| 探针法测定冻土的导水率 |
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| 引用本文： | 张津生,福田正己.探针法测定冻土的导水率[J].冰川冻土,1991,13(4):349-357. |
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| 作者姓名： | 张津生 福田正己 |
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| 作者单位： | 中国科学院兰州冰川冻土研究所
(张津生)，日本北海道大学低温科学研究所(福田正已) |
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| 摘 要： |
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| 关 键 词： | 冻土 导水率 探针 |
Hydraulic Conductivity Measurements of Frozen Soil by Needle Probe Method |
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| Zhang Jinsheng.Hydraulic Conductivity Measurements of Frozen Soil by Needle Probe Method[J].Journal of Glaciology and Geocryology,1991,13(4):349-357. |
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| Authors: | Zhang Jinsheng |
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| Abstract: | Present authors conducted experimental studies to estimate the hydraulic conductivity of partially frozen soils by means of needle probe method. The transport of heat in partially frozen soils occurs by conduction and by the convective transport of sensible and latent heat arising from the flow of water in gaseous, liquid and solid states. Theory describing the coupled flow of heat and water is used to determine an apparent thermal conductivity. Calculations suggerst that, at temperature close to melting point of ice in a frozen soil, the transport of latent heat may exceed the contribution of heat flux by conduction. Under these conditions, the apparent thermal conductivity becomes much greater than the bulk thermal conductivity. The differences between measured and bulk thermal conductivity of partially frozen soils derive the hydraulic conductivity of frozen soils. Estimated values of the hydraulic conductivity are consistent with previously reported ones. |
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| Keywords: | frozen soil hydraulic conductivity line heat method thermal prob method |
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