摘要
为了更准确地分析砂土地基中水平受荷刚性单桩的极限承载力,基于桩-土相互作用,推导出被动侧桩周实际径向土压力,并根据实际径向土压力分别提出极限土抗力和侧阻抗力矩改进计算方法。在此基础上,建立考虑侧阻抗力矩、桩端水平力和弯矩影响的刚性单桩水平极限承载力计算模型,给出水平极限承载力解析解。最后,通过算例验证本文方法的正确性。研究结果表明:本文推导的极限土抗力和侧阻抗力矩更符合实际受力状态;水平极限承载力改进计算方法可使平均相对误差由-15.914%减小到2.089%,可为工程实际提供参考。
In order to analyze lateral ultimate bearing capacity of rigid pile in sandy soil foundation more accurately, the actual radial soil pressure was obtained based on the pile-soil interaction. Furthermore, the improved calculation methods of ultimate soil resistance and shaft resisting moment were derived respectively according to the actual radial soil pressure. On this basis, the calculation model of lateral ultimate bearing capacity of rigid pile was established by taking the influence of shaft resisting moment, lateral load and bending moment at pile tip into account, and its analytical solution was obtained. Finally, the correctness of the proposed method in this paper was verified by examples. The results show that the ultimate soil resistance and shaft resisting moment deduced in this paper are more consistent with the actual stress state. Meanwhile, the improved calculation method of lateral ultimate bearing capacity can reduce the average relative error from-15.914% to 2.089%, which can provide reference for engineering practice.
作者
付臣志
江杰
欧孝夺
龙逸航
张探
FU Chenzhi;JIANG Jie;OU Xiaoduo;LONG Yihang;ZHANG Tan(College of Civil Engineering and Architecture,Guangxi University,Nanning 530004,China;Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education,Guangxi University,Nanning 530004,China;Guangxi Key Laboratory of Disaster Prevention and Engineering Safety,Guangxi University,Nanning 530004,China)
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2021年第10期3668-3679,共12页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(52068004,51978179)
广西自然科学基金资助项目(2018JJA160134)
广西重点研发计划项目(AB19245018)。
关键词
刚性单桩
极限土抗力
侧阻抗力矩
水平极限承载力
参数分析
rigid pile
ultimate soil resistance
shaft resisting moment
lateral ultimate bearing capacity
parameter analysis
