【摘要】 基于溪洛渡水电站坝区裂隙发育特点,建立了双重介质模型,通过类比多孔介质和裂隙介质的特征,提出了裂隙率典型单元体的概念,介绍了裂隙率典型单元体体积的确定方法,即通过野外裂隙测量和统计分析,得出裂隙发育的统计规律,假设结构面为薄圆盘状、光滑平直,裂隙的空间位置采用泊松模型确定,应用Monte-Carlo原理构建随机裂隙网络模型,进一步分析裂隙率随体积变化的关系,得出研究区裂隙率典型单元体体积为4 913m3(17m×17m×17m)。该体积与研究区的范围相比小得多,能很好也反映出研究区的总体裂隙渗流规律。更多还原

【Abstract】 A dual media model reflecting the fissure development in the dam area of the Xiluodu Hydropower Station is developed.The concept of the representative elementary volume of fractured rate is proposed by comparison of the characteristics of porous media and fissured media,and the method for its determination is given.Then,the regularity of fissure development is studied by field fissure detection and statistical analysis.On the assumption that the structural plane of fissures is filmy-disciform and smooth,the spatial locations of fissures are determined by the Poisson model,and a random fissure network model is constructed by use of the Monte-Carlo principle.The analysis of the relationship between the fractured rate and the elementary volume shows that the representative elementary volume in the studied area is 17?m×17?m×17?m,which is much small as compared with the studied area and can reflect the overall seepage regularity of fissures in the studied area.更多还原