| 基于连续介质热力学的冻土中未冻水含量与温度的关系 |
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| 引用本文： | 覃英宏,张建明,郑波,曲广周.基于连续介质热力学的冻土中未冻水含量与温度的关系[J].青岛大学学报(工程技术版),2008,23(1):77-82. |
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| 作者姓名： | 覃英宏 张建明 郑波 曲广周 |
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| 作者单位： | 中国科学院寒区旱区环境与工程研究所,冻土工程国家重点实验室,兰州,730000 |
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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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中国科学院知识创新工程项目
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中国科学院基金 |
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| 摘 要： | 许多关于未冻水含量与温度之间关系的经验公式缺乏连续介质热力学理论的证明,且在温度接近0℃时出现奇异,因此不能很好地拟合冻土中未冻水含量与温度之间的关系曲线。从引入未冻水含量作为内变量和与内变量功共轭的相变潜热出发,利用连续介质热力学理论推导出冻土中未冻水含量与负温绝对值关系的理论公式。实验证明,所求得的公式可以很好地拟合冻土中未冻水含量与负温绝对值的关系曲线。
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| 关 键 词： | 冻土总含水量 相变潜热 负温绝对值 能量守恒定律 高温高含冰量冻土 |
| 文章编号： | 1006-9798(2008)01-0077-06 |
| 修稿时间： | 2006年10月20 |
The Relationship Between Unfrozen Water Content and Temperature Based on Continuum Thermodynamics |
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| QIN Ying-hong,ZHANG Jian-ming,ZHENG bo,QU Guang-zhou.The Relationship Between Unfrozen Water Content and Temperature Based on Continuum Thermodynamics[J].Journal of Qingdao University(Engineering & Technology Edition),2008,23(1):77-82. |
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| Authors: | QIN Ying-hong ZHANG Jian-ming ZHENG bo QU Guang-zhou |
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| Affiliation: | (Cold and Arid Regions Environment and Engineering Research Institute Chinese Academy of Sciences, Lanzhou 730000, China) |
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| Abstract: | The unfrozen water content in frozen soils plays a key role in the thermal-mechanical characteristic of frozen soils and therefore has been studied extensively.Based on experimentations,many empirical formulas are obtained.However,singular vertex appears on these empirical formulas when temperature is zero because they lack of foundation of continuum thermodynamics.In frozen soils,the unfrozen water content is considered as an internal variable,and the work conjugated with the internal variable is the latent heat of phase change of unfrozen soil.The continuum thermodynamic theory is employed to deduce the formula of the relationship between the unfrozen water content and soil temperature.The experimental results of warm and ice-rich frozen soils agree well with the result predicted by deduced formula. |
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| Keywords: | water content in frozen soil latent heat of phase change absolute value of negative temperature law of conservation of energy warm and ice-rich frozen soil |
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