›› 2005, Vol. 26 ›› Issue (10): 1607-1611.

• 基础理论与实验研究 • 上一篇    下一篇

群桩荷载位移特性研究

石名磊1,战高峰2   

  1. 1.东南大学 交通学院,南京 210005;2.吉林建筑工程学院,长春 130021
  • 收稿日期:2004-10-28 出版日期:2005-10-10 发布日期:2013-12-30
  • 作者简介:石名磊,男,1962年生,博士,副教授,从事岩土工程教学与研究

On load displacement characteristics of pile group

SHI Ming-lei1, ZHAN Gao-feng2   

  1. 1.College of Transportation, Southeast University, Nanjing 210096, China; 2.Jilin Institute of Architectural and Civil Engineering, Changchun 130021, China
  • Received:2004-10-28 Online:2005-10-10 Published:2013-12-30

摘要: 将杆系结构有限单元法与荷载传递迭代法相耦合,形成一桩基沉降分析计算的混合法。采用近似解析解中Randolph and Wroth’Model与双曲线模型相结合,模拟桩身与桩周介质边界上剪切滑移的非线性。桩间相互作用在采用弹性理论Mindlin方程解答计算,并考虑了桩间“加筋与遮帘”作用。桩周土介质非均质性特征,采用指数函数模拟。分析了刚性承台下群桩桩数、桩长、桩间距和桩土模量比等群桩工作特性的影响。尤其是桩台基础沉降对群桩相互作用影响机制的研究,对桥梁拼接等对桩基础沉降要求严格的工程有重要的借鉴意义。

关键词: 群桩相互作用, 刚性承台下群桩, 群桩沉降

Abstract: One hybrid method of finite element analysis of rod structure coupling with load transfer approach for pile group settlement was established. The nonlinear behavior of shear-displacement on the boundary between pile and ground was determined by the Randolph and Wroth’ Model in the approached closed form solution, coupling with the hyperbolic model. The action of pile groups was evaluated from the Mindlin equation solution, and adjusted by the “reinforcement and curtain” action approximately. The nonhomogeneous behaviours of ground between piles is characterized with an exponential function. The influences of number of piles, the pile length, the space between piles, and the pile-soil relative stiffness factor on the characteristic of pile groups were analyzed in a systematic way. The interaction of pile group affected by the settlement of piles with rigid cap was discussed emphatically; and the results may be used for reference in the construction in which the settlement of pile group foundation is limited strictly, e.g. splicing of bridge structure.

Key words: interaction of pile group, piles with rigid cap, settlement of pile group

中图分类号: 

  • TU 473.1
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[3] 吴秋云 ,王建华 ,周杨锐 ,王 健 ,周松望 . 一种确定导管架平台群桩p-y数据的方法[J]. , 2013, 34(7): 1899-1904.
[4] 张忠苗,杨 淼,房 凯. 考虑桩身压缩的综合系数法计算超长桩基础沉降[J]. , 2012, 33(3): 793-798.
[5] 吴 鹏. 基于刚性承台群桩沉降的可靠度研究[J]. , 2007, 28(8): 1744-1748.
[6] 朱 奎,徐日庆. 层状地基群桩沉降研究[J]. , 2006, 27(S2): 870-874.
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[9] 周洪波 ,黄胜生,. 锚桩法单桩静载试验中群桩相互作用及误差分析[J]. , 2004, 25(10): 1613-1616.
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