Variation of Permafrost Upper Limit in Permafrost Subgrade Covered by Snow on Steep Slope of Alpine Mountains

Table 3

Main parameters of roadbed model.

Lithology	m				a0 ()	(kg)	(m/s)	[J/(kg]	[J/(kg ]	[W/(m ]	[W/(m ]
Gravel soil	0.26	0.25	0.01	0.08	0.45	2100	4 × 10^−6	870	1060	1.5	1.4
Low clay	0.26	0.4	0.02	0.20	3.28	1920	4 × 10^−7	1140	1270	1.8	1.5
Mudstone	0.26	0.1	0.01	0.90	0.80	2200	2 × 10^−9	1200	1350	2.5	2.0