通过对黑河水利枢纽工程混凝土骨料生产过程中富余的大量20～40mm砾石与砂子在不同掺和比例下的试验研究,结合试验数据,应用Matlab作出了不同垫层料的掺砂率与松填密度、孔隙率及休止角之间的关系曲线。研究表明,选择砾石和砂子掺和料时,采用松填密度最大、孔隙率最小情况下所对应的掺砂率作为上游围堰的垫层料,沉降量较小,而且是稳定的。因而,提出了利用富余砾石的方法。 Through the experimental research on a large amount of 20-40 mm gravel and sand which are surplus in the concrete aggregate production of Heihe River Project, with the test data, Density, porosity and angle of repose relationship curve. The results show that when the gravel and sand admixture are selected, the density of loose-packing is the highest, and the sand-mixing rate corresponding to the minimum porosity is the bedding material of the upstream cofferdam. The settlement is small and stable. Therefore, a method using surplus gravel has been proposed.