岩土力学2012，Vol.33Issue(2)：539-546,8.
考虑桩端刺入沉降的桩土自平衡式复合地基设计
Pile-soil self-balanced composite foundation design considering pile-end piercing settlement
摘要
Abstract
The nature of composite foundation is the load from the overlying shared by the reinforcement and ground soil via the deformation compatibility. Cushion plays a coordinating role of pile-soil deformation; however, its characteristics of the work and deformation characteristics are not yet clear. Designing cushion thickness still depends on experience or reference standard. It can not fully play the bearing capacity of foundation soil. The pile-soil deformation is usually adjusted by cushion in current composite foundation design. The pile-end piercing settlement coordinates pile-soil deformation and plays the role of foundation soil bearing capacity is ignored. Using pile-end piercing settlement to adjusted pile-soil deformation and bring foundation soil bearing capacity into full play, the cushion thickness is reduced or not to set cushion, and the designed pile length is shortened in order to reduce the cost of ground handling and achieve the purpose of load shared by pile and soil finally. A design method for pile-soil self-balanced composite foundation is established through controlling pile-soil deformations adjusted by pile piercing settlement. Through contrasting with the cushion method and project examples, it is proved that the method can show the foundation soil bearing capacity better, and provide references for the optimal design of composite foundation.关键词
复合地基/桩端刺入沉降/褥垫层/桩土自平衡式/变形协调Key words
composite foundation/ pile-end piercing settlement/ cushion/ pile-soil self-balance/ deformation compatibility分类
建筑与水利引用本文复制引用
刘鹏,杨光华..考虑桩端刺入沉降的桩土自平衡式复合地基设计[J].岩土力学,2012,33(2):539-546,8.基金项目
广州市水务局水利科研项目资助(穗水科研2008-05). （穗水科研2008-05）
