湖南大学学报（自然科学版）2025，Vol.52Issue(9)：38-47,10.DOI:10.16339/j.cnki.hdxbzkb.2025085
喷扩锥台压灌桩抗拔承载特性研究
Study on Uplift Bearing Behavior of Pressure-cast-in-situ Pile with Spray-expanded Frustum
摘要
Abstract
Pressure-cast-in-situ pile with spray-expanded frustum(PPSF)is a new type of pile developed by the authors,which has been widely used in practice due to its advantages of high bearing capacity and small deformation.To study the uplift bearing behavior of the PPSF,static load tests on the PPSF were carried out,and a three-dimensional finite element numerical calculation model for the uplift behavior of the PPSF was established.The reliability of the numerical calculation results was verified by using the static load test results of the PPSF.Based on the finite element numerical calculation results,the influence of factors,such as location,length-diameter ratio,diameter and frustum angle of expanded body with double-frustum,on the uplift bearing behavior of the PPSF was analyzed,and the failure mode of the PPSF and the interaction mechanism between expanded body with double-frustum and surrounding soils were clarified.The present research results can provide a reference for the establishment of deformation and bearing capacity calculation methods for the PPSF.关键词
喷扩锥台压灌桩/抗拔承载力/破坏模式/静载试验/数值模拟Key words
pressure-cast-in-situ pile with spray-expanded frustum/uplift bearing capacity/failure mode/static load test/numerical simulation分类
建筑与水利引用本文复制引用
张乾青,刘君伟,李金良,付涛,刘思维..喷扩锥台压灌桩抗拔承载特性研究[J].湖南大学学报（自然科学版）,2025,52(9):38-47,10.基金项目
国家自然科学基金资助项目(52278358),National Natural Science Foundation of China(52278358) （52278358）
山东省泰山学者青年专家项目(tsqn202103163),Young Experts of Taishan Scholar Project of Shandong Province(tsqn202103163) （tsqn202103163）
山东大学杰出中青年学者人才计划,Program of Outstanding Young and Middle-aged Scholars of Shandong University （）
