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调整出具有不同特征的6种级配曲线,施工中在5个不同位置取样,检测不同级配类型混合料的级配组成、构造深度和密度,研究了各种级配混合料在生产及施工过程中发生离析的程度与规律。分析了检测数据的平均组间离差平方和及集料分形维数之间的关系,建立了二者之间的线性回归模型,进行了混合料级配的评估与离析程度的预测。分析结果表明:各种级配混合料离析程度由大到小分别为反S型、间断型、最大密度曲线之上微弓型、S型、最大密度曲线型与最大密度曲线之下微弓型;对回归方程进行F(1,5)显著性检验,其概率值为0.013,小于显著水平0.05,说明该线性模型有效。
Six kinds of gradation curves with different characteristics were adjusted. During construction, samples were taken at five different locations to examine the gradation composition, structure depth and density of the mixtures of different grades and gradients. Various gradation mixtures were studied in production and construction The extent and laws of segregation during the process. The relationship between the mean squared deviation of the test data and the fractal dimension of the aggregate was analyzed. A linear regression model was established and the grade of the mixture was evaluated and the degree of segregation was predicted. The analysis results show that the degree of segregation of various gradation mixes is anti-S type, discontinuous type and micro-bow type under the maximum density curve ; The F (1, 5) significance test of the regression equation, the probability value of 0.013, less than the significant level of 0.05, indicating that the linear model is valid.