砂土地基强夯地面变形与加固深度的半模试验研究  

Half model test research for ground deformation and treatment depth of sandy soil foundation by dynamic compaction

作　　者：石亮[1] 罗嗣海[2] 邓通发[2] 赵康[2] 胡世丽[2] 

机构地区：[1]江西理工大学应用科学学院,江西赣州341000 [2]江西理工大学建筑与测绘工程学院,江西赣州341000

出　　处：《工程勘察》2012年第2期1-4,共4页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金资助项目(项目批准号:50869002);江西省自然科学基金资助项目(项目批准号:2008GZC003);江西省教育厅科技资助项目(项目批准号:[2007]210)

摘　　要：在量纲分析的基础上,利用尺寸50cm×40cm×60cm(长×宽×高)的玻璃模型箱,采用3种不同干重度的砂土,对之施加4种不同能量的冲击能,观测了不同的夯击能作用时夯点下的地面变形与中心点下不同深度的竖向位移,拟合了位移—深度关系,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之间无量纲的相关方程,并用工程实例对方程进行了验证。结果表明:方程可有效地定量分析强夯时的夯坑深度和有效加固深度,对强夯法的设计与施工具有一定的指导意义。Several model tests to simulate dynamic compaction of different impact energy on sands of different dry unit weight were conducted in a box of size 50cm x 40cm x 60cm. The displacement fields were observed and the relationships between the vertical displacement under the center of the impact point and the depth were established. Finally, the dimensionless equations among the cracter depth, as well as the effective treatment depth, and soil property parameter and construction parameter are fitted and verified by project examples. The results show that the equations can be used to practically calculate the cracter depth and effective treatment depth.

关 键 词：砂土 强夯 半模试验 夯坑深度:有效加固深度 

分 类 号：TU4[建筑科学—土工工程]