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对细颗粒泥沙的基本特性尤其是沉降特性进行深入探索有助于解决泥沙学科很多悬而未决的问题。在查阅大量中外文献的基础上,借助大型可温控自动搅拌沉降试验筒,对长江口天然细颗粒泥沙的沉降机理展开了室内试验。结果表明:含沙量和粒径均是影响细颗粒泥沙沉速的重要因子,并进一步推断细颗粒泥沙絮凝沉降的过程可能是一个絮凝体、絮网结构“网捕-重构”的过程。
In-depth exploration of the basic characteristics of fine sediment, especially sedimentation characteristics, can help solve many outstanding issues in the sediment discipline. On the basis of consulting a large number of Chinese and foreign literatures, indoor experiments were carried out on the sedimentation mechanism of natural fine-grained sediment in the Yangtze Estuary with the help of a large temperature-controlled automatic agitating sedimentation test tube. The results show that both sediment concentration and particle size are important factors that affect the sedimentation rate of fine sediment. It is further concluded that the flocculation and sedimentation process of fine sediment may be a floc structure, "the process of.