h. Temperature gradient in the unfrozen soil, ∇θ.
k. Thermal conductivity of soil grains, (kh)g.
Figure 4 (cont'd).
neering design criteria. Variables that cause the
Figures 4a, b and c show how a 10% change in
greatest change in predicted heaving pressure are
either direction from the reference value for the
assumed to be important. The end user should
three soil water parameters influences the calcu-
therefore concentrate on obtaining correct values
lated heave pressure for a given heave rate. In ei-
for these important variables if the predicted re-
ther case, the resulting deviation is less than the
sults are to be useful.
10% change in the control parameter. A 10% change