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力学与实践 ›› 2008, Vol. 30 ›› Issue (6): 60-63.doi: 10.6052/1000-0992-2007-481

• 应用研究 • 上一篇    下一篇

变刚度群桩基础沉降计算研究

钱晓丽   

  1. 福建工程学院土木工程系
  • 收稿日期:2007-10-26 修回日期:2008-05-05 出版日期:2008-12-08 发布日期:2008-12-08

DISPLACEMENT CALCULATION FOR PILE GROUP OF VARYING RIGIDITY UNDER AXIAL LOADING

  • Received:2007-10-26 Revised:2008-05-05 Online:2008-12-08 Published:2008-12-08

摘要: 针对现行规范《建筑桩基技术规范》(JGJ94-94)无法计算变刚度群桩基础沉降的现状, 在前人建立单桩柔度矩阵的基础上,推导出变刚度两根桩、三根桩乃至群桩的沉降计算理论 半解析解. 并以均布9桩、变桩长9桩为例,计算其桩顶柔度系数的变化趋势. 结果表明, 中桩长、边桩次之、角桩短的变刚度群桩基础具有减小差异沉降的功能. 该方法对中国制定变刚 度群桩基础技术规范具有借鉴意义.

关键词: 变刚度群桩, 柔度系数, 沉降计算, 半解析解

Abstract: On the basis of flexibility matrix in a single pile, a formula for calculating the settlement of a pile group of varying rigidity is derived to complement ``Technical Code for Building Pile foundations''. Comparing with the results for uniform piles, it is shown that piles of varying rigidity can reduce differential settlement. The method can be used for reference in drawing new code.

Key words: varying rigidity pile group, flexibility