.目前,强夯施工时一般依据强夯技术规程采用测量夯沉量的方法来实时检测夯实程度.首先介绍了几种不同实时测量夯沉量的方法以及利用强夯冲击时夯锤的加速度或土的受力变换来实时检测夯实程度的方法.然后,通过实验发现加速度的峰值和作用时间与夯沉量有着非常紧密的关系.峰值的变化规律基本和累积夯沉量保持一致,作用时间的变换和单次夯沉量的变化类似.最后,提出了利用MEMS加速度传感器和无线芯片作为加速度采集系统的新方法.With the strongholds of easy construction, good effect and low cost, the dynamic compaction is advantageous in various applications for ground construction, especially for large-scale ground treatment. According to the technical regulations, a ramming value measurement method is currently applied for real- time compaction degree detection. Firstly, several ramming value measurement methods, together with im- paction degree detection methods via ram acceleration or soil loading transformation, are introduced. By speculating the correlation between acceleration peak value/impact duration and ramming value, it is then found that the law of peak value variation is accorded with that of accumulative ramming value, while the impact duration transformation is similar to single ramming value variation. Finally, a novel method for ac- celeration sampling is proposed using MEMS accelerometer and wireless chip.

关 键 词：强夯 加速度 实时检测 

分 类 号：TU662[建筑科学—建筑技术科学]