Probabilistic Prediction of Maximum Tensile Loads in Soil Nails

Table 4

Comparisons of model accuracy in estimation of maximum nail loads among different models.

Method	Model equation	Empirical term,	Empirical constants							M correlated to
			a	b	c	d	e				Input para.
The present study			−1.45	1.55	—	—	—	1.00	0.412	No	None
Default FHWA simplified model		(1)	1.25	0.50	0.75	2.03	−1.83	0.59	0.516	Yes	,
		(2)
		(3)
Modified FHWA simplified model			0.04	−0.14	1.20	—	—	1.00	0.454	No	None

Note: (1.5 m × 1.5 m = 2.25 m²) is the typical tributary area; based on both data groups, i.e., data groups 1 and 2 ().