高堆石坝水力耦合模型及工程应用

    陈益峰, 胡冉, 周嵩, 周伟, 周创兵

    陈益峰, 胡冉, 周嵩, 周伟, 周创兵. 高堆石坝水力耦合模型及工程应用[J]. 岩土工程学报, 2011, 33(9): 1340-1347.
    引用本文: 陈益峰, 胡冉, 周嵩, 周伟, 周创兵. 高堆石坝水力耦合模型及工程应用[J]. 岩土工程学报, 2011, 33(9): 1340-1347.
    CHEN Yi-feng, HU Ran, ZHOU Song, ZHOU Wei, ZHOU Chuang-bing. Coupled hydromechanical model for high concrete-faced rockfill dams and its application[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(9): 1340-1347.
    Citation: CHEN Yi-feng, HU Ran, ZHOU Song, ZHOU Wei, ZHOU Chuang-bing. Coupled hydromechanical model for high concrete-faced rockfill dams and its application[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(9): 1340-1347.

    高堆石坝水力耦合模型及工程应用  English Version

    基金项目: 然科学基金项目( 51079107 );教育部新世纪优秀人才支持计划项目
    详细信息
      作者简介:

      陈益峰 (1974 – ) ,男,福建漳平人,武汉大学教授、博士生导师,从事岩土多场耦合、渗流及边坡稳定性分析研究。

    • 中图分类号: TV641

    Coupled hydromechanical model for high concrete-faced rockfill dams and its application

    • 摘要: 建立了高面板堆石坝非线性变形与非稳定渗流的水力耦合模型。该模型分别采用邓肯 <> E -<>B 模型和抛物 Signroini 型变分不等方法模拟堆石体的非线性应力变形过程和非稳定渗流过程,并通过修正的 Kozeny-Carman 模型表征堆石体的渗透特性对变形和围压的依赖关系。在面板渗透系数反演分析的基础上,应用上述模型对水布垭面板堆石坝进行了渗流–变形耦合分析。通过对数值模拟结果与实测数据的对比分析,表明因面板的绝对防渗作用,堆石体中的水力耦合效应并不显著,且上述模型可在一定程度上揭示堆石坝的渗流及变形发展趋势;但因忽略了流变、湿化、室内试验参数的尺寸效应以及非饱和渗流等,上述模型也存在较为突出的局限性。研究成果对于高面板堆石坝的水力耦合分析具有一定指导意义。
      Abstract: A coupled hydromechanical (HM) model is established for performance assessment of concrete-faced rockfill dams (CFRD). The non-linear elastic deformation of the rockfills is described by means of the Duncan-Chang’s E-B model, and the non-steady seepage flow behavior is modelled by use of the newly-developed parabolic variational inequality formulation of Signorini’s type. The Kozeny-Carman equation is calibrated to characterize the dependence of permeability of the rockfills on deformation by taking into account the effect of confining pressure. On the basis of back calculation of the permeability of the face slabs, the proposed model is employed to capture the coupled seepage flow and deformation behaviors of Shuibuya CFRD. Comparison of model predictions and in-situ measurements shows that the coupled HM effects in the rockfills are not remarkable due to the high seepage-proof performance of the face slabs, and the present model has an acceptable performance for describing the seepage and deformation behaviors. The limitations of the model are also demonstrated by examining the modeling errors, such as the negligence of the creep effect, wetting effect and size effect of the laboratory parameters of the rockfills, and the negligence of the unsaturated effect of seepage flow in the rockfills as well.
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    • 发布日期:  2011-09-14

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