土工基础

›› 2015, Vol. 29 ›› Issue (4): 57-60.

• 工程实录 • 上一篇    下一篇

高承台群桩基础后压浆承载特性分析

邓友生，何少华   

  1. (湖北工业大学土木工程与建筑学院，武汉 430068)
  • 收稿日期:2014-08-05 出版日期:2015-08-20 发布日期:2015-11-06
  • 作者简介:邓友生(1969-)，男，博士（后），教授，研究方向为桩基础。
  • 基金资助:

    基金项目：湖北省教育厅重点项目（D20101401）

Characteristics of Post Grouted Pile Group with High Pile Caps

DENG Yousheng， HE Shaohua   

  1. (School of Civil Engineering & Architecture, Hubei University of Technology, Wuhan 430068)
  • Received:2014-08-05 Online:2015-08-20 Published:2015-11-06

摘要： 以国内某跨海公路桥超大规模群桩基础建设工程为背景，运用大型有限元分析软件ADINA分别建立了压浆前后9根群桩基础与土体相互作用的三维有限元模型，研究了群桩基础注浆前后荷载沉降特性，桩顶、桩身轴力分布以及轴力与位移等问题。结果表明：桩端注浆可以减小群桩沉降约44.3%，加固效果显著，并且能改善群桩中角桩和边桩的受力状况，提高群桩基础整体承载性能。

关键词: 钻孔灌注桩, 后压浆, 群桩, 数值模拟, 承载特性

Abstract: This paper presents the numerical analysis of the post grouted pile groups in a marine highway bridge project by using software ADINA. The three-dimensional finite element models were used to analyze 9 pile groups before and after the post grout treatment. The load transfer characteristics of the pile, axial stresses in the pile and within the pile group as well as the displacement of the pile group are evaluated. The results indicates that, the post grouted pile can reduce the pile group settlement by 44.3% as well as improve the stress distribution.

Key words: Cast-In-Place Concrete Piles, Post Grouted Piles, Piles Groups, Numerical Analysis, Bearing Capacity Characteristics