Research of constitutive relation of granular material and stability of pile group foundation

GAO Zi-kun; SHI Jian-yong

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Research of constitutive relation of granular material and stability of pile group foundation

更新时间：2026-06-25

- Research of constitutive relation of granular material and stability of pile group foundation
- Vol. 34, Issue 8, (2013)
- 作者机构：
  
  1. 莆田学院土木建筑工程学系,福建,莆田,351100
  2. 河海大学水利水电学院,南京,210098
  3. 河海大学岩土工程科学研究所,南京,210098
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU443
- Online First：13 August 2013，
  
  Published：2013
- 稿件说明：
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GAO Zi-kun, SHI Jian-yong. Research of constitutive relation of granular material and stability of pile group foundation[J]. 2013, 34(8).
DOI：

GAO Zi-kun, SHI Jian-yong. Research of constitutive relation of granular material and stability of pile group foundation[J]. 2013, 34(8). DOI：

摘要

天然沉积土在上覆土层重力作用下完成固结，其压缩模量大小和土层所受的前期固结压力大小直接相关。首先，分析岩土材料本构关系的主要影响因素，建立考虑模量随深度和体积应变变化的本构关系式；其次，建立桩基础稳定性问题的有限元求解格式，考虑水平荷载和下游冲刷深度对多种工况进行数值模拟分析；最后，根据计算结果，分析下游冲刷和水平荷载作用形成不对称接触边界对不同平面位置基桩受力特点，分析应力集中产生的原因及折屈失稳和整体稳定性问题。研究结果可为复杂大型工程群桩基础设计考虑桩、土及承台共同协调作用提供定量计算方法。

Abstract

For sedimentary soil which completes the consolidation due to the gravity of the overburden

the value of its modulus is directly related to the value of pre-consolidation pressure. The main factors of constitutive relation for geotechnical material are first analyzed

considering its changes with depth and volumetric strain. Secondly

pile foundation stability problem’s solving format is established for the finite element calculation

considering horizontal load and downstream scouring. Finally

based on the analytical results of the downstream erosion and contact force of different-plane-position pile due to asymmetric horizontal loads

the stress concentration and flexion instability and overall stability are analyzed for group pile foundation in large and complex engineering

considering synergism in the system of piles and soil and pile cap

so as to provide a method for quantitative calculation.

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