Numerical analysis of vertical bearing behavior of group pile foundation considering pit excavation effect

WANG Cheng-hua; LIU Qing-chen

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Numerical analysis of vertical bearing behavior of group pile foundation considering pit excavation effect

更新时间：2026-06-25

- Numerical analysis of vertical bearing behavior of group pile foundation considering pit excavation effect
- Vol. 33, Issue 6, (2012)
- 作者机构：
  
  天津大学建筑工程学院,天津,300072
- 作者简介：
- 基金信息：
- DOI：
  CLC： O241
- Online First：14 June 2012，
  
  Published：2012
- 稿件说明：
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WANG Cheng-hua, LIU Qing-chen. Numerical analysis of vertical bearing behavior of group pile foundation considering pit excavation effect[J]. 2012, 33(6).
DOI：

WANG Cheng-hua, LIU Qing-chen. Numerical analysis of vertical bearing behavior of group pile foundation considering pit excavation effect[J]. 2012, 33(6). DOI：

摘要

对土体采用Mohr-Coulomb弹塑性本构模型，用接触面单元模拟桩-土相互作用，利用ABAQUS建立桩筏基础——地基——基坑开挖三维有限元分析模型。对基坑开挖影响下的群桩基础竖向承载性状进行了分析，讨论了桩顶反力分布、桩身轴力、桩侧摩阻力以及开挖引起的桩身水平位移及其弯矩的变化规律，并进行了考虑基坑开挖与不考虑基坑开挖的群桩基础竖向承载性状的对比分析。通过研究，取得了基坑开挖对高层建筑桩筏基础影响的基本认识，这些认识对于改进桩筏基础设计理论有一定的参考意义。

Abstract

The Mohr-Coulomb’s model and contact surface model are adopted to simulate the characters of soil and the interaction between pile and soil respectively; a 3D finite element model based on the interaction of piled raft foundation

soil and excavation is established by ABAQUS. It is carried out an analysis for the vertical bearing behavior of group pile foundation considering the effects of pit excavation. The changes of pile top resistance distribution

axial force of piles

lateral friction of piles

pile flexibility and moment due to excavation are discussed. The paper also compared the vertical bearing behaviors of group pile foundation considering and without considering excavation. Through this study

the basic knowledge of the effects of pit excavation on piled raft foundation for high-rise buildings are initially obtained

which would be of some referential significance for the improvement of theories for piled raft foundation design.

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