邻近桩基受隧道开挖影响的多因素三维有限元分析

韩进宝; 熊巨华; 孙庆; 杨敏

邻近桩基受隧道开挖影响的多因素三维有限元分析 English Version

韩进宝^1,2,,
熊巨华^1,2,
孙庆^1,2,
杨敏^1,2

1.同济大学岩土及地下工程教育部重点实验室,上海 200092 ； 2. 同济大学地下建筑与工程系,上海 200092

详细信息

作者简介:
韩进宝 (1985 – ) ,男,河北石家庄人,硕士研究生,从事岩土工程方面的研究。

中图分类号: TU473
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出版历程
- 收稿日期: 2011-08-07
- 发布日期: 2011-12-06

Multi-factor three-dimensional finite element analysis of effects of tunnel construction on adjacent pile foundation

HAN Jin-bao^1,2,,
XIONG Ju-hua^1,2,
SUN Qing^1,2,
YANG Min^1,2

1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China

摘要

摘要: 建立了邻近桩基受隧道开挖影响的位移控制（ DCM ）三维有限元数值分析模型,通过与离心机实验结果的对比,验证了该数值模型的有效性。在此基础上进行了一系列的参数模拟试验,结果表明：桩基内力和变形都随桩长与隧道的埋深比的增大而减小,但弯矩的降幅不明显；桩的轴力、侧向变形、沉降以及弯矩都随隧道与桩水平距离 X_pile 的增大而减小；桩身的最大弯矩和最大轴力都随地层损失比的增大而增大。桩身内力和变形随着土体固结的完成而逐渐增大,轴力和弯矩分别增加约 1 倍和 2 倍,工程中应考虑隧道开挖对桩基的长期影响。
- DCM /
- 隧道开挖 /
- 桩基 /
- 有限元分析
Abstract: Using the displacement control method (DCM), a three-dimensional finite element model is established to analyze the effects of tunnel construction on the adjacent pile foundation, and the effectiveness of this three-dimensional model is demonstrated through the back analysis of centrifuge tests. Based on these, parametric studies are implemented. The results of numerical simulations show that the internal force and deformation of tunneling-induced pile depend mainly on the pile-tunnel distance X_pile, pile length to tunnel depth ratio L_p /H_tun and volume loss V_L . The internal force and deformation decrease with the incense of L_p /H_tun, but the bending moment is not significantly affected. With the increase of X_pile the axial force and lateral deformation of the pile and settlement and bending moment all decrease, both the maximum bending moment and the maximum axial force of the pile increase with the increase of V_L, when V_L =3.3%, the internal force and deformation of the pile double or treble those after the consolidation of the soil, and the tunneling-induced long-term behavior of the pile should be considered in the tunnel design and construction.
- DCM /
- tunneling /
- pile foundation /
- finite element analysis

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参考文献(18)

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邻近桩基受隧道开挖影响的多因素三维有限元分析 English Version

作者简介: 韩进宝 (1985 – ) ,男,河北石家庄人,硕士研究生,从事岩土工程方面的研究。

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Multi-factor three-dimensional finite element analysis of effects of tunnel construction on adjacent pile foundation

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作者简介:
韩进宝 (1985 – ) ,男,河北石家庄人,硕士研究生,从事岩土工程方面的研究。