砂桩复合地基室内模型试验研究  

Research on Laboratory Experiment of Sand Column Composite Foundation

作　　者：王仙芝[1] 郑俊杰[1] 李向东[1] 

机构地区：[1]华中科技大学土木工程与力学学院

出　　处：《华中科技大学学报（城市科学版）》2007年第4期22-25,共4页Journal of Huazhong University of Science and Technology

基　　金：国家自然科学基金资助项目(50478090)

摘　　要：通过自行研发的试验装置,对砂桩群桩复合地基进行室内模型试验,得出砂桩复合地基的一些工作性状:砂桩复合地基的荷载沉降曲线特征、桩和土的应力特点、桩土应力比特点、荷载分担比曲线特征等。本室内静载荷试验模型虽然不能完全模拟现场砂桩复合地基的工作性状,但从定性上分析砂桩复合地基的工作性状是可行的。从试验结果可以看出,在处理粉细砂类土时,砂桩发挥的作用是比较显著的。A set of apparatus of foundation physical model was developed and utilized to conduct model tests of sand column composite foundation. A number of features of sand column composite foundation were obtained, including the characteristics of load-settlement curve, stress of the column, stress between columns, column-soil stress ratio, and load-sharing ratio of column and soil. Although the laboratory tests cannot precisely describe the characteristics of sand column composite foundation, they reveal the mechanism of sand column composite foundation qualitatively. It is concluded that the sand column contributes greatly for improving the silty fine sand.

关 键 词：砂桩 模型试验 复合地基 桩土应力比 荷载分担比 

分 类 号：TU472.3[建筑科学—结构工程]