岩土工程学报2025，Vol.47Issue(z2)：103-108,6.DOI:10.11779/CJGE2025S20013
圆柱形破坏时嵌岩桩抗拔承载力理论分析
Theoretical analysis of uplift bearing capacity of rock-socketed pile under cylindrical failure
摘要
Abstract
The ultimate uplift capacity of rock-socketed piles is a critical parameter in the design of pile foundations for structures such as transmission towers and offshore floating platforms.A theoretical calculation model for the progressive development of uplift bearing capacity of rock-socketed piles in cylindrical failure mode is proposed.A bilinear model is employed to describe the pile-rock interface shear strength.Based on the principles of static limit equilibrium,analytical expressions for axial stress,axial relative displacement between pile and soil,and side friction resistance at different stages of pile units are established.The single-variable solver in Excel is employed to determine the elastoplastic interface depth z0 at the pile-rock interface,thereby obtaining pile displacement and axial force distribution.The model demonstrates prediction errors of-8.1%and 6.1%when validated against ultimate uplift capacity measurements from both full-scale field tests of socketed single piles under uplift and scaled model tests documented in previous studies,demonstrating the validity of the proposed method.关键词
嵌岩桩/桩-岩界面/极限抗拔承载力,桩侧摩阻力,桩身轴力Key words
rock-socketed pile/pile-rock interface/ultimate uplift bearing capacity/side friction resistance/axial force分类
建筑与水利引用本文复制引用
庄道坤,郭伟,任宇晓,郭文秀,叶青..圆柱形破坏时嵌岩桩抗拔承载力理论分析[J].岩土工程学报,2025,47(z2):103-108,6.基金项目
国家自然科学基金项目(52171273,52108335) （52171273,52108335）
天津市科技计划项目(20JCJQJC00220) （20JCJQJC00220）
