支盘桩竖向承载性状模型试验研究及数值模拟  

Numerical Simulation and Experimental Study on the Vertical Bearing Character of the Model Squeezed Branch Piles

作　　者：王成武[1] 龚成中[1] 

机构地区：[1]淮阴工学院建筑工程学院,江苏淮安223001

出　　处：《建筑科学》2015年第7期80-83,共4页Building Science

基　　金：江苏自然科学基金面上项目(BK2011406):大直径深嵌岩桩基承载特性及位移场研究

摘　　要：利用数字图像相关技术(DIC),对挤扩支盘桩室内模型试验进行分析,得到竖向荷载作用下挤扩支盘桩的桩周土体位移场。挤扩支盘桩的承载力和抗沉降性能是随着支盘数量的增加而增加的,但这种增长是非线性的。利用有限元计算软件ABAQUS对模型试验进行了模拟,模拟结果和试验结果具有较好的一致性。研究成果进一步揭示了支盘桩静载过程的宏细观机制。With DIC technique,the result of indoor model experiment of the squeezed branch piles is analyzed to obtain the displacement field of soil around the squeezed branch piles. The findings indicate that the bearing capacity and the subsidence resistance of the squeezed branch piles are increasing with more branches,but this kind of growth is nonlinear. The model experiment is simulated by ABAQUS and the results have a good consistency. The findings further reveal the macro-micro mechanism of the squeezed branch piles in the process of static load.

关 键 词：支盘桩 数字图像相关技术 位移场 数值模拟 

分 类 号：TU473[建筑科学—结构工程]