Probabilistic Prediction of Maximum Tensile Loads in Soil Nails

Table 3

Outcomes of correlation tests between measured values and values of input parameters based on data group 1 ().

Input parameter	Spearman’s rank correlation test		Pearson’s correlation test
		value		value
Coulomb Earth pressure coefficient, Ka	−0.09	0.43 > 0.05	−0.20	0.09 > 0.05
Soil unit weight,	−0.24	0.04 < 0.05	−0.12	0.32 > 0.05
Depth of nail head,	−0.71	0.00 < 0.05	−0.64	0.00 < 0.05
Surcharge,	0.07	0.54 > 0.05	0.02	0.88 > 0.05
Tributary area,	−0.10	0.38 > 0.05	−0.03	0.80 > 0.05