Structural Strength Deterioration Characteristics and a Model of Undisturbed Loess under the Action of Wetting and Freeze-Thaw Cycles

Table 5

Fitting formula for loess expansion rate under freeze-thaw cycles.

(%)	n	Fitting function	R^2
9	n ≤ 3	= 0.1528n + 0.1422	0.9268
	n > 3	= 0.0169n + 0.509	0.9772
15	n ≤ 3	= 0.3057n + 0.2322	0.9722
	n > 3	= 0.0588n + 1.043	0.9981
20	n ≤ 3	= 0.5737n + 0.3379	0.9924
	n > 3	= 0.0543n + 2.2185	0.8822
25	n ≤ 3	= 0.8679n + 0.8049	0.9704
	n > 3	= 0.1431n + 2.9887	0.9929
30	n ≤ 3	= 1.3076n + 1.0666	0.9756
	n > 3	= 0.1458n + 4.9643	0.9295