多桩型复合地基试验研究

Field test of multi-type-pile composite foundation

将碎石桩与CFG桩组成的多桩型复合地基用于沿海软土地基的处理,探讨了其加固机理。通过多桩型复合地基载荷试验,测定了不同桩型及桩间土上的应力,分析了这种新型复合地基的桩土应力比的变化规律,为设计提供了可靠依据。实践表明,将碎石桩与CFG桩2种方法联合处理软土地基,可最大限度地发挥这2种方法的优点,使复合地基的承载力得到大幅度的提高。

Application of the multi- type- pile composite foundation in coastal soft soil areas is reported, the mechanism of such reinforcement method is also analyzed briefly. Stress of pile tips and stress of soil among piles are measured by plate test of the multi - type - pile composite foundation with gravel pile and cement - flyash - gravel pile, the variation of the pile - soil stress ration is analyzed, and the results have provided reliable basis for design. Compared with single - type - pile composite foundation, the multi- type- pile composite foundation is more reasonable.