| 非饱和土与饱和冻融土导湿系数的变化特征 |
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| 引用本文： | 邓友生,徐学祖.非饱和土与饱和冻融土导湿系数的变化特征[J].冰川冻土,1991,13(1):51-59. |
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| 作者姓名： | 邓友生 徐学祖 |
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| 作者单位： | 中国科学院兰州冰川冻土研究所
(邓友生)，中国科学院兰州冰川冻土研究所(徐学祖) |
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| 摘 要： |
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| 关 键 词： | 饱和 土 导湿系数 冻结融化 |
Hydraulic Conductivity of Unsaturated Soil and Its Changing Regularity in Saturated Soil After Freezing-thawing Cycles |
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| Deng Yousheng and Xu Xuezu.Hydraulic Conductivity of Unsaturated Soil and Its Changing Regularity in Saturated Soil After Freezing-thawing Cycles[J].Journal of Glaciology and Geocryology,1991,13(1):51-59. |
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| Authors: | Deng Yousheng and Xu Xuezu |
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| Abstract: | The hydraulic conductivity both in unsaturated and saturated soil after freezing-thawing cycles has been determined in laboratory. Results show that the hydraulic conductivity of unsaturated soils is in relation to saturation degree (or water content) and soil-water potential in the power form. It decreases quickly with decreasing water content and increases with increasing dry density. The hydraulic conductivity decreases with increasing fineness content while the water content and the dry density are the same. The hydraulic conductivity of saturated soil after thawing is greater than that before freezing and its increment is greater in fine-grained soil than in coarse-grained soils after one freezing and thawing cycle and is also greater in the soil with greater dry density. After several freezing and thawing cycles, the hydraulic conductivity is slightly increased, compared with that experienced one freezing and thawing cycle. |
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| Keywords: | unsaturated soil saturated soil hydraulic conductivity freezing-thawing |
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