Table 1. Mechanical composition of experimental materials (%).

Types	1∼0.5	0.5∼0.25	0.25∼0.05	0.05∼0.01	0.01∼0.005	0.005∼0.001	<0.001
Lou soil	0.07	0.65	5.86	49.04	12.18	13.72	18.48
Mixed soil	1.83	24.34	30.91	25.29	4.82	5.53	7.27