东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (6): 871-874.DOI: 10.12068/j.issn.1005-3026.2014.06.025

• 资源与土木工程 • 上一篇    下一篇

基于两阶段法地铁盾构开挖对邻近桩基影响分析

王述红，赵贺兴，姜磊，李振涛   

  1. (东北大学 资源与土木工程学院， 辽宁 沈阳110819)
  • 收稿日期:2013-07-20 修回日期:2013-07-20 出版日期:2014-06-15 发布日期:2014-04-11
  • 通讯作者: 王述红
  • 作者简介:王述红(1969-)，男，江苏泰州人，东北大学教授.
  • 基金资助:
    国家自然科学基金资助项目(51179031，51074042)；国家自然科学基金外国青年学者研究基金资助项目(51250110531，513111173)；国家重点基础研究发展计划项目(2013CB227902)；地质灾害防治与地质环境保护国家重点实验室资助项目(SKLGP2012K009)；深部岩土力学与地下工程国家重点实验室资助项目(SKLGDUEK1009)；中央高校基本科研业务费专项资金资助项目(N120101001).

Analysis of the Impact on Adjacent Pile Caused by Excavation with Metro Shield Based on TwoStage Method

WANG Shuhong， ZHAO Hexing， JIANG Lei， LI Zhentao   

  1. School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China.
  • Received:2013-07-20 Revised:2013-07-20 Online:2014-06-15 Published:2014-04-11
  • Contact: WANG Shuhong
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摘要： 在两阶段分析法的基础上，根据Winkler地基模型的理论将桩体划分成若干段长度相等的微元体，按照承载桩竖向荷载传递规律，并考虑桩体的端承作用，提出一种计算盾构隧道开挖对邻近桩基影响的理论方法.通过计算表明，桩体的沉降随桩基埋深变化较小，附加轴力随桩基埋深呈先增大后减小的趋势，最大附加轴力发生在隧道轴线附近.并将结果与Klar使用的变形微分方程的计算结果进行比较，验证了此方法的准确性.此外，桩基的附加轴力和沉降随水平距离的增大而急剧减小，当水平距离超过4R时，隧道开挖对桩基的影响可以忽略.

关键词: 盾构, 两阶段法, Winkler地基模型, 桩基, 影响分析

Abstract: Based on twostage method， a new theoretical method which was used to analyze the impact of adjacent piles when the tunnels were excavated with metro shield was proposed. In this method Winkler model was used to divide the pile into same pieces of micro units， and the effect of end bearing pile was taken into consideration according to the transfer of vertical load. The calculation results showed that the vertical settlement of the pile changed slowly with the depth of the pile， and the additional axial force increased first and then decreased with depth of the pile. The maximum additional axial force occurred in the depth close to the tunnel axis. In order to verify the accuracy of this method， the calculation results were compared with those analyzed by Klar using deformation differential equations. In addition， the additional axial force and pile settlement decreased rapidly with increasing horizontal distance. When the horizontal distance exceeded 4R， the impact of tunnel excavation on the pile can be ignored.

Key words: shield, twostage method, Winkler model, pile, impact analysis

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