中南大学学报（自然科学版）2017，Vol.48Issue(5)：1276-1282,7.DOI:10.11817/j.issn.1672-7207.2017.05.021
扩底楔形桩竖向抗拔承载力理论计算方法
Uplift bearing capacity calculation method of belled wedge pile
摘要
Abstract
Based on the limit equilibrium principle, one unified composite failure surface with unknown parameters under the vertical ultimate load was built, in which pile type and soil parameters were considered. Then the unknown parameters and the function of the composite failure surface expression were determined by the principle of the minimum and maximum values. The ultimate bearing capacity was obtained based on composite failure surface expression. The accuracy and reliability of the theoretical model built in this paper was verified by comparing with model test results. Then, influence pile parameters (such as, enlarged pile base, and taper angle, etc.) and soil parameters (such as, cohesion, and internal friction angle, etc.) analyze were carried out. The research results show that the ultimate pullout capacity of belled wedge pile can be calculated by the established theoretical calculation method effectively.关键词
桩基/扩底楔形桩/抗拔承载力/极限原理/破坏面Key words
pile foundation/belled wedge pile/uplift bearing capacity/ultimate principle/failure surface分类
建筑与水利引用本文复制引用
周立朵,周航,孔纲强,郝耀虎..扩底楔形桩竖向抗拔承载力理论计算方法[J].中南大学学报（自然科学版）,2017,48(5):1276-1282,7.基金项目
国家自然科学基金资助项目(51278170,U1134207) (Projects(51278170, U1134207) supported by the National Natural Science Foundation of China) （51278170,U1134207）
