文中首先以丹江口水庫資料为例,說明淤积物干容重变化的各种現象,进而指出了影响干容重变化的基本因素是淤积物級配和压密条件。其次,探討了淤积物初期干容重的含义,得到了均匀沙初期干容重的表达式,并用野外和室内实測資料进行了核驗。最后,闡述了非均匀沙干容重变化的机理,研究了非均匀沙互不充填、均匀充填与随机充填等不同情况,提出了相应的計算公式,并經实际資料驗証,結果是滿意的。 First of all, taking Danjiangkou Reservoir data as an example, the phenomenon of changes in dry bulk density of sediment is described, and then the basic factors that affect the change of dry bulk density are sediment grading and compaction conditions. Secondly, the meaning of the initial dry bulk density of the sediment was discussed, and the expression of dry bulk density at the initial stage of uniform sand was obtained. The results were verified by field and laboratory data. Finally, the mechanism of non-uniform sand dry weight change is expounded. The different situations such as non-uniform sand non-uniform filling, uniform filling and random filling are studied. Corresponding calculation formulas are proposed and validated by actual data. The results are satisfactory.