| 非饱和土体气态水迁移引起的含水量变化方程 |
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| 引用本文： | 王铁行,赵树德. 非饱和土体气态水迁移引起的含水量变化方程[J]. 中国公路学报, 2003, 16(2): 18-21 |
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| 作者姓名： | 王铁行 赵树德 |
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| 作者单位： | 1. 西安建筑科技大学土木工程学院,陕西,西安,710055;西安理工大学岩土工程研究所,陕西,西安,710048
2. 西安建筑科技大学土木工程学院,陕西,西安,710055 |
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| 基金项目： | 陕西省自然科学基金项目(2001C28) |
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| 摘 要： | 基于现有土力学理论及流体力学理论 ,结合非饱和土气态水迁移特征 ,得到了根据土体基质吸力和温度确定土孔隙饱和蒸气压力的表述关系式 ,推导得到非饱和土体中气态水迁移引起含水量变化的非稳态方程 ,方程揭示了气态水迁移的动力是温度梯度和含水量梯度 ,气态水迁移现象是温度不均匀分布和含水量不均匀分布单独或共同作用的表现形式 ,方程表述了实验揭示的现象。最后应用含水量变化方程对实验结果进行了计算分析 ,验证了该方程的合理性
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| 关 键 词： | 道路工程 非饱和土 力学理论 气态水迁移 方程 温度 含水量 |
| 文章编号： | 1001-7372(2003)02-0018-04 |
| 修稿时间： | 2002-06-17 |
Equation for water vapour transfer in unsaturated soil |
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| WANG Tie hang ,,ZHAO Shu de. Equation for water vapour transfer in unsaturated soil[J]. China Journal of Highway and Transport, 2003, 16(2): 18-21 |
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| Authors: | WANG Tie hang ZHAO Shu de |
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| Affiliation: | WANG Tie hang 1,2,ZHAO Shu de 1 |
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| Abstract: | On the basis of the existing theories such as soil mechanics and fluid mechanics,as well as the features on water vapour transfer in unsaturated soil,authors get the formula to calculate the saturated water vapour pressure in soil void by taking the matrix suction and temperature into account,and derive the equation by which the moisture migration with time in soil resulting from water vapour transfer can be proved into,the equation reveals that the water vapour transfer in soil is resulted from thermal gradient and water content gradient,the nonuniform distributions of temperature and water content in unsaturated soil all can result in water vapour transfer,this conforms to the test results.Analysis on the test and calculated data verifies the reliability of the equation,and indicates that the water vapour transfer and the liquid water transfer in unsaturated soil are influenced each other. |
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| Keywords: | road engineering unsaturated soil mechanics theory water vapour transfer equation temperature water content |
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