三峡大学学报（自然科学版）2024，Vol.46Issue(3)：64-69,6.DOI:10.13393/j.cnki.issn.1672-948X.2024.03.010
钙质砂地基中群桩基础荷载传递特性研究
Study on Load Transfer Characteristics of Pile Group Foundation in Calcareous Sand Foundation
摘要
Abstract
In order to study the performance characteristics of pile group foundation in the bearing process of calcareous sand foundation,the static load test of pile group foundation under different pile spacing conditions is carried out.The Q-S curve and S-lg t curve of pile group under different pile spacing conditions are obtained,and the ultimate bearing capacity Fuof3d,4.5d and 6d(dis pile diameter)pile group under static load conditions is measured.The trend of pile axial force,pile side friction and pile end resistance of each pile section is studied.The results show that the Q-S curve of the pile group is a slow change type,and the S-lgt curve is a gradual change type.The bearing deformation of the pile foundation is roughly divided into three stages,i.e.the stable stage,the progressive stage and the failure stage.Compared with the 3d pile group,the settlement of the 4.5d and 6d pile groups develops more slowly,and the Fu ultimate bearing capacity is higher.Under the same pile spacing,the calcareous sand foundation shows a stronger pile group effect than the terrestrial sand foundation,and the optimal pile spacing of the pile group in the calcareous sand foundation should be between 4.5d～6d.This study provides data support and theoretical reference for the application of pile groups in calcareous sand foundation.关键词
钙质砂地基/混凝土群桩/模型试验/承载特性Key words
calcareous sand foundation/concrete pile group/model test/load bearing characteristics分类
建筑与水利引用本文复制引用
王瑞红,王辉,骆浩,王芳..钙质砂地基中群桩基础荷载传递特性研究[J].三峡大学学报（自然科学版）,2024,46(3):64-69,6.基金项目
国家自然科学基金面上项目(51979151) （51979151）
湖北省自然科学基金杰青项目(2021CFA090) （2021CFA090）
三峡大学三峡库区地质灾害教育部重点实验室开放基金项目(2020KDZ07) （2020KDZ07）
