强夯地基加固效果检测的分析  

Study on Dynamic Penetration Test (DPT) of Dynamic Consolidation of Foundation Soil

作　　者：蔡剑波[1] 刘良贵[1] 黎友添[1] 

机构地区：[1]广州市市政工程设计研究院,广东广州510060

出　　处：《岩土工程技术》2010年第3期109-113,共5页Geotechnical Engineering Technique

摘　　要：深圳某加工厂项目场区原地形高差大,需平整场地,回填砾质粘性土采用强夯处理,夯击能为4000kN·m,并用重型动力触探检测强夯地基处理效果。重型动探检测结果显示夯点下地基土存在松弛、硬壳、衰减层等分层现象。夯点下深度与地基土动探击数为三次方函数或幂函数关系,体现了振动波振幅和加速度峰值随着深度衰减的规律,佐证了强夯地基土是通过振动波(主要是纵波)得到加固的观点。夯点间地基土则未显示显著的分层,说明强夯地基土具有复合地基的特征。The original terrain elevation difference is very large in a factory of Shenzhen. In order to flat ground, we use dynamic compaction （4 000 kN·m） to consolidation of foundation soil. Revealed by dynamic penetration test （DPT）, there is the level of foundation soil stratification. Depth and DPT blow count is a function of cubic or power. Its the evidence of the dynamic consolidation of foundation soil by vibration waves （mainly P-wave） have been reinforced. There is no significant hierar- chical feature, between the tamper-point foundation soils.

关 键 词：强夯 动力触探 影响深度 

分 类 号：TU472.31[建筑科学—结构工程]