CFG桩复合地基沉降计算是工程设计的关键,也是亟待改进、完善的重要课题。依据34个楼座CFG桩复合地基实测沉降数据反演分析,结合规范理论计算方法,建立桩间土平均应力计算公式,提出一种新的CFG桩复合地基沉降方法。同时,根据实测沉降数据反算得出的复合区压缩模量,与规范计算得到复合区压缩模量进行对比,结果表明:实际复合区的压缩模量是规范法复合区压缩模量的2.6倍。 The settlement calculation of CFG pile composite foundation is the key of engineering design, and it is also an important subject to be improved and perfected urgently. Based on the back analysis of measured settlement data of CFG pile composite foundation in 34 buildings and combining with the theoretical calculation method, the formula of average soil stress between piles was established and a new settlement method of CFG pile composite foundation was proposed. At the same time, the compressive modulus of the composite zone obtained from the inverse analysis of measured settlement data is compared with the calculated compressive modulus of the composite zone. The results show that the compressive modulus of the composite zone is 2.6 times of the compressive modulus of the composite zone.