湖南大学学报（自然科学版）2026，Vol.53Issue(3)：88-98,11.DOI:10.16339/j.cnki.hdxbzkb.2026027
螺纹结构对螺纹桩双桩竖向承载特性的影响研究
Study on influence of threaded-structure on vertical bearing characteristics of double piles of threaded piles
摘要
Abstract
Based on three-dimensional finite element numerical simulation analysis,a numerical analysis model of double piles under vertical load was established,and the influence of different design parameters(including pile spacing,thread height,and thread length)on the vertical bearing characteristics of double piles of threaded piles was investigated.Meanwhile,the change rule of the soil displacement nephogram around the pile was analyzed,and the axial force transfer characteristics of the pile shaft were revealed and combined with the effect of bearing capacity and pile utilization rate of pile body material in order to explore the optimal design interval of the threaded structure.The results show that:with the increase of pile spacing,the mutual interference effect between piles is reduced,the load-bearing capacity of double piles is increased,and the load-bearing performance of double piles is better when the pile spacing is 4~5 times the pile outer diameter.Increasing thread height can strengthen the mechanical occlusion of the threads with the soil,which in turn enhances the bearing capacity of the double piles.In addition,the double-pile bearing capacity with the ratio of the thread height to the inner diameter of the pile of 0.5~0.6 is fully utilized.Increasing the thread length can effectively increase the contact area of the pile-soil body,thereby enhancing the lateral frictional resistance of the pile and improving the double-pile bearing capacity and the utilization rate of pile material.The optimal double-pile bearing performance was also obtained with a thread length to pile length ratio of 0.6~0.7.The most efficacious method of enhancing the bearing capacity of double piles is to increase the thread length.关键词
螺纹桩双桩/螺纹结构设计/承载力/材料利用率/数值模拟Key words
double piles of threaded piles/threaded structure design/bearing capacity/material utilization rate/numerical simulation分类
建筑与水利引用本文复制引用
徐丽娜,张鹏,孙爽..螺纹结构对螺纹桩双桩竖向承载特性的影响研究[J].湖南大学学报（自然科学版）,2026,53(3):88-98,11.基金项目
国家自然科学基金资助项目(52008185),National Natural Science Foundation of China(52008185) （52008185）
