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假设条件:
If we assume, to first order, a soil porosity of 40% and a frozen active layer with saturated ice before thawing, then the thaw settlement causedby volume contraction (corresponding to a density changefrom 0.9 g/cm3of ice to 1 g/cm3of water) is 1.2–2.8 cmwithin one thawing season. the ALT=30cm。
估计:以1cm3为基准算,1g/cm3冰-0.9g/cm3冰,沉降为0.1cm;孔隙度为40%的话(孔隙全部冻结),沉降为0.1*40%=0.04cm,那么ALT=30cm,沉降为1.2cm。
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