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Deformation and Force Numerical Analysis of Deep Foundation Pit in Soil-Rock Dualistic Stratum

Received: 11 December 2018     Published: 12 December 2018
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Abstract

Based on the finite element calculation software Plaxis, the numerical simulation of the deep foundation pit of the Nanjing Metro Engineering Second-Bridge-Park Station was carried out. The calculation results were in good agreement with the monitoring values of the surface settlement 5m away from the foundation pit as well as two typical horizontal displacement of the pile, indicating the reliability of the model. The model was used to analyze the soil deformation, surface settlement, pile displacement and pile stress in the soil-rock combination stratum. The results showed that the pile deformation mainly occured in the soil part in the deep foundation pit of soil and rock combination stratum. Moreover, the maximum displacement was below the middle part of the soil part; the maximum surface settlement was located 0.35H away from the pile (H was of excavation depth); the sudden change of the pile body was basically at the boundary between the soil and the rock as well as the bottom part of the pit, which showed that the deformation of the foundation pit of the soil-rock combination stratum was closely related to the thickness of the soil layer and the excavation depth of the foundation pit. Numerical simulation using Plaxis software could provide a proof for the design and construction of foundation pits.

Published in Science Discovery (Volume 6, Issue 6)
DOI 10.11648/j.sd.20180606.31
Page(s) 506-513
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2018. Published by Science Publishing Group

Keywords

Soil-Rock Dualistic Stratum, Deep Excavation, Finite Element Method, Deformation of Foundation Pit, Force of Foundation Pit

References
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[3] 王惠民, 戢贞建, 王勇,等. 深基坑中内支撑对支护桩的影响分析[J]. 低温建筑技术, 2017, 39(4):78-81。
[4] 刘红军, 李东, 孙涛,等. 二元结构岩土基坑"吊脚桩"支护设计数值分析[J]. 土木建筑与环境工程, 2009, 31(5):43-48。
[5] Long M. Database for Retaining Wall and Ground Movements due to Deep Excavations[J]. Journal of Geotechnical & Geoenvironmental Engineering, 2001, 127(3):203-224.
[6] 施有志, 林树枝, 赵花丽. 地铁深基坑开挖效应土体小应变参数敏感性分析——以厦门地区为例[J]. 工程地质学报, 2016, 24(6):1294-1301。
[7] 乔亚飞, 丁文其, 王军,等. 无锡地区地铁车站深基坑变形特性[J]. 岩土工程学报, 2012, 34(s1):761-766。
[8] 刘红军, 孙玺, 姜德鸿. “二元”基坑中内支撑支护结构的三维数值分析与监测[J]. 中国海洋大学学报(自然科学版), 2012, 42(9):81-87。
[9] 刘红军, 于雅琼, 王秀海. 土岩组合地层旋喷桩止水桩锚支护基坑变形与受力数值分析[J]. 岩土工程学报, 2012, 34(s1):297-302。
[10] Briaud J L, Lim Y. Tieback Walls in Sand: Numerical Simulation and Design Implications[J]. Journal of Geotechnical & Geoenvironmental Engineering, 1999, 125(2):101-110.
[11] Wang S, Ling X, Song X, et al. Diaphragm wall deformation behaviors analysis of deep excavation in soft soil metro station[C]// International Conference on Electric Technology and Civil Engineering. IEEE, 2011:5856-5859.
[12] 刘红军, 王亚军, 姜德鸿,等. 土岩组合双排吊脚桩桩锚支护基坑变形数值分析[J]. 岩石力学与工程学报, 2011(s2):4099-4103。
[13] 刘红军, 翟桂林, 郑建国. 土岩组合地层加锚双排桩基坑支护结构数值分析[J]. 岩土工程学报, 2012, 34(s1):103-107。
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Cite This Article
  • APA Style

    Guo Kang, Huang Cong, Zhang Huang, Ding Jianwen. (2018). Deformation and Force Numerical Analysis of Deep Foundation Pit in Soil-Rock Dualistic Stratum. Science Discovery, 6(6), 506-513. https://doi.org/10.11648/j.sd.20180606.31

