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重载堆场桩网复合地基离心模型试验与数值模拟研究

李威, 周春儿, 吴加武, 董华钢, 任红磊

李威, 周春儿, 吴加武, 董华钢, 任红磊. 重载堆场桩网复合地基离心模型试验与数值模拟研究[J]. 岩土工程学报, 2022, 44(S2): 71-75. DOI: 10.11779/CJGE2022S2016
引用本文: 李威, 周春儿, 吴加武, 董华钢, 任红磊. 重载堆场桩网复合地基离心模型试验与数值模拟研究[J]. 岩土工程学报, 2022, 44(S2): 71-75. DOI: 10.11779/CJGE2022S2016
LI Wei, ZHOU Chun-er, WU Jia-wu, DONG Hua-gang, REN Hong-lei. Centrifugal model tests and numerical simulations of pile-net composite foundation for heavy-load storage yard[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(S2): 71-75. DOI: 10.11779/CJGE2022S2016
Citation: LI Wei, ZHOU Chun-er, WU Jia-wu, DONG Hua-gang, REN Hong-lei. Centrifugal model tests and numerical simulations of pile-net composite foundation for heavy-load storage yard[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(S2): 71-75. DOI: 10.11779/CJGE2022S2016

重载堆场桩网复合地基离心模型试验与数值模拟研究  English Version

基金项目: 

中央高校基本科研业务费专项项目 Y321002

江苏水利科技项目 2018019

详细信息
    作者简介:

    李威(1994—),男,硕士,工程师,主要从事岩土工程数值模拟等方面的研究工作。E-mail:liwei@nhri.cn

    通讯作者:

    任红磊, E-mail: 1987766238@qq.com

  • 中图分类号: TU472

Centrifugal model tests and numerical simulations of pile-net composite foundation for heavy-load storage yard

  • 摘要: 以某码头重载堆场CFG桩网复合地基为研究背景,开展离心模型试验及三维数值模拟计算,研究重载作用下桩网复合地基变形及受力特性。结果表明:离心模型及数值模拟得出的地基变形、桩顶轴力、孔隙水压力及桩土应力比结果具有较好的一致性,两种方法可互为补充验证;重载作用下,桩网复合地基发生的位移以竖向沉降分量为主,水平位移分量较小,位移变化速率满足堆场稳定性控制要求;复合地基中桩土应力比介于20~40之间,CFG桩分担了一半以上的上覆堆场荷载,发挥了极其关键的荷载分担作用。
    Abstract: Based on the research background of pile-net composite foundation of the heavy-load storage yard of a wharf, the centrifugal model tests and three-dimensional numerical simulations are carried out to study the deformation and stress characteristics of the pile-net composite foundation under heavy loads. The results show that the values of foundation deformation, axial force at pile top, pore water pressure and pile-soil stress ratio obtained by the centrifugal model and numerical simulation are in good agreement, and the two methods can be complemented and verified for each other. Under the heavy loads, the displacement of the pile-net composite foundation is mainly the vertical settlement component, and the horizontal displacement component is small. The change rate of displacement meets the control requirements of yard stability.The pile-soil stress ratio in the composite foundation is between 20 and 40, and the CFG piles share more than half of the loads of the overlying storage yard, playing a key role in load sharing.
  • 图  1   复合地基剖面图

