Three-dimensional numerical simulation of influences of ground subsidence on composite foundation

XIA Li-nong; MIAO Yun-dong; LIAO Chang-bin

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Three-dimensional numerical simulation of influences of ground subsidence on composite foundation

更新时间：2026-06-25

- Three-dimensional numerical simulation of influences of ground subsidence on composite foundation
- Vol. 33, Issue 4, (2012)
- 作者机构：
  
  1. 长沙学院土木工程系,长沙,410003
  2. 湘潭大学土木工程与力学学院,湖南,湘潭,411105
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU478
- Online First：26 April 2012，
  
  Published：2012
- 稿件说明：
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XIA Li-nong, MIAO Yun-dong, LIAO Chang-bin. Three-dimensional numerical simulation of influences of ground subsidence on composite foundation[J]. 2012, 33(4).
DOI：

XIA Li-nong, MIAO Yun-dong, LIAO Chang-bin. Three-dimensional numerical simulation of influences of ground subsidence on composite foundation[J]. 2012, 33(4). DOI：

摘要

通过对复合地基在正常使用条件下和地基土沉降后的三维数值模拟，研究了复合地基由地下水位下降引起的地基土沉陷后的沉降、桩体摩阻力分布和桩身轴力分布的变化。分析表明：随着地基土沉降的增加，加固桩体和基础的沉降加大，中性点位置逐渐下降，桩身轴力有所增大；在加强桩中，中心桩的中性点最低，边桩次之，角桩最高；随着地基土沉降的增加，各桩中性点位置差异逐渐减小，桩体上部负摩阻力作用的桩身长度更长，负摩阻力值逐渐增大。

Abstract

Based on three-dimensional numerical simulations of composite foundation both on the condition of ordinary use and ground subsidence

changes of settlement

skin friction distribution and axial force of pile in composite foundation after ground subsidence induced by groundwater level lowering are analyzed. It is shown that

settlement of reinforced pile and foundation increases

and neutral point in pile moves down gradually

axial forces in reinforced pile increase gradually along with ground subsidence increasing. In reinforced piles of composite foundation

neutral point in centre pile is the lowest

neutral point in border pile is the second

neutral point in corner pile is the highest. Along with ground subsidence increasing

the differences of neutral point position in centre pile

border pile and corner pile decrease gradually

the length impacted by negative skin friction of upper part pile over neutral point lengthens gradually

value of negative skin friction increases gradually.

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