【摘要】 粗细颗粒区分粒径是级配不连续碎砾石细粒含量判别法判定渗透变形类型重要指标,目前通常使用的有定值法的2 mm和颗粒级配曲线中平缓段最小粒径(平均粒径),为进一步验证这2个典型方法和量值的符合性、适宜性,统计了26个工程121个试样的渗透变形试验结果进行比较。结果表明:2种方法和量值的渗透变形类型判断结果与试验结果符合率较高,分别为85.5%和84.6%,均可作为粗细颗粒区分粒径,但若和级配连续碎砾石渗透变形类型判断综合考虑,推荐2mm作为级配不连续碎砾石粗细颗粒区分粒径。更多还原

【Abstract】 The determination of coarse and fine particles are the important indexes of determining the permeability deformation types of discontinuously graded crushed gravels. The commonly adopted methods recently are the constant 2 mm value method and the minimum particle size( average particle size method) in the flat section of gradation curve. In order to further verify the consistency and adaptability of the two methods and the values,comparative analysis has been conducted on the permeability deformation test results of 121 samples which were taken from26 projects. It shows that the consistency ratio of the judged result and test result is high,which is 85. 5% and 84.6% respectively. According to comprehensive consideration on the judgment of permeability deformation type of continuously graded crushed gravel,the particle size of 2 mm is recommended as the distinguished size of coarse and fine particle of discontinuously graded crushed gravels.更多还原