潘旭亮^1,2，张钦喜¹，杜修力¹，张在明^1,2
(1北京工业大学建筑工程学院，北京100124;2北京市勘察设计研究院有限公司，北京100038)

[摘要] 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。
[关键词] CFG桩；地基沉降；变形计算；反演分析
中图分类号：TU473,  TU433    文献标识码：A  文章编号：1002-848X(2011) S2-0366-04

CFG pile composite ground settlement calculation method ameliorated based on field settlement data
Pan Xuliang^1,2, Zhang Qinxi¹, Du Xiuli¹, Zhang zaiming^1,2
(1 College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China; 2 Beijing Engineering Consultants Ltd., Beijing 100038, China)

Abstract: CFG pile composite ground settlement calculation is the key of project design, and is also important problem need to improve and consummate. Based on the back-analysis of the measured settlements of 34 buildings, integrating the code calculation method, building average press calculation of soil midst of piles, put a new calculation method of CFG pile composite ground settlement. Simultaneity, the compression modulus of composite area are anti-calculated by field measures data, compare to code method, result shows the former is 2.6 times than the latter.
Keywords: CFG pile; foundation settlement, settlement calculation; back-analysis