permafrost table

基本解释

The thermal offset and permafrost table temperature are important energy indexes in studying permafrost active layers and frost soil environment.
温度位移和多年冻土顶板温度是活动层研究和冻土环境研究中重要的能量指标。
The closed ballast layer can raise permafrost table, decrease annual mean ground temperature below the ballast layer, and protect the permafrost effectively.
封闭碎石道碴层可以提升冻土上限，降低多年冻土温度，对下部多年冻土起到很好的保护作用。
Considering the effect on permafrost table, there is a kind of dynamic equivalence to some degree among pavement types, external temperature and embankment heights.
从对基底冻土上限影响的角度来看，路面类型、外部气温与路基高度三者间存在一定的动态等效关系。