岩土工程学报2026，Vol.48Issue(z2)：18-22,5.DOI:10.11779/CJGE2026S20032
路堤荷载下砼芯砂桩复合地基固结沉降特性
Consolidation and settlement characteristics of concrete-cored sand pile composite foundations under embankment loading
摘要
Abstract
A comparative in-situ experimental study is conducted to investigate the surface settlement,layered settlement,and pore water pressure dissipation of composite foundations reinforced with concrete-cored sand(CCS)piles and PHC pipe piles under embankment loading.Considering the annular drainage boundary condition of the CCS piles,a formula for the consolidation degree calculation of the composite foundation under staged loading is derived,and the degrees of consolidation of the two composite foundations are compared.The results show that the surface settlement of the CCS pile composite foundation during construction is 4 cm greater than that of the PHC pipe pile composite foundation.The layered settlement of the CCS pile composite foundation is larger,which enables full mobilization of shaft friction along pile shafts and increases the depth of load transfer.In the CCS pile system,the sand pile serves as a drainage channel,which accelerates the dissipation of excess pore water pressure,increases the degree of consolidation during construction,shortens the embankment filling period and foundation settlement stabilization time,and reduces post-construction settlement.Under staged loading,the degree of consolidation of the CCS pile composite foundation is 35%higher than that of the PHC pipe pile composite foundation.The findings of this study can provide important guidance for the design and construction of similar projects.关键词
道路工程/复合地基/现场试验/砼芯砂桩/PHC管桩/固结度Key words
road engineering/composite foundation/field test/concrete-cored sand pile/PHC pipe pile/consolidation degree分类
建筑与水利引用本文复制引用
陈盛原,关云飞,齐虎,陈荣平,赵维炳..路堤荷载下砼芯砂桩复合地基固结沉降特性[J].岩土工程学报,2026,48(z2):18-22,5.基金项目
国家重点研发计划项目(2023YFB2604202) （2023YFB2604202）
江苏省基础研究计划项目(BK20250284) （BK20250284）
中央级公益性科研院所基本科研业务费专项资金资助项目(Y325006) （Y325006）
中国博士后科学基金第76批面上项目(2024M761465) （2024M761465）
国家自然科学基金项目(52271286) （52271286）
淮河入海水道二期工程重大科研项目(RHSD2/FW-2024-01) （RHSD2/FW-2024-01）
江苏省水利科技项目(2025001) （2025001）
