灌注桩后注浆技术在城市立交工程中的应用  

Application of Post-grouting Technology of Cast-in-situ Piles for City Overpass Bridge

作　　者：邹勇 杜海强 

机构地区：[1]中铁工程设计咨询集团有限公司郑州设计院,郑州450001 [2]湖南省电力勘测设计院,长沙410000

出　　处：《铁道标准设计》2014年第4期52-54,共3页Railway Standard Design

基　　金：郑州市重大科技专项课题(113PSHKS439)

摘　　要：结合工程实例介绍灌注桩后注浆施工工艺,分析城市立交工程中的灌注桩后注浆技术,并通过试验结果分析得出复合后注浆技术对桩侧摩阻力和桩端阻力的提高系数,表明复合后注浆技术可大幅提高桩基承载力,节约工程投资。In combination with actual project cases, the paper introduced the post-grouting technology of cast-in-situ piles, and analyzed the application of post-grouting technology of cast-in-situ piles in city overpass bridges. Meanwhile, through analysis on experiment results, the increasing coefficients of both the pile side friction and the pile tip resistance, which arose from the composite post-grouting technology, were obtained in this paper. And this proves that the composite post-grouting technology can be conducive to increasing the pile foundation bearing capacity and decreasing the project investment considerably.

关 键 词：桥梁基础 灌注桩 注浆 桩基承载力 

分 类 号：U443.1[建筑科学—桥梁与隧道工程]