粒组是界于一定范围内,成分相近,性质相似的土粒,200mm的为块石,20mm的为卵石,2mm的为圆砾石颗粒,0,075mm的为沙粒,0.005mm的为粉粒及粘粒,粒径大于0.075mm的用筛分法,粒径小于0.075mm的用水分法.土的工程分类,按堆积...