| 软土地区开挖过程对立柱桩的影响分析 |
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| 引用本文： | 陈明,李镜培.软土地区开挖过程对立柱桩的影响分析[J].路基工程,2013,0(4):85-88. |
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| 作者姓名： | 陈明 李镜培 |
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| 作者单位： | 1.同济大学，上海 200092 |
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| 摘 要： | 立柱桩对软土地区基坑工程的稳定性有重要影响。以陆家嘴塘东中块总部基地的基坑工程为背景，基于快速拉格朗日法（FLAC3D），考虑桩土之间的相对滑移作用，深入分析了软土地区开挖条件下不同布桩方式对立柱桩的桩身拉力、最大拉力位置及桩顶回弹量等的影响。结果表明:开挖对立柱桩的影响有明显的空间效应，开挖对中心桩的影响最大，角桩最小；开挖使立柱桩的桩身内产生了拉力，最大拉力值位置随桩数的增加而上移；桩顶回弹量随桩数的增加而减小，但当桩数增加到一定数量时，减幅将变得很小。
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| 关 键 词： | 基坑开挖 立柱桩 数值分析 空间效应 桩身拉力 桩顶回弹 |
| 收稿时间： | 2019-11-06 |
Analysis on Influence of Excavation Process in Soft Soil Area on Erect Column Piles |
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| Authors: | CHEN Ming LI Jingpei |
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| Abstract: | The erect column piles have important effect on the stability of foundation pit in soft soil area. Depending on the foundation pit engineering for Tangdong Headquarters Base of Lujiazui, the paper, with fast Lagrangian analysis of continuum (FLAC3D) and considering relative slipping between the piles and soil, made a deep analysis that on the condition of excavation in soft soil area, how different pile arrangements affect the tension force of the erect column piles, the position of maximum tension force, and rebound of the pile top. The results show that the excavation has significant spatial effect on the erect column piles, with maximum effect on the central pile and minimum effect on the corner pile; tension force arises out of the excavation inside the piles and the position of the maximum force value goes upward with the increased number of the pile; the rebound of the pile top decreases with the increased number of the pile, however, while the number increases to a certain extent, the decrement will become minor. |
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| Keywords: | foundation pit excavation erect column pile numerical analysis spatial effect tension force of pile rebound of pile top |
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