Exploring the Occurrence of Clogging in Highly Permeable Coarse Soils of Dam Foundations

Table 2

Mass percentage of incoming particle size in different soil media particles.

Incoming particle size (mm)	Mass percentage of incoming PSs in soil media particles (%) and clogging patterns
	32–64 mm					16–32 mm					8–16 mm					4–8 mm					2–4 mm					1–2 mm					0.5–1 mm
	α1	α1+α2		β	CP	α1	α1+α2		β	CP	α1	α1+α2		β	CP	α1	α1+α2		β	CP	α1	α1+α2		β	CP	α1	α1+α2		β	CP	α1	α1+α2		β	CP
4–8	75.2	85.9	97.4	0	S	87	94.4	98.7	0	S	—	—	—	—		—	—	—	—		—	—	—	—		—	—	—	—		—	—	—	—
2–4	10.8	49.4	90.2	6.7	I	46.1	83.6	98.8	0	S–I	92.1	95.6	98.3	0	S	—	—	—	—		—	—	—	—		—	—	—	—		—	—	—	—
1–2	0	0.3	14.5	84.4	N	1	35.3	83	16.1	I	48	86.1	98.6	0	S–I	84.1	91.8	97.7	0	S	—	—	—	—		—	—	—	—		—	—	—	—
0.5–1	0	0	11	87.7	N	1.1	4.6	17.9	81	N	7.7	40.6	76.5	22.1	I	47	82.1	97.3	0	S–I	93.5	95.7	96.4	0	S	—	—	—	—		—	—	—	—
0.25–0.5	0	0	6.1	91.5	N	0	1.1	10.6	88.1	N	1.5	5.6	13.9	83.7	N	2.6	35.7	77	21.1	I	61	84.5	96.8	0	S–I	85.7	92.4	97	0	S	—	—	—	—
0.125–0.25	0	0	1.9	95.1	N	0	0	6.4	92.1	N	0	0	6	92.4	N	0	4.7	23.1	75	N	1.7	37.6	77.1	20.4	I	57.8	79.4	97	0	S–I	90.2	93.9	96.5	0	S
0.063–0.125	0	0	2.1	96.3	N	0	0	1.7	95.7	N	0	0	3.8	94.7	N	0	0	19.5	77.5	N	0.6	2.7	20.9	75.5	N	3.4	40.3	94	2.3	I	59.7	85.5	96.3	0	S–I

Note. CP denotes clogging patterns. S denotes surface clogging. S–I denotes the surface-internal clogging. I denotes the internal partial pore blockage. N denotes unclogging.