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

Table 4

Calculation results.

Ds (mm)	De (mm)	ns	Dea (mm)	da (mm)	de (mm)	de/Dea	Clogging patterns from the experimental observations
32∼64	45.255	0.326	7.68–9.73	4–8	5.66	0.58–0.74	S
				2–4	2.83	0.29–0.37	I
				1–2	1.41	0.15–0.18	N
				0.5–1	0.71	0.07–0.09	N
				0.25–0.5	0.36	0.04–0.05	N
				0.125–0.25	0.18	0.02–0.03	N
				0.063–0.125	0.09	0.01–0.02	N
16∼32	22.627	0.310	3.57–4.52	4–8	5.66	1.25–1.59	S
				2–4	2.83	0.63–0.79	S–I
				1–2	1.41	0.31–0.40	I
				0.5–1	0.71	0.15–0.20	N
				0.25–0.5	0.36	0.07–0.10	N
				0.125–0.25	0.18	0.03–0.05	N
				0.063–0.125	0.09	0.01–0.03	N
8∼16	11.314	0.290	1.62–2.05	2–4	2.83	1.38–1.74	S
				1–2	1.41	0.69–0.87	S–I
				0.5–1	0.71	0.34–0.44	I
				0.25–0.5	0.35	0.17–0.22	N
				0.125–0.25	0.16	0.08–0.11	N
				0.063–0.125	0.08	0.04–0.06	N
4∼8	5.657	0.307	0.88–1.11	1–2	1.41	1.27–1.60	S
				0.5–1	0.71	0.63–0.80	S–I
				0.25–0.5	0.35	0.31–0.40	I
				0.125–0.25	0.18	0.15–0.20	N
				0.063–0.125	0.09	0.07–0.10	N
2∼4	2.828	0.340	0.51–0.65	0.5–1	0.71	1.09–1.39	S
				0.25–0.5	0.35	0.54–0.69	S–I
				0.125–0.25	0.18	0.27–0.35	I
				0.063–0.125	0.089	0.13–0.18	N
1∼2	1.414	0.332	0.25–0.31	0.25–0.5	0.35	1.13–1.40	S
				0.125–0.25	0.18	0.58–0.72	S–I
				0.063–0.125	0.089	0.29–0.36	I
0.5∼1	0.707	0.335	0.125–0.16	0.125–0.25	0.18	1.13–1.44	S
				0.063–0.125	0.089	0.56–0.72	S–I

Note. D_s denotes soil skeleton particle size. D_a denotes incoming particle size. D_e is the equivalent size of soil skeleton particles. D_e denotes the equivalent size of incoming particles. ns is the porosity of the soil skeleton. α₁ is the particle shape correction factor. Dea is the effective aperture of soil in different α₁.