CFG桩复合地基在北岗小区工程中的应用

Application of CFG Pile Composite Foundation

CFG桩由碎石、石屑、粉煤灰、水泥和水组成。采用振动沉管灌注打桩机施工 ,使 CFG桩和桩间土一起通过褥垫层形成 CFG复合地基。对其加固机理和计算方法及施工中应注意的问题作了介绍。采用 CFG桩在处理回填土、淤泥质土等软土地基 ,施工方便 ,工期短 ,具有一定的经济效益。

CFG pile is composed of gravel,stone powder,flyash,cement and water,and is installed by vibration sinking pipe method.The pile and soil combine to form a composite foundation.In this paper,the reinforcing mechanism,method of calculation and problems in construction are described.In treating soft foundation of man fill and mud,CFG piles have the advantages of easy construction,short construction period and certain economic benefits.