| 考虑基坑开挖影响的群桩基础竖向承载性状数值分析 |
| |
| 引用本文： | 王成华,刘庆晨.考虑基坑开挖影响的群桩基础竖向承载性状数值分析[J].岩土力学,2012,33(6):1851-1856. |
| |
| 作者姓名： | 王成华 刘庆晨 |
| |
| 作者单位： | 天津大学 建筑工程学院，天津 300072 |
| |
| 基金项目： | 国家自然科学基金资助(No.50978182) |
| |
| 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。
|
| 关 键 词： | 基坑开挖 桩筏基础 三维有限元分析 ABAQUS |
| 收稿时间： | 2010-12-13 |
Numerical analysis of vertical bearing behavior of group pile foundation considering pit excavation effect |
| |
| WANG Cheng-hua
,
LIU Qing-chen.Numerical analysis of vertical bearing behavior of group pile foundation considering pit excavation effect[J].Rock and Soil Mechanics,2012,33(6):1851-1856. |
| |
| Authors: | WANG Cheng-hua LIU Qing-chen |
| |
| Institution: | School of Civil Engineering, Tianjin University, Tianjin 300072, China |
| |
| 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. |
| |
| Keywords: | pit excavation piled raft foundation 3D finite element analysis ABAQUS |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
