摘要
Ⅰ. CALCULATING THE POTENTIAL OF FREEZING In the permafrost regions where the active layer extends to continuous permafrost,the seasonal thawing can reach to its maximum, but the seasonal freezing cannot. It means the potential freezing depth will be deeper than the thawing depth. The residual capacity which is not able to present itself as freeze soil is called the freezing potential. From the view point of energy analysis, the processes of freezing and thaw-
