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.
溫度位移和多年凍土頂板溫度是活動層研究和凍土環境研究中重要的能量指標。
The closed ballast layer can raise permafrost table, decrease annual mean ground temperature below the ballast layer, and protect the permafrost effectively.
封閉碎石道碴層可以提陞凍土上限，降低多年凍土溫度，對下部多年凍土起到很好的保護作用。
Considering the effect on permafrost table, there is a kind of dynamic equivalence to some degree among pavement types, external temperature and embankment heights.
從對基底凍土上限影響的角度來看，路麪類型、外部氣溫與路基高度三者間存在一定的動態等傚關系。