东南大学学报（英文版）2025，Vol.41Issue(3)：295-304,10.DOI:10.3969/j.issn.1003-7985.2025.03.005
桩端压浆对桩端阻力承载性状的试验研究
Experimental study on the pile-tip resistance bearing characteristics of postgrouting at pile tip
摘要
Abstract
Postgrouting at the pile tip enhances the perfor-mance of cast-in-place piles.To clarify the performance of tip and side resistances,this study analyzed static load test data from two test piles before and after grouting.Mechanisms underlying an improvement in tip resistance and the influence of postgrouting on side resistance were investigated via theoretical analysis.Finally,a design method for tip resistance control via settlement was pro-posed.Results indicate that the ultimate bearing capacity of piles increases after grouting compared to before,un-derscoring the importance of tip grouting in gravelly soils and its profound impact on load transmission in pile foun-dations.Postgrouting at the pile tip enhances the strength as well as initial stiffness of the bearing stratum,ulti-mately elevating the overall pile foundation-bearing capac-ity.Additionally,tip grouting helps in strengthening over-all side resistance,especially around the pile tip.The grouting procedure has an impact on the soil's arching ef-fect at the pile tip;the extent of the arching effect and an increase in horizontal tension close to the pile tip are posi-tively correlated with the effectiveness of grouting rein-forcement.The design method for tip resistance control via settlement based on measured data statistics was vali-dated using engineering examples,and the method has a practical reference value.关键词
桩端压浆/桩端阻力/桩侧摩阻力/负摩阻力/增强效应/预压作用Key words
postgrouting at pile tip/pile-tip resistance/pile-side resistance/negative skin friction/enhancement effect/precompression effect分类
建筑与水利引用本文复制引用
张润泽,王宏涛,王磊,龚维明,万志辉..桩端压浆对桩端阻力承载性状的试验研究[J].东南大学学报（英文版）,2025,41(3):295-304,10.基金项目
The National Natural Science Foundation of China(No.52008100,52178317),the Natural Science Foundation of Jiangsu Province(No.BK20200400),China Postdoctoral Science Foundation(No.2022M723534),the Natural Science Foundation of Jiangsu Higher Education Institutions of China(No.23KJA560005). （No.52008100,52178317）
