压注同步对钢管桩承压性能提升机制研究
Research on the Mechanism of Improving the Bearing Capacity of Steel Tube Columns by Injection Synchronization
蒋德稳 1张涛 1田安国 1涂家璇 1翟秋萍 1刘强1
作者信息
- 1. 江苏海洋大学,江苏连云港 222005
- 折叠
摘要
文章针对海相软土地区注浆钢管桩承载力低的问题,通过足尺试验桩抗压承载力试验研究了成桩工艺、桩靴直径等对桩基承压性能的影响规律,并提出了一种提升钢管桩承压性能的压注同步成桩理论.结果表明,桩靴形式与注浆顺序对桩体承载力影响显著.采用压注同步工艺结合扩大桩靴有利于提高桩周土体与砂浆固结的稳定性,提高桩基抗压承载力.将试验结果和现行规范抗压极限承载力计算结果对比,压注同步桩极限承载力实测值约为设计计算值的1.2倍.
Abstract
Aiming at the problems of low bearing capacity of grouting steel pipe piles in marine soft soil areas,the influence of pile forming technology and pile shoe diameter on the bearing capacity of pile foundation is studied through full-scale tests of pile compressive capacity.A theory of simultaneous pile forming by pressure grouting to improve the bearing capacity of steel pipe piles is proposed.The results show that the pile shoe form and grouting sequence have a significant influence on the pile bearing capacity.The use of the pressure injection synchronization process combined with an enlarged pile boot is conducive to improving the stability of peripile soil-mortar consolidation.The compressive bearing capacity of the pile foundation can be significantly improved through pressure injection synchronous pile technology and structure.The test results were compared with the calculation results of compressive ultimate bearing capacity of current codes,and it was found that the measured ultimate bearing capacity of pressurized injection synchronous piles was about 1.2 times the calculated value.
关键词
海相软土/注浆钢管桩/压注同步成桩/承压性能/成桩工艺Key words
marine soft soil/grouting steel pipe pile/simultaneous pile forming by pressure grouting/bearing capacity/pile-forming technology引用本文复制引用
出版年
2024
NETL
NSTL
万方数据