土工基础

›› 2012, Vol. 26 ›› Issue (3): 36-39.

• 工程实录 • 上一篇    下一篇

堆载作用下竖向承载桩负摩阻力分析

李方振，陈志波   

  1. (福州大学环境与资源学院，福州 350108)
  • 收稿日期:2011-09-07 出版日期:2012-06-20 发布日期:2012-06-25
  • 作者简介:李方振(1985-)，男，山东菏泽人，福州大学岩土工程专业硕士研究生。
  • 基金资助:

    基金项目： 福建省自然科学基金（项目编号：2010J05094）

Analysis on Negative Skin Friction of the Vertically  Loaded Piles under the Surface Load

LI Fangzhen, CHEN Zhibo   

  1. (College of Environment and Resources, Fuzhou University, Fuzhou 350108)
  • Received:2011-09-07 Online:2012-06-20 Published:2012-06-25

摘要： 基于ADINA模拟桩土相互作用，简要分析了大面积堆载作用对竖向承载桩桩身负摩阻力、中性点位置的影响。分析结果表明，在堆载条件下,随固结时间的增长，桩基负摩阻力不断增长，且中性点位置不断变浅。随着堆载的增加，桩身承受的负摩阻力随之增加、中性点位置逐渐加深，且负摩阻力引起的桩身附加轴力也随之增大。

关键词: 堆载, 负摩阻力, 中性点, 固结, 时间效应

Abstract: Based on the finite element analysis on the soilpile interaction by using ADINA, the effect of the largearea surcharging on the negative skin friction as well as the neutral point location are evaluated. The position of the neutral point in the pile varies with the consolidation time of surrounding soil and the magnitude of the surcharging. The results also show that negative skin friction on the pile increases with the consolidation time under surcharging load.

Key words: Surcharging Load, Negative Skin Friction, Neutral Point, Consolidation, Time effect