摘要
扩顶CFG桩复合地基是在常规CFG桩复合地基基础上发展起来的一种新的地基处理形式,利用了扩顶的荷载收集效应,充分发挥桩体高承载力的优势及桩间土的承载和变形协调能力。本文简要介绍了扩顶CFG桩复合地基的作用机理及油罐地基处理的要求和特点。针对江苏某大型油罐基底为淤泥质软土的特殊情况,采用"山皮石桩+CFG桩+桩帽+加筋垫层"的复合形式,桩帽和加筋垫层的共同作用,充分发挥桩体高承载力的优势,创造性的将山皮石桩+扩顶CFG桩的多桩型复合地基处理方式应用于大型油罐地基处理中,为大型油罐软土地基处理提供了一种新的思路。
The top-extended CFG pile composite foundation is a new foundation treatment technique based on the conventional CFG pile composite foundation. It can make full use of the “load collecting” function and high bearing capacity of top-extended piles, and the bearing capacity and the deformation compatibility of soil between piles. This paper introduces the mechanism of the top- extended CFG pile composite foundation and the requirements and characteristics of oil tank foundation treatment. According to the foundation for silt soil of a large oil tank in Jiangsu province, it can give full play to the advantages of high bearing capacity of CFG pile, using the “gravel pile ＋ CFG pile ＋ pile cap ＋ reinforced cushion”compound form, as well as pile caps and reinforced cushion worked together. The gravel pile and top-extended CFG pile composite foundation is creatively applied to the foundation treatment of large oil tanks and provides new thinking for vhe soft soil foundation treatment of large oil tanks.
出处
《建筑科学》
北大核心
2013年第1期71-74,共4页
Building Science
关键词
扩顶CFG桩
复合地基
大型油罐
加筋垫层
top-extended CFG pile
composite foundation
large oil tank
reinforced cushion
