CFG桩复合地基承载机理及其应用

BEARING MECHANISM OF CFG PILES COMPOSITE SUB-GRADE AND ITS APPLICATION

CFG桩地基处理技术正在越来越广泛的得到应用。结合其在北京奥运场馆建设中的应用,介绍了CFG桩复合地基的承载力特征;重点论述CFG桩复合地基的承载机理以及褥垫层的作用机理,CFG桩的桩长、桩径、单桩承载力等参数的选取,并对复合地基沉降量进行计算和现场实测。应用表明,CFG桩复合地基能很好地适应本工程的需要,取得了良好的效果。

Cement Fly-ash Gravel(CFG)pile sub-grade technology has been used more and more widely.Based on its using in Olympic Gym in Beijing University of Science and Technology ,the bearing capacity characters of CFG piles composite sub-grade is introduced.Bearing mechanism of CFG piles composite sub-grade is dissertated,and the mechanism of cushion also is analyzed.The main parameters such as length,diameter,bearing capacity of CFG single pile are designed;and meanwhile,settlement of the CFG pile composite sub-grade is calculated and measured.The practice shows that CFG pile composite sub-grade can be well used in this engineering and well effect is achieved.