中文摘要：

将胶体化学的DLVO理论引入到泥沙絮凝问题的研究中，从力学角度提出了一种分析确定泥沙絮凝临界粒径值的新方法，并力求从量级上对影响泥沙絮凝的各种因素进行了分析，与现有研究成果对比，表明本文提出的方法可以用于分析和确定静水中泥沙的絮凝临界粒径值，动水中絮凝临界粒径的确定方法有待更进一步的研究。

英文摘要：

DLVO theory for coltoids is brought in research of sediment aggregation and a new method to determine the maximal diameter of aggregation is figured out, and all the factors that influence the aggregation are analyzed. The final results have a good consistency with that of the former experiments and observations. Therefore this method can be used in analyzing and determining the maximal diameter of fine sediment aggregation in steady water. More work should be done to make new advance in this field.