泥沙颗粒级配曲线与有关特征值关系分析

为解决泥沙颗粒分析工作中出现的没有按照级配曲线的适用性来表达和计算有关特征值给成果质量产生的影响,通过理论分析和研究,论述了不同种泥沙颗粒级配曲线的适用性与有关特征值之间的关系,同时还介绍了一种新的泥沙颗粒级配曲线绘制方法。泥沙颗粒级配曲线的绘制有多种方法,每种级配曲线有其特点和严格的适用性;国家分析室应选择半对数坐标系级配曲线;分组法计算泥沙样品各组平均粒径,应采用每组上下限与其几何均值的和的加权平均值。

Relationship Analysis Between Sediment Grading Curve and Its Relevant Characteristic Values

In order to solve the influences of relevant characteristic values expressed and calculated according to the suitability of sediment grading curve in the analysis of sediment grain on the quality of resuhs from the analysis, the relationship between the suitability of different sediment grading curves and their relevant characteristic values through a theoretical analysis and study were discussed ,and a new method to plot a sediment grading curve was also presented. There is a variety of plotting sediment grading curve, each grading curve has its feature and strict suitability. Slate-owned analysis lab should select a semi-logarithm coordinate system to plot grading curve ; when average grain size over each group of sampling sediment is calculated by grouping method, a weighted mean value of upper and lower limits of sampling sediments within the each group and its geometric mean values should be adopted.