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通过对混凝土板护面过水堆石围堰结构组成特性及溢流时水力状态的分析，给出了描述堆石围堰过水时堰体内外溢─渗流规律的控制方程，确定了非线性渗流表达式中各项系数的计算式及其物理意义，并建立起计算溢─渗流场的相应数学模型。在计算分析中，对垫层与排水孔的作用采用了相应的数学处理方法，使得理论分析与围堰实际工况比较接近。本文提出的公式与方法简单明了，计算结果与模型试验测值吻合良好，具有一定的实际意义。
Through the analysis of the structural characteristics of the overlying water rockfill cofferdam and the hydraulic state during the overflow, the governing equation describing the overflow-seepage law of the weir in overfilling of the rockfill cofferdam is given, and the nonlinear seepage Expressions of the coefficients of the formula and its physical significance, and to establish the appropriate mathematical model of spillway seepage field. In the calculation and analysis, the corresponding mathematic treatment method is applied to the effect of cushion and drainage hole so that the theoretical analysis is close to the actual working condition of cofferdam. The formulas and methods proposed in this paper are simple and clear, and the calculated results are in good agreement with the measured values of the model tests, which has some practical significance.