太原理工大学学报2025，Vol.56Issue(2)：268-280,13.DOI:10.16355/j.tyut.1007-9432.20230391
不同变刚度构造桩头增强措施水平承载特性研究
Research on the Horizontal Bearing Capacity of Pile Head Reinforcement Measures with Different Variable Stiffiness Structures
李响 1刘嘉琦 1郭昭胜 1王玮 1张泽华 1赵靖1
作者信息
- 1. 太原理工大学土木工程学院,山西 太原||太原理工大学土木工程防灾与控制山西省重点实验室,山西 太原
- 折叠
摘要
Abstract
[Purposes]To solve the problem that the joint between rigid connection pile cap and pile head is easy to be damaged,single pile model tests are carried out in a geotechnical box to study the seismic performances of the connection between pile head and pile cap,"pile companion",and connection wall.[Methods]On this basis,based on the actual transmission line foundation project 2×2 low-cap PHC elastic medium-long pile group was adopted to further elaborate,the above-mentioned variable stiffness structure enhancement mechanism,and the finite element method was used to study the horizontal bearing characteristics of the pile head before and after the setting of vari-able stiffness structure in the pile group.[Findings]The results show that the variable stiffness struc-ture outside the pile head can improve the seismic and horizontal bearing capacities of the pile top by expanding the cross section of the pile head,improving the bending stiffness of the pile head,and greatly reducing the negative bending moment of the pile top.When the horizontal load is applied to 1.6Hu=3 200 kN,the variable stiffness structure outside the pile head can improve the horizontal bear-ing capacity of the pile top by 27.50%～29.92%.At the same time,the working range of the soil around the pile is increased,and the horizontal deformation of the foundation soil is reduced by 22.1%～26.53%.The circular sleeve and connecting wall can play a role in any soil condition.In prac-tical engineering,it is necessary to comprehensively consider the limit heigth and thickness-to-diameter ratio of variable stiffness structure to avoid the waste of building materials.关键词
变刚度/PHC管桩/弹性中长桩/有限元分析/桩头外部增强Key words
variable stiffness/PHC pile/elastic medium-long pile/finite element analysis/exter-nal reinforcement of pile head分类
建筑与水利引用本文复制引用
李响,刘嘉琦,郭昭胜,王玮,张泽华,赵靖..不同变刚度构造桩头增强措施水平承载特性研究[J].太原理工大学学报,2025,56(2):268-280,13.
