高速公路CFG桩复合地基设计与工程应用研究

以江西省环鄱阳湖区域德昌高速公路软基施工为工程背景，对CFG桩复合地基设计参数进行了分析计算确定，采用控制工后沉降的理论进行了设计，并对软基在路堤加载过程及工后沉降进行了跟踪监测。监测结果表明:理论计算值与实际监测值吻合较好，软基加固效果显著，说明该CFG桩复合地基设计计算方法适用于对德昌高速公路软基处理，满足工程的要求。为环鄱阳湖软土地区修建高速公路软基加固设计提供了参考。

Study on Highway CFG Pile Composite Foundation Design and Its Engineering Application

Taking the soft foundation construction of Dexing-Nanchang Highway in Poyang Lake area of Jiangxi Province as the engineering background，the design parameters of CFG pile composite foundation are studied and specified. Then the design is carried out according to the theory of post-construction settlement control and the soft foundation is traced and monitored during embankment loading and post-construction settling. The results show that the theoretical values calculated are very close to the actual data monitored and the reinforcement effect is outstanding，proving the design calculation of CFG composite foundation suitable for the soft foundation treatment for Dexing-Nanchang Highway，meeting the engineering requirement and offering reference to soft foundation reinforcement in soft soil area surrounding Poyang Lake.