桩间距对软黏土中桩筏基础沉降特性影响研究  

Influence of Pile Spacing on the Settlement Characteristics of Pile Raft Foundation in Soft Clay

作　　者：王宇[1] 

机构地区：[1]同济大学地下建筑与工程系,上海200092

出　　处：《佳木斯大学学报（自然科学版）》2017年第1期14-18,共5页Journal of Jiamusi University：Natural Science Edition

摘　　要：为了研究桩间距对软黏土中桩筏基础共同作用特性的影响,基于大型通用有限元软件ABAQUS,本构模型采用Mohr-Coulomb破坏准则,进行理想弹塑性分析,同时考虑土的应力应变非线性特性以及筏板对承载力的影响,讨论了桩间距不同时,桩筏基础边桩、角桩、中心桩的荷载沉降特点。结果表明:当桩间距设置不同时,桩筏基础中各基桩桩顶荷载分布不均匀,从而各基桩的沉降也出现不同的特点。随桩间距增大,筏板下桩顶沉降分布由角桩沉降最大逐渐转化为中心桩沉降最大。In order to study the influence of pile spacing on the interaction charactenstics ot plied ratt foundation in soft clay, a large universal finite element software ABAQUS is used. Mohr -- Coulomb failure criterion which is an ideal elastoplastic constitutive model is applied. Considering the nonlinear characteristics of soil - pile interaction and the influence of raft on the bearing capacity of the soil, the load settlement characteristics of side pile, corner pile, and the center pile of pile - raft foundation are researched when the pile spacing is not the same. The results show that when the pile spacing is not the same, pile top load distribution of pile raft foundation is not uniform, and the pile settlement also appears different characteristics. With the increase of the pile spacing, the settlement of the center pile of raft foundation gradually becomes the biggest transformed from the corner pile.

关 键 词：桩间距 桩筏基础 竖向沉降 桩土相互作用 

分 类 号：TU473[建筑科学—结构工程]