Research on 3D numerical simulation of working mechanism of CFG pile composite foundation

YANG Sheng-bin; SHAO Wei-xin; WANG Ji-yuan

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Research on 3D numerical simulation of working mechanism of CFG pile composite foundation

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- Research on 3D numerical simulation of working mechanism of CFG pile composite foundation
- Vol. 29, Issue 12, (2008)
- 作者机构：
  
  1. 中国地质大学（北京）工程技术学院,北京,100083
  2. 西北电力设计院,西安,710075
  3. 中冶地勘岩土工程总公司,北京,065201
  4. 晋城市规划设计研究院,山西,晋城,048000
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU472
- Online First：11 August 2013，
  
  Published：2008
- 稿件说明：
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YANG Sheng-bin, SHAO Wei-xin, WANG Ji-yuan. Research on 3D numerical simulation of working mechanism of CFG pile composite foundation[J]. 2008, 29(12).
DOI：

YANG Sheng-bin, SHAO Wei-xin, WANG Ji-yuan. Research on 3D numerical simulation of working mechanism of CFG pile composite foundation[J]. 2008, 29(12). DOI：

摘要

以工程应用实例为背景，运用有限差分法数值模拟方法分析了在分级加载工况下CFG桩单桩及复合地基的变形和受力特征，模拟了桩-土共同承担荷载的复合效应以及褥垫层的效用。模拟结果表明，将具有刚性桩特点的CFG桩以一定的密度置入地基土中，可以有效地提高原地基土的承载能力，桩体应力发挥主要集中在1/2桩长范围之内，适当加大桩长有助于控制地基变形，同时桩顶褥垫层的设置对于调整桩-土应力的分担起到了积极的作用，该分析方法及模拟成果对于类似工程具有一定的参考价值。

Abstract

Taking an engineering instance as background

the deformation characteristics and working mechanism of the cement flyash gravel (CFG) pile composite foundation are analysed with finite difference method; and the composite effect of the pile to work with soil and the effectiveness of cushion are also simulated. It is indicated that the bearing capacity of ground can be enhanced effectively through the CFG plies with some stiffness which are driven into the soil; the pile stress acts mainly from the top to the middle of the pile shaft; and the piles of which the lengths extended applicably can help to control the deformation of ground foundation; and the cushion is beneficial to adjust the stress distribution. The results can be for reference in similar projects.

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