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在渗透稳定的可靠性分析中,确定渗透系数的概率分布非常必要。基于渗透系数概率分布构建了偏态分布模型,结合江垭碾压混凝土坝体的透水率试验数据及渗透系数和透水率的换算因子对渗透系数进行了随机性分析,并编制相应的FORTRAN程序,采用偏态分布概率密度函数拟合渗透系数的概率分布。结果表明,利用FORTRAN程序对渗透系数进行偏态分布拟合,能获得较理想的概率密度曲线;采用众数和综合标准差代替均值和均方差作为统计值,可使结果更合理、可靠。
In the stability analysis of infiltration stability, it is necessary to determine the probability distribution of permeability coefficient. Based on the probability distribution of permeability coefficient, a skewed distribution model was constructed. According to the permeability test data of Jiangya RCC dam and the permeability factor and permeability factor, the permeability coefficient was analyzed stochastically and the corresponding FORTRAN program was compiled. Probability Distribution of Filtration Coefficient by Fitting Probability Distribution Probability Density Function. The results show that the FORTRAN program can be used to fit the permeability coefficient skewness distribution, and the ideal probability density curve can be obtained. Using the mode and standard deviation instead of the mean and the mean square error as the statistics, the result is more reasonable and reliable.