文章通过介绍太铁佳苑经济适用房项目桩基工程的施工,分析影响钻孔灌注桩承载力的主要因素,以及钻孔灌注桩后注浆加固机理,后注浆技术解决了桩身泥皮及桩底成渣,缩短了桩长,提高了单桩承载力,论述了解钻孔灌注桩后注浆优点以及施工工艺,是值得推广应用的一项新技术。 This paper introduces the construction of pile foundation project of affordable housing project in Taijijiayuan, analyzes the main factors that affect the bearing capacity of cast-in-place bored pile, the grouting reinforcement mechanism of bored pile and the post-grouting technology to solve the problem of pile mud And pile bottom into slag, shortening the length of the pile and improving the bearing capacity of single pile. It is worth to popularize and apply a new technique to understand the advantages of grouting after drilling pile and construction technology.