水泥土桩复合地基荷载传递特性有限元分析  

Finite Element Analysis of Load Transfer Property of Soil-cement Group Piles Composite Foundation

作　　者：李建军[1,2] 梁仁旺[1] 白晓红[1] 

机构地区：[1]太原理工大学建筑与土木工程学院,山西太原030024 [2]中北大学土木工程系,山西太原030051

出　　处：《太原理工大学学报》2009年第2期152-155,168,共5页Journal of Taiyuan University of Technology

基　　金：山西省自然基金资助项目(2008011055)

摘　　要：建立了带垫层的水泥土群桩复合地基有限元弹塑性模型,采用Drucker-Prager屈服准则,分析了群桩复合地基的荷载传递规律,指出沿桩身摩阻力传递规律与群桩相似,但中间桩变化小,边桩变化大;不同位置处桩身轴力分布也不均匀,边桩的轴力比中间桩要高出一倍多;桩间土应力呈现两头大,中间小的趋势。An elastic-plastic finite element model was established for the group piles composite foundation with cushion. By Drucker-Prager yield criteria, the loading transmission mechanism and bearing behaviors of the group piles composite foundation were analyzed. It was indicated that the lateral friction changes of composite foundation are similar with that of the group piles, but the changes of center piles are smaller than that of outside piles. The axial distributions of the different location piles are not uniform, and the axial force of outside piles are twice that of inner piles. The soil pressures near middle pile shaft are smaller than those near the pile head and the pile tip.

关 键 词：水泥土桩 复合地基 荷载传递 有限元模型 

分 类 号：TU472.36[建筑科学—结构工程]