英语词汇“frost line”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	frost line
释义	frost line frost line n.1. The depth to which frost penetrates the earth.2. The altitude below which frost does not occur, especially in tropical regions. frost line n1. (Geological Science) the deepest point in the ground to which frost will penetrate2. (Geological Science) the limit towards the equator beyond which frosts do not occur Translations frost line frost line [′frȯst ‚līn] (geology) The maximum depth of frozen ground during the winter. The lower limit of the permafrost. (materials) In polyethylene film extrusion, a ring-shaped area with a frosty appearance at the point where the film reaches its final diameter. frost line An imaginary line indicating the depth of frost penetration in the ground. frost line frost line The depth of frost penetration into the soil.It varies from area to area,depending on the soil quality in a particular location, but can average 3 to 4 feet below the surface. Building foundations should penetrate below the frost line in order to avoid the shifting caused by frost heaving. Many local building codes allow an exception with the use of a frost-protected shallow foundation, which uses insulation and drainage techniques to raise the frost line to just below the surface.
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