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一、斯帖法公式: 斯帖法公式是最早的和最著名的确定冻结深度的公式之一。式中: Z——冻结深度,米; λ——冻土的导热系数,千卡/米·时·度; T——冻结期的平均负温,度; Ⅳ——冻结期的长度,小时; ρ——冰的结晶潜热,等于80千卡/公斤; ω——单位土体中的含冰量,公斤/米~3。这个公式中的T和N值被认为是已知的,因为他们可以根据水文气象服务总局的手册资料中统计出来。斯帖法公式中的λ和ω值极不稳定,在同一地点和同一土层中,它们的数值年年不同,就是在同一年中,它们的变化范围(若干倍)也是非常大的,这主要是由于在土的冻结过程
Stacey’s formula: Stacey’s formula is one of the earliest and most famous formulas for determining the depth of freezing. Where: Z - frozen depth, m; λ - thermal conductivity of frozen soil, kcal / m · degree; T - the average negative temperature during freezing, degree; Ⅳ - the length of the freeze period, hours ; ρ - the latent heat of crystallization of ice, equal to 80 kcal / kg; ω - ice content per unit of soil, kg / m ~ 3. The T and N values in this formula are considered to be known because they can be calculated from the manuals of the Hydrometeorological Services Administration. The λ and ω values in Stäte’s formula are extremely unstable. Their values vary year after year in the same place and in the same soil. That is, their range of variation (several times) is also very large in the same year. Mainly due to the freezing process in the soil