Compression Load Tests on Composite Foundations of Spread Footing Anchored by Helical Anchors

Table 3

Interpreted compression load capacities and settlements for all three foundations.

Foundation number	Interpreted compression capacity, Q^a (kN), and the settlement, s^b,c (mm)
	QL1	sL1	QST	sST	QTI	sTI	QL2	sL2	QT&P	QCHIN	sCHIN
CF1	214	1.26	475	7.21	632	15.10	813	30.22	764	1166	>62.43^d
CF2	205	1.15	479	6.88	642	12.93	910	29.57	858	1410	>62.05
CF3	375	3.20	562	8.51	724	15.53	977	32.12	878	1435	>60.90

^aInterpreted load capacities for various methods: Q_ST, slope tangent method; Q_TI, tangent intersection method; Q_L1, L₁ method; Q_L2, L₂ method; Q_T&P, Terzaghi and Peck method; and Q_CHIN, Chin method. ^bSettlements for the various methods: s_ST, slope tangent method; s_TI, tangent intersection method; s_L1, L₁ method; s_L2, L₂ method; s_T&P, Terzaghi and Peck method; and s_CHIN, Chin method. ^cBy definition, s_T&P = 25.4 mm, not included in the table. ^dThe symbol (>) expresses that the interpreted settlement is greater than the measured data.