南京工业大学学报（自然科学版）2024，Vol.46Issue(4)：455-463,9.DOI:10.3969/j.issn.1671-7627.2024.04.010
循环压拔荷载作用下桩基础模型试验研究
Experimental study on pile foundation models under cyclic compression and tension loads
摘要
Abstract
With the continuous rise of large-scale buildings,pile foundation,as one of the commonly used foundation forms in the western region,plays an irreplaceable role in bearing uplift forces.In order to study the bearing characteristics of pile foundation under cyclic loading,single pile pull-out tests,cyclic press-pull tests,and cyclic pull-out tests were conducted on a typical loess foundation in the Loess Plateau area.The study analyzed the distribution patterns of axial displacement at the pile top and the side friction strength of the pile under cyclic compression and pull-out loading paths.It elucidated the variations in pile bearing capacity under different numbers of cycles and varying cyclic loading magnitudes.The results showed that the amplitude of cyclic loading and the number of cycles were important factors affecting the change of axial displacement at the top of the pile,and a weakening coefficient parameter was introduced to quantitatively describe the influence of the number of cycles.The greater the load,the higher the side friction of the pile,but overall.the side friction tended to decrease under cyclic loads.Cyclic compression and pullout loading could reduce the damage to the contact between the pile and soil to a certain extent,resulting in less loss of pile foundation bearing capacity.This study has profound engineering significance for the research on the bearing capacity of pile foundation under vertical cyclic compression and pull-out loads.关键词
抗拔桩/循环荷载/轴向位移/侧摩阻力/桩基承载力Key words
uplift pile/cyclic loading/axial displacement/side friction resistance/bearing capacity of pile foundation分类
建筑与水利引用本文复制引用
朱武卫,张树筱,刘彤,刘义,李哲,刘路路,邵登峰,马锡洋..循环压拔荷载作用下桩基础模型试验研究[J].南京工业大学学报（自然科学版）,2024,46(4):455-463,9.基金项目
江苏省卓越博士后计划(2022ZB529) （2022ZB529）
江苏省自然科学基金青年基金(BK20221136) （BK20221136）
陕西省重点研发计划(2021SF-459) （2021SF-459）
