粘性土地基强夯地面变形的半模试验研究  

Research on the surface deformation of cohesive soil ground due to dynamic compaction by half model test

作　　者：罗嗣海[1] 王琨[1] 邓通发[1] 

机构地区：[1]江西理工大学建筑与测绘工程学院,江西赣州341000

出　　处：《江西理工大学学报》2013年第1期17-23,共7页Journal of Jiangxi University of Science and Technology

基　　金：国家自然科学基金资助项目(50869002);江西省自然科学基金资助项目(2008GZC003);江西省教育厅科技资助项目(GJJ10486)

摘　　要：根据相似原理,设计采用3种不同直径的模型夯锤(7 cm,11 cm,15 cm),对玻璃模型箱(长×宽×高=50 cm×40 cm×60 cm)内土体分别施加4种不同冲击能进行单点夯击实验.实测了在不同锤径下,以4种夯击能作用的地面变形和在不同深度下的竖向位移,建立了夯坑深度和有效加固深度与土质参数及施工工艺参数的相关方程,最后对建立的方程用工程实例进行验证.结果表明:该方程可用来估算现场强夯时的夯坑深度和有效加固深度,故对强夯法的设计与施工具有一定的工程指导意义.According to the similarity principle, th single point lamping experiments with three kinds of different diameter model rammer （7 cm, 11 cm, 15 cm） are made. The soils in the model box of glass （L×W×H= 50 cm×40 cm×60 cm）are imposed to in four different kinds of tamping energy. Under the different diameter rammer and four tamping energy, the ground deformation and the vertical displacement along depth are measured, and the related equations about the pit depth and the effective treatment depth with the soil parameters and the construction technology parameters are established. Finally the related equations are validated with some engineering examples. The results show that the equations can be used to estimate the rammer pit depth and the effective treatment depth, which has a certain guiding significance for the design of the dynamic compaction method and construction to the project.

关 键 词：粘土 强夯 半模试验 夯坑深度 有效加固深度 相关方程 

分 类 号：TU44[建筑科学—岩土工程]