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    双层砂井地基大变形固结方程差分解

    张明, 赵有明, 刘国楠, 胡荣华

    张明, 赵有明, 刘国楠, 胡荣华. 双层砂井地基大变形固结方程差分解[J]. 岩土工程学报, 2013, 35(9): 1666-1674.
    引用本文: 张明, 赵有明, 刘国楠, 胡荣华. 双层砂井地基大变形固结方程差分解[J]. 岩土工程学报, 2013, 35(9): 1666-1674.
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    ZHANG Ming, ZHAO You-ming, LIU Guo-nan, HU Rong-hua. Finite difference solution to equation for large-strain consolidation of double-layered vertical drain ground[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(9): 1666-1674.
    Citation: ZHANG Ming, ZHAO You-ming, LIU Guo-nan, HU Rong-hua. Finite difference solution to equation for large-strain consolidation of double-layered vertical drain ground[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(9): 1666-1674.
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    双层砂井地基大变形固结方程差分解  English Version

    • 1. 河南工程学院土木工程学院，河南 郑州 451191; 2. 中国铁道科学研究院，北京 100081; 3. 深圳市房地产评估发展中心，广东 深圳 518034

    基金项目: 河南工程学院博士基金项目（D2012007）
    详细信息
      作者简介:

      张 明(1979- )，男，湖北京山人，博士，副教授，主要从事软土固结理论与计算方法等方面的研究与教学工作。E-mail: honest-2003@163.com。

    • 中图分类号: TU447

    Finite difference solution to equation for large-strain consolidation of double-layered vertical drain ground

    • 1. Institute of Civil Engineering, Henan Institute of Engineering, Zhengzhou 451191, China; 2. China Academy of Railway Sciences, Beijing 100081, China; 3. Center for Assessment and Development of Realestate of Shenzhen, Shenzhen 518034, China

    摘要

      摘要
    • 摘要: 基于砂井地基轴对称大变形固结控制方程，综合考虑双层砂井地基软土的压缩性与渗透性非线性幂函数变化、分级加荷、径向与竖向同时渗流排水、初始超静孔压几种分布模式等实际条件，采用交替方向隐式（ADI）差分法编程求解了建立的双层砂井地基大变形固结控制方程，通过算例分析验证了建立的方程与差分解法及编制程序的合理性。将本文方法应用于围海造陆工程吹填淤泥与海相沉积淤泥组成的双层砂井地基固结计算，预测的固结沉降过程较经典固结理论更接近于实测值，对双层砂井地基固结沉降过程预测进行了有益的探讨。
      Abstract: Based on the governing equation for axisymmetric large-strain consolidation of vertical drain ground, some actual conditions are considered for double-layered sand drain ground, including nonlinear and power function variation of compressibility and permeability of soft clay, stage loading, radial and vertical drainage conditions and several kinds of distribution modes of the initial excess pore pressure. An equation for large-strain consolidation of double-layered vertical drain ground is established, and the alternation direction implicit (ADI) method of finite difference method is adopted to solve the governing equation by means of the computing program. The rationality of the established equation, the finite difference method solution and the computing program are verified through a case study. Compared with the classical consolidation theory, the consolidation settlement process of double-layered vertical sand ground of dredged fill and marine deposit silt in reclamation land projects obtained by the proposed method based on the observed data is more reasonable. A beneficial discussion of predicting the consolidation settlement process of the double-layered vertical sand ground is performed.
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      • 参考文献(13)
    • [1] 郑 辉, 谢康和, 杨晓强. 双层饱和软土地基一维大应变 固结研究[J]. 岩土力学, 2004, 25(11): 1770-1774. (ZHENG Hui, XIE Kang-he, YANG Xiao-qiang. Study of one dimensional large strain consolidation of double-layered saturated soft soils[J]. Rock and Soil Mechanics, 2004, 25(11): 1770-1774. (in Chinese))
      [2] 江辉煌, 赵有明, 刘国楠, 等. 砂井地基的大变形固结[J]. 岩土工程学报, 2011, 33(2): 302-308. (JIANG Hui-huang, ZHAO You-ming, LIU Guo-nan, et al. Large strain consolidation of soft ground with vertical drains[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(2): 302-308. (in Chinese))
      [3] 江辉煌. 砂井处理超软地基的固结计算[D]. 北京: 中国铁道科学研究院, 2009. (JIANG Hui-huang. Consolidation calculation of super-soft ground with vertical drains[D]. Beijing: China Academy of Railway Sciences, 2009. (in Chinese))
      [4] 张 明. 深圳前湾吹填淤泥固结性状研究[D]. 北京: 中国铁道科学研究院, 2010. (ZAHNG Ming. Study of the consolidation behaviors of dredged fill in the Qianwan Area Shenzhen[D]. Beijing: China Academy of Railway Sciences, 2010. (in Chinese))
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      [7] DOUGLAS J, DUPONT T. Alternating-direction Galerkin Methods on Rectangle[C]// Proc Symposium on Numerical Solution of Paritial Differential Quation. New York: Academic Press, 1971: 133.
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      [10] TAN T S, SCOTT R F. Finite Strain consolidation—A study of convection[J]. Soils and Foundations, 1988, 28(3): 64-74.
      [11] TOWNSEND F C, MCVAY M C. Large strain consolidation predictions[J]. Journal of Geotechnical Engineering, 1990, 2(116): 222-243.
      [12] 深圳蛇口华力工程有限公司. 招商局前湾A塘软基处理效果检测报告[R]. 深圳, 2008. (Shenzhen Huali Engineering and Construction Co., Ltd. Effect test report of soft clay foundation improvement of the A area in the Qianwan area Shenzhen[R]. Shenzhen, 2008. (in Chinese))
      [13] 《地基处理手册》编写委员会. 地基处理手册[M]. 3版.北京: 中国建筑工业出版社, 2008. (GONG Xiao-nan. Compiling Committee of Foundation Treatment Manual. Foundation treatment manual[M]. 3rd ed. Beijing: China Architecture and Building Press, 2008. (in Chinese))
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    出版历程
    • 收稿日期:  2012-10-23
    • 发布日期:  2013-09-21

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