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    ACS Style

    Guo Kang; Huang Cong; Zhang Huang; Ding Jianwen. Deformation and Force Numerical Analysis of Deep Foundation Pit in Soil-Rock Dualistic Stratum. Sci. Discov. 2018, 6(6), 506-513. doi: 10.11648/j.sd.20180606.31

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    AMA Style

    Guo Kang, Huang Cong, Zhang Huang, Ding Jianwen. Deformation and Force Numerical Analysis of Deep Foundation Pit in Soil-Rock Dualistic Stratum. Sci Discov. 2018;6(6):506-513. doi: 10.11648/j.sd.20180606.31

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  • @article{10.11648/j.sd.20180606.31,
      author = {Guo Kang and Huang Cong and Zhang Huang and Ding Jianwen},
      title = {Deformation and Force Numerical Analysis of Deep Foundation Pit in Soil-Rock Dualistic Stratum},
      journal = {Science Discovery},
      volume = {6},
      number = {6},
      pages = {506-513},
      doi = {10.11648/j.sd.20180606.31},
      url = {https://doi.org/10.11648/j.sd.20180606.31},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sd.20180606.31},
      abstract = {Based on the finite element calculation software Plaxis, the numerical simulation of the deep foundation pit of the Nanjing Metro Engineering Second-Bridge-Park Station was carried out. The calculation results were in good agreement with the monitoring values of the surface settlement 5m away from the foundation pit as well as two typical horizontal displacement of the pile, indicating the reliability of the model. The model was used to analyze the soil deformation, surface settlement, pile displacement and pile stress in the soil-rock combination stratum. The results showed that the pile deformation mainly occured in the soil part in the deep foundation pit of soil and rock combination stratum. Moreover, the maximum displacement was below the middle part of the soil part; the maximum surface settlement was located 0.35H away from the pile (H was of excavation depth); the sudden change of the pile body was basically at the boundary between the soil and the rock as well as the bottom part of the pit, which showed that the deformation of the foundation pit of the soil-rock combination stratum was closely related to the thickness of the soil layer and the excavation depth of the foundation pit. Numerical simulation using Plaxis software could provide a proof for the design and construction of foundation pits.},
     year = {2018}
    }
    

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  • TY  - JOUR
    T1  - Deformation and Force Numerical Analysis of Deep Foundation Pit in Soil-Rock Dualistic Stratum
    AU  - Guo Kang
    AU  - Huang Cong
    AU  - Zhang Huang
    AU  - Ding Jianwen
    Y1  - 2018/12/12
    PY  - 2018
    N1  - https://doi.org/10.11648/j.sd.20180606.31
    DO  - 10.11648/j.sd.20180606.31
    T2  - Science Discovery
    JF  - Science Discovery
    JO  - Science Discovery
    SP  - 506
    EP  - 513
    PB  - Science Publishing Group
    SN  - 2331-0650
    UR  - https://doi.org/10.11648/j.sd.20180606.31
    AB  - Based on the finite element calculation software Plaxis, the numerical simulation of the deep foundation pit of the Nanjing Metro Engineering Second-Bridge-Park Station was carried out. The calculation results were in good agreement with the monitoring values of the surface settlement 5m away from the foundation pit as well as two typical horizontal displacement of the pile, indicating the reliability of the model. The model was used to analyze the soil deformation, surface settlement, pile displacement and pile stress in the soil-rock combination stratum. The results showed that the pile deformation mainly occured in the soil part in the deep foundation pit of soil and rock combination stratum. Moreover, the maximum displacement was below the middle part of the soil part; the maximum surface settlement was located 0.35H away from the pile (H was of excavation depth); the sudden change of the pile body was basically at the boundary between the soil and the rock as well as the bottom part of the pit, which showed that the deformation of the foundation pit of the soil-rock combination stratum was closely related to the thickness of the soil layer and the excavation depth of the foundation pit. Numerical simulation using Plaxis software could provide a proof for the design and construction of foundation pits.
    VL  - 6
    IS  - 6
    ER  - 

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Author Information
  • School of Transportation, Southeast of University, Nanjing, China

  • School of Transportation, Southeast of University, Nanjing, China

  • School of Transportation, Southeast of University, Nanjing, China

  • School of Transportation, Southeast of University, Nanjing, China

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