摘要
用有限元法对竖向桩顶荷载作用下DX桩桩周土的应力变形及桩身荷载传递特点进行了数值分析。给出了桩周土体的应力位移等值线,分析了扩径体数量、间距及形状对DX桩承载性能的影响,进一步揭示了DX桩的单桩承载力机理,可为DX桩的承载力设计提供参考。
DX pile is a belled cast in-situ concrete pile with multi-branch features. To analyze its bearing mechanism, a numerical simulation is made with the FEM in the paper. The soil is modeled with typical medium sand. The stress-strain characteristics of the soil near the pile and the load transfer mode of the DX pile are studied. The stress and displacement contours are presented. The effects of branch space, branch number and branch shape on the bearing capacity of DX pile are discussed. Results show that a majority of load of pile is borne by the branches. The study could provide a reference for the bearing capacity design of DX piles.
出处
《工程力学》
EI
CSCD
北大核心
2002年第6期67-72,共6页
Engineering Mechanics
基金
国家自然科学基金委员会与长江水利委员会联合资助项目(50099620)
清华大学骨干人才支持计划资助项目
关键词
挤扩桩
承载力
数值模拟
有限元
应力位移
Bearing capacity
Computer simulation
Finite element method
Piles
Sand
