摘要
强夯加固效果和对周围地基土产生的力学效应可通过现场夯击试验来确定。通过对北京园博园房渣土地基的进行现场强夯试验,监测得到夯击区域地表变形和深层水平位移的大小以及变化规律,通过对多点数据进行聚类分析,找出能够反映该地层总体特性的具体变形数据。试验表明,在夯击7次之后,夯坑深度约为1.27 m,深层的残余变形区约为夯锤直径的5倍,主要加固深度位于夯沉量3倍深的地层,单点夯击在地表产生的裂缝区范围约为夯锤直径的1.7倍左右。试验结果为进一步的研究及工程应用奠定了基础。
The soil compaction and mechanical effects of the foundation could be determined by field monitoring during the dynamic compaction.To find the variation of surface settlement and underground horizontal displacement influenced by dynamic compaction,an experiment is done on the foundation of backfilling miscellaneous soil which will be the site of China International Garden Expo Garden.Based on the cluster analysis of monitoring data,the typical result is gotten bellow.As the7th compacting finished,the depth of the pit is 1.27 m,the region of residual deformation is 5 times of hammer’s diameter,which is at depth 3 times of the pit as the best compacted layer by dynamic compaction.The crack region caused by single pit is about 1.7 times of the diameter of hammer.The test results supply a good foundation for further research.
出处
《工业建筑》
CSCD
北大核心
2013年第S1期562-565,584,共5页
Industrial Construction
关键词
强夯
监测
房渣土
dynamic compaction
monitoring
miscellaneous soil
