钻孔灌注桩后压浆技术的工程实践

就盐城某机床厂改扩建工程，采用钻孔灌注桩后压浆技术，大幅度提高单桩承载力的工程实例进行了介绍，提出了后压浆灌注桩的工艺流程和技术要点，得出了该施工工艺经济效益显著的结论，以推广钻孔灌注桩后压浆技术的应用。

On the project application of the post pressure grouting technique for cast-in-place bored piles

Taking the expansion project of some machine tool plant in Yancheng city,the paper gives an introduction of the project example in which the loading capacity of the single pile is greatly increased by adopting the post pressure grouting technique for pouring piles in the cast-in-place bored piles, points out the operation process and technical points of the technique,and concludes that the economic benefits of the construction craft is improved,so as to expand the application of the technique.