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以往确定砂砾料的压实标准,大多是用相对密度确定干容重的办法,这种方法需要同时确定最大和最小干容重,但砂砾料的最小干容重较难以准确确定,特别是当粒径较大时,试验就更困难,至今尚无标准试验方法。笔者提出下列方法,可直接确定压实度(m)～相对密度(D_r)的关系,从而转化为直接用压实度来确定设计干容重(γ_d)。根据相对密度的定义D_r=(γd-γmin)γmax/(γmax-γmin))γd (1)
In the past, the standard of compaction of gravel material was mostly determined by relative density to determine the dry bulk density. This method needs to determine the maximum and minimum dry bulk density at the same time. However, the minimum dry bulk density of gravel material is hard to be accurately determined, especially when the particle size is relatively small Large, the test is more difficult, so far there is no standard test method. The author proposes the following method, which can directly determine the relationship between compaction (m) and relative density (D_r), so as to determine the design dry weight (γ_d) directly by compaction. According to the definition of relative density D_r = (γd-γmin) γmax / (γmax-γmin)) γd (1)