    Figure  1.   Profile of composite foundation

    图  2   模型布置图

    Figure  2.   Layout of model

    图  3   有限元模型

    Figure  3.   Finite element model

    图  4   加载过程线

    Figure  4.   Curves of loading process

    图  5   沉降等值线图

    Figure  5.   Contours of settlement

    图  6   各测点沉降过程线

    Figure  6.   Development curves of settlement

    图  7   水平位移等值线图

    Figure  7.   Contours of horizontal displacement

    图  8   各测点水平位移过程线

    Figure  8.   Development curves of horizontal displacement

    图  9   孔隙水压力发展过程曲线

    Figure  9.   Development curves of pore water pressure

    图  10   桩顶轴力发展过程曲线

    Figure  10.   Development curve of axial force at pile tip

    图  11   桩土应力比分布

    Figure  11.   Distribution of pile-soil stress ratio

    表  1   土的计算参数

    Table  1   Parameters of soils

    土层参数 K n Rf c/kPa φc/(°) Kur/K cd nd Rd CFG桩
    复合垫层 400.0 0.300 0.70 25.0 0.0 3.5 0.005 0.67 0.69 γ=24 kN/m3,
    E=30 GPa, ν=0.2
    素填土①2 186.2 0.794 0.70 25.1 18.7 4.0 0.010 0.60 0.69
    淤泥质黏土②1 87.6 0.832 0.80 9.9 12.2 5.0 0.040 0.80 0.69
    粉质黏土③4 250.0 0.700 0.70 27.2 17.7 4.0 0.005 0.58 0.69 土工格栅
    中粗砂③2 250.0 0.700 0.70 0.0 30.0 4.0 0.005 0.58 0.69 J2%=210 kN/m, E=2 GPa, ν=0.3
    黏土④1 110.0 0.809 0.75 32.6 14.8 8.0 0.025 0.75 0.69
    黏土④2 136.2 0.794 0.70 32.6 14.8 8.0 0.020 0.75 0.69
    下载: 导出CSV
  • [1] 阎明礼, 张东刚. CFG桩复合地基技术及工程实践[M]. 北京: 中国水利水电出版社, 2001.

    YAN Ming-li, ZHANG Dong-gang. CFG Pile Composite Foundation Technology and Engineering Practice[M]. Beijing: China Water & Power Press, 2001. (in Chinese)

    [2] 何宁, 娄炎, 娄斌. CFG桩复合地基加固桥头深厚软基[J]. 水利水运工程学报, 2010(4): 89–94. https://www.cnki.com.cn/Article/CJFDTOTAL-SLSY201004018.htm

    HE Ning, LOU Yan, LOU Bin. Improvement of deep and thick soft foundation at the end of a bridge by using CFG pile composite foundation[J]. Hydro-Science and Engineering, 2010(4): 89–94. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-SLSY201004018.htm

    [3] 蔡正银, 徐光明. 港口工程离心模拟技术[M]. 北京: 科学出版社, 2020.

    CAI Zheng-yin, XU Guang-ming. Centrifugal Simulation Technology of Port Engineering[M]. Beijing: Science Press, 2020. (in Chinese)

    [4] 顾行文, 谭祥韶, 黄炜旺, 等. 倾斜软土CFG桩复合地基上的路堤破坏模式研究[J]. 岩土工程学报, 2017, 39(增刊1): 111–115. doi: 10.11779/CJGE2017S1022

    GU Xing-wen, TAN Xiang-shao, HUANG Wei-wang, et al. Failure mechanisms of embankment on inclined soft foundation reinforced by CFG Piles[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(S1): 111–115. (in Chinese) doi: 10.11779/CJGE2017S1022

    [5] 张树明, 蒋关鲁, 廖祎来, 等. 加固范围及边坡坡率对CFG桩–网复合地基受力变形特性影响分析[J]. 岩石力学与工程学报, 2019, 38(1): 192–202. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201901016.htm

    ZHANG Shu-ming, JIANG Guan-lu, LIAO Yi-lai, et al. Effect of the strengthening area and the slope rate on bearing and deforming behaviors of CFG pile-geogrid composite foundations[J]. Chinese Journal of Rock Mechanics and Engineering, 2019, 38(1): 192–202. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201901016.htm

    [6] 姜彦彬, 何宁, 林志强, 等. 路堤深厚软基管桩复合地基数值模拟[J]. 水利水运工程学报, 2018(2): 43–51. https://www.cnki.com.cn/Article/CJFDTOTAL-SLSY201802006.htm

    JIANG Yan-bin, HE Ning, LIN Zhi-qiang, et al. Numerical simulation of pipe pile composite foundation of deep soft foundation under embankment[J]. Hydro-Science and Engineering, 2018(2): 43–51. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-SLSY201802006.htm

    [7] 姜彦彬, 何宁, 何斌, 等. 复合地基离心模型试验桩土应力分布测试分析[J]. 岩土工程学报, 2020, 42(增刊1): 85–89. doi: 10.11779/CJGE2020S1017

    JIANG Yan-bin, HE Ning, HE Bin, et al. Distribution of pile-soil stress in centrifugal modelling of composite foundation[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(S1): 85–89. (in Chinese) doi: 10.11779/CJGE2020S1017

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出版历程
  • 收稿日期:  2022-12-07
  • 网络出版日期:  2023-03-26
  • 刊出日期:  2022-11-30

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