摘 要: 针对河流泥沙粒径具有分布宽阔和不均匀的特性, 探讨了在 分析泥沙样品的颗粒级配时采用两种或两种以上的分析方法相结合 的可行性, 论述了分析悬移质河流泥沙的级配时采用的粒径计- 移液 管( 仪器) 结合法要遵循的原则和结合的方法, 以指导悬移质泥沙的颗 粒分析, 提出了“二级重叠”新方法, 结果表明, 该方法增强了对分离冲 洗筛选择的灵活性, 提高了级配分析成果的精度。 

关键词: 悬移质泥沙; 颗粒分析; 颗粒级配

Abstract: Because the particle size distribution of river sediments is broad and heterogeneous, the feasibility of combining two or more of the analytical methods to complete the particle gradation for sediments of river was introduced. The principles and methods of combining particle size analyzer-pipet (instruments) method to analyze the particle gradation for suspended sediments of river was discussed. A new secondary overlap method was proposed, which could increase the flexibility in selection of the separating sieves and improve the accuracy of the particle gradation results. 

Keywords: suspended sediment; particle analysis; particle gradation