CFG桩复合地基竖向承载力的研究

Study on Vertical Bearing Capacity of CFG Pile Composite Foundation

复合地基是目前广泛使用的基础形式之一,对其承载能力进行研究具有重要的工程意义。本文对复合地基的概念、分类、特点、效用以及形成的条件进行了较为深入的探讨,并对水泥粉煤灰碎石桩(CFG桩)的加固机理及其优点进行了着重阐述,分析了CFG桩成桩材料对其承载能力的影响。考虑边载影响,得到了CFG桩与桩间土的竖向承载力计算公式。最后将本文方法代入工程实例中进行计算,结果表明,其与CFG桩承载力实测值吻合良好。

It is of great importance to study on the bearing capacity of composite foundation, for it is widely applied recently. The concept ,classify, characteristic, effectiveness and forming condition pf composite foundation were deeply discussed, then, the reinforcement mechanism of CFG pile and its advantage were mainly expounded. Considering the effect of load on the boundary and the material, the formula for calculating the vertical bering capacity of CFG pile and soil between the piles were established. Lastyly, a engineering project was analyzed method, and the result indicates that, the calculating value fits well with the measured.