| 冻融试验对土中含水量分布的影响 |
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| 引用本文： | 杨成松,何平,程国栋,顾同欣.冻融试验对土中含水量分布的影响[J].冰川冻土,2004,26(Z1):50-55. |
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| 作者姓名： | 杨成松 何平 程国栋 顾同欣 |
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| 作者单位： | State Key Laboratory of Frozen Soil Engineering, CAREERI, CAS, Lanzhou Gansu 730000, China |
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| 基金项目： | 中国科学院知识创新工程项目 |
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| 摘 要： | The silty clay and silty loam are two typical soil types obtained from two test sites along the Qinghai-Tibet railway. The two types of soil have been designed various initial dry densities, water eontents, temperature conditions in repeated freezing and thawing tests with free access to water at the bottom. Afterfreeze-thaw cycles, the moisture content in the freeze-thaw zone increases more than that in the unfrozen zone to the peak approximately at the top of the samples. With comparison of the water contents in the frozen and thawed states, the moisture content in the upper freeze-thaw zone in the frozen state is greater than that in the thawed state, while that in unfrozen zone in the frozen state is smaller than that in the thawed state. Within the region of the frost front, the water content in frozen state is smaller than that in thawed state. These findings help to study the freeze-thaw mechanisms deeply and perfect the forecasting module of moisture transferring in freeze-thaw cycles.
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| 关 键 词： | freeze-thaw cycles moisture content moisture transferring 冻融试验 含水量分布 影响 Soil Moisture Content Influence help study mechanisms perfect forecasting module moisture transferring water content region frost front upper states comparison |
Freeze-Thaw Experiment Influence on Moisture Content Distrution of Soil |
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| YANG Cheng-song,HE Ping,CHENG Guo-dong,GU Tong-xin.Freeze-Thaw Experiment Influence on Moisture Content Distrution of Soil[J].Journal of Glaciology and Geocryology,2004,26(Z1):50-55. |
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| Authors: | YANG Cheng-song HE Ping CHENG Guo-dong GU Tong-xin |
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| Abstract: | The silty clay and silty loam are two typical soil types obtained from two test sites along the Qinghai-Tibet railway. The two types of soil have been designed various initial dry densities, water eontents, temperature conditions in repeated freezing and thawing tests with free access to water at the bottom. Afterfreeze-thaw cycles, the moisture content in the freeze-thaw zone increases more than that in the unfrozen zone to the peak approximately at the top of the samples. With comparison of the water contents in the frozen and thawed states, the moisture content in the upper freeze-thaw zone in the frozen state is greater than that in the thawed state, while that in unfrozen zone in the frozen state is smaller than that in the thawed state. Within the region of the frost front, the water content in frozen state is smaller than that in thawed state. These findings help to study the freeze-thaw mechanisms deeply and perfect the forecasting module of moisture transferring in freeze-thaw cycles. |
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| Keywords: | freeze-thaw cycles moisture content moisture transferring |
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