湿陷性黄土地区水泥粉煤灰碎石桩复合地基的应用研究

利用水泥粉煤灰碎石桩（CFG桩）对湿陷黄土地基进行处理，能有效消除湿陷性黄土的湿陷性、对湿陷黄土地基的加固效果良好、CFG桩的成桩方法多样、可选择多种施工机械进行施工作业。研究依托于在湿陷黄土地基上建筑某甲类大型建筑物过程中对湿陷黄土地基进行处理项目,采用试验验证CFG桩对湿陷黄土的处理效果。经实际工程检验，CFG桩对实现黄土地基具有良好的改良效果。

Application study on cement fly-ash gravel pile composite foundation in collapsible loess area

Using cement fly ash gravel pile (CFG pile) to treat the collapsible loess foundation can effectively eliminate collapsibility of collapsible loess,have good reinforcement effect on the collapsible loess foundation,have various pile forming methods for CFG pile,and can select a variety of construction machinery for construction.The research relies on treatment project of collapsible loess foundation in the process of building a class a large building on the collapsible loess foundation,and uses tests to verify the treatment effect of CFG piles on collapsible loess.The practical engineering test shows that CFG pile has a good effect on the improvement of loess foundation.