Factor of Safety Reduction Factors for Accounting for Progressive Failure for Earthen Levees with Underlying Thin Layers of Sensitive Soils

Table 3

Parameter combinations investigated in the present study.

Analysis group	Foundation material strength (kPa)	Thin layer thickness (m)	Thin layer depth range (m)	Thin layer curve number
Group 1	47.8	0.6	1.8–10.1	1(a)
			2.4–10.1	1(b)
			1.8–10.1	1(c)
			1.8–10.1	2(a)
			2.4–10.1	2(b)
			1.8–10.1	2(c)
Group 2	47.8	0.9	2.4–12.2	1(a)
			2.4–15.2	1(b)
			2.4–12.2	1(c)
			2.4–12.2	2(a)
			2.4–12.2	2(b)
			2.4–10.1	2(c)
Group 3	35.9	0.6	5.2–10.1	3(a)
			5.2–10.1	3(b)
			5.2–10.1	3(c)
		0.9	5.2–10.1	3(b)
			5.2–10.1	3(c)