Experimental Research on Frost Heave Characteristics of Gravel Soil and Multifactor Regression Prediction

Table 3

Influence of various clay contents on frost-heaving ratio.

Test no.	Compactness (%)	Overlying load (kPa)	Saturation	Clay content (%)	Frost-heaving ratio (%)	Fitting curve	R^2
1	95	20	0.8	10	0.10	y = −0.0012x^2 + 0.1012x − 0.791	1
2				15	0.46
3				20	0.75
4				25	0.99
5			0.9	10	0.19	y = −0.0025x^2 + 0.1589x − 1.1395	0.9972
6				15	0.71
7				20	1.01
8				25	1.28
9			1	10	0.28	y = −0.0042x^2 + 0.2258x − 1.559	1
10				15	0.88
11				20	1.28
12				25	1.46