CFG桩复合地基设计的几点认识

Discussions on CFG pile composite foundation design

根据已有的研究成果和工程实践经验总结,对《建筑地基处理技术规范》(JGJ 79—2012)中水泥粉煤灰碎石(CFG)桩复合地基的承载力检验、CFG桩布置及CFG桩复合地基和桩基的异同进行探讨和分析,得出如下结论:在实际工程中可根据规范要求综合考虑CFG桩复合地基承载力检验方法;CFG桩复合地基在对地基承载力要求较高和地基沉降允许变形较小的工程中的应用具有一定的局限性。拓展了CFG桩复合地基的设计思路和计算方法,可供工程技术人员参考。

According to existing research and practical engineering experience, studies were carried out including bearing capacity test of the cement-fly ash-gravel （CFG） pile composite foundation in Technical code for ground treatment of buildings（JGJ 79--2012） , layouts of C FG piles and the comparison between CFG pile composite foundation and the pile foundation. The results show that inspection method of bearing capacity of CFG pile composite foundation may be considered in the practical project comprehensively according to require of the codes. Application of CFG pile composite foundation in the project with large bearing capacity and small settlement deformation requirements has the limitation. Design ideas and calculation methods of CFG pile composite foundation were expanded, which can provide reference for engineering technical personnel.