多桩型复合地基在湿陷性黄土中的应用

摘要

Through an application of the multi-type-pile composite foundation with earth piles and CFG piles to collapsible loess, the method for the design of the multi-type-pile composite foundation is introduced, the bearing capacity of the composite foundation is analyzed, and the collapsible treatment effect is described by in situ tests. The results show that the multi-type-pile composite foundation can make full use of the potential of piles and soils between piles by reasonable design; it not only enhances the bearing capacity of the natural foundation but also eliminates the collapsibility of loess, and it can effectively control the average settlement.%结合土挤密桩与CFG桩组成的多桩型复合地基处理湿陷性黄土地基工程实例,讨论多桩型复合地基的设计方法,分析复合地基的承载力,并通过原位试验对复合地基处理黄土湿陷性的效果进行分析.试验结果表明,通过合理的工程设计,土挤密桩与CFG桩组成的多桩型复合地基能充分发挥桩和桩间土的优势,不仅可以消除黄土的湿陷性,而且能大幅度地提高地基的承载力、很好地控制地基沉降.