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粒径计分析成果如何改正 ,至今尚无一个为大家所认同的标准方法。根据长江委和黄委取得的对比实验资料 ,针对影响粒析级配与标准级配关系的主要因素 ,进行优化分析后 ,得出了以颗粒级配的分布多边形为依据 ,按级配曲线的分组峰值出现的所在位置 ,将沙型划分为 4大类 9亚类、分别建立粒析成果与单颗清水沉降法确定的样品标准相应级配粒径改正公式。经检验 ,能满足国家行业标准《河流泥沙颗粒分析规程》规定的精度要求。
How to correct the results of particle size analyzer, so far there is no standard method for everyone to agree. According to the comparative experimental data obtained by the Yangtze River Commission and the Yellow River Committee, the main factors that affect the relationship between the grading gradation and the standard grading are analyzed and optimized. Based on the distribution polygons with graded grading, The location of peak of grouping is divided into 4 categories and 9 sub-categories, and the correction formula of grain size of the corresponding grading standard is established respectively according to the results of grain-size analysis and the method of sedimentation of single water. After testing, to meet the national industry standard “river sediment particles Analysis Regulations” provides the accuracy requirements.