| 非饱和膨胀土非稳态渗流方程的参数探讨 |
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| 引用本文： | 翟聚云. 非饱和膨胀土非稳态渗流方程的参数探讨[J]. 冰川冻土, 2009, 31(3): 582-585 |
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| 作者姓名： | 翟聚云 |
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| 作者单位： | 河南城建学院,河南,平顶山,467044 |
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| 基金项目： | 河南省科技发展计划项目 |
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| 摘 要： | 在利用有限元方程进行计算非饱和膨胀土地基水分场变化的非稳态渗流问题时,参数渗透系数kw和水体积变化系数mw2取值至关重要.根据膨胀土地基基质吸力与含水量的变化过程,得到了水体积变化系数mw2并非常数,理论与计算说明与干密度的变化存在相关性.通过拟和探讨了渗透系数kw、水体积变化系数mw2与干密度的相关关系,并对比说明不考虑与考虑干密度影响情况下mw2和kw的数值的差别,干密度对这两个参数的影响规律是在吸力大时影响程度小,在吸力小时影响程度大.
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| 关 键 词： | 膨胀土 干密度 体积变化系数 渗透系数 |
A Study on Parameters of Unsteady Transfusion Equation about Unsaturated Expansive Soil |
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| ZHAI Ju-yun. A Study on Parameters of Unsteady Transfusion Equation about Unsaturated Expansive Soil[J]. Journal of Glaciology and Geocryology, 2009, 31(3): 582-585 |
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| Authors: | ZHAI Ju-yun |
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| Affiliation: | Henan University of Urban Construction;Pingdingshan Henan 467044;China |
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| Abstract: | In a finite element method for calculating moisture migration of unsteady transfusion in unsaturated expansive soil,valuing the water volume change parameter mw2 and the permeability coefficient kw is very important.From a process of matric suction and water content,it is found from theory and calculation that the water volume change parameter is not a constant and has something to do with dry density.Furthermore,the nonlinear dependence of kw and mw2 on dry density is discussed.Water volume change paramete... |
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| Keywords: | expansive soil dry density volume change parameter permeability coefficient |
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