Ultimate Pullout Capacity of a Square Plate Anchor in Clay with an Interbedded Stiff Layer

Table 1

Verification of the pullout bearing capacity formula.

	Working condition (L = B = 2 m)	Pullout bearing capacity coefficient Nc,l		Difference (%)
		Numerical result	Formula result
1	H1 = 5 m, H2 = 4 m, H = 4 m, α = 0.2	11.70	11.37	2.90
2	H1 = 5 m, H2 = 5 m, H = 9 m, α = 0.6	40.26	39.40	2.18