Permeability Coefficient of Unsaturated Loess and Its Gaseous and Liquid Water Migration Modeling
Water migration changes the water distribution of loess and significantly affects the engineering properties of loess. However, because of the characteristics of loess such as water sensitivity and special structure, it is still difficult to understand the water migration trend of loess. The objecti...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2021/6689603 |
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| author | Ya-lin Nan Zai-kun Zhao Xin Jin Liang Zhang Xiao-xuan Zhu Ze-jun Liu |
| author_facet | Ya-lin Nan Zai-kun Zhao Xin Jin Liang Zhang Xiao-xuan Zhu Ze-jun Liu |
| author_sort | Ya-lin Nan |
| collection | DOAJ |
| description | Water migration changes the water distribution of loess and significantly affects the engineering properties of loess. However, because of the characteristics of loess such as water sensitivity and special structure, it is still difficult to understand the water migration trend of loess. The objectives of this study are to investigate the water diffusion coefficient and soil-water characteristic curve (SWCC) of loess, focusing on the effect of temperature and density, and establish a mixed migration equation for gaseous and liquid water to develop a new calculation method of loess water migration. The results show that the density of loess with larger liquid water content has a more significant effect on the diffusion coefficient than that of less liquid water content. Furthermore, the density significantly affects the matric suction of unsaturated loess, while the temperature change at normal temperature has slight effect. Based on the data obtained in this study, the soil water permeability coefficient was obtained. Moreover, considering the characteristics of mixed migration of gas and liquid water in unsaturated loess, an equation was derived for the gas-liquid water transfer in unsaturated loess. The calculation results are consistent with the experimental results of water migration experiment. Based on the calculation results of water migration, the trend of water migration and proportion of gaseous water during migration were analyzed. |
| format | Article |
| id | doaj-art-9203232b8c124834a171d49dd2dc8f5a |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-9203232b8c124834a171d49dd2dc8f5a2025-02-03T00:59:00ZengWileyAdvances in Civil Engineering1687-80861687-80942021-01-01202110.1155/2021/66896036689603Permeability Coefficient of Unsaturated Loess and Its Gaseous and Liquid Water Migration ModelingYa-lin Nan0Zai-kun Zhao1Xin Jin2Liang Zhang3Xiao-xuan Zhu4Ze-jun Liu5China Electronic Research Institute of Engineering Investigations and Design, Xi’an 710001, ChinaCollege of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaSchool of Civil and Architecture Engineering, Xi’an Technological University, Xi’an 710021, ChinaCollege of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaCollege of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaCollege of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaWater migration changes the water distribution of loess and significantly affects the engineering properties of loess. However, because of the characteristics of loess such as water sensitivity and special structure, it is still difficult to understand the water migration trend of loess. The objectives of this study are to investigate the water diffusion coefficient and soil-water characteristic curve (SWCC) of loess, focusing on the effect of temperature and density, and establish a mixed migration equation for gaseous and liquid water to develop a new calculation method of loess water migration. The results show that the density of loess with larger liquid water content has a more significant effect on the diffusion coefficient than that of less liquid water content. Furthermore, the density significantly affects the matric suction of unsaturated loess, while the temperature change at normal temperature has slight effect. Based on the data obtained in this study, the soil water permeability coefficient was obtained. Moreover, considering the characteristics of mixed migration of gas and liquid water in unsaturated loess, an equation was derived for the gas-liquid water transfer in unsaturated loess. The calculation results are consistent with the experimental results of water migration experiment. Based on the calculation results of water migration, the trend of water migration and proportion of gaseous water during migration were analyzed.http://dx.doi.org/10.1155/2021/6689603 |
| spellingShingle | Ya-lin Nan Zai-kun Zhao Xin Jin Liang Zhang Xiao-xuan Zhu Ze-jun Liu Permeability Coefficient of Unsaturated Loess and Its Gaseous and Liquid Water Migration Modeling Advances in Civil Engineering |
| title | Permeability Coefficient of Unsaturated Loess and Its Gaseous and Liquid Water Migration Modeling |
| title_full | Permeability Coefficient of Unsaturated Loess and Its Gaseous and Liquid Water Migration Modeling |
| title_fullStr | Permeability Coefficient of Unsaturated Loess and Its Gaseous and Liquid Water Migration Modeling |
| title_full_unstemmed | Permeability Coefficient of Unsaturated Loess and Its Gaseous and Liquid Water Migration Modeling |
| title_short | Permeability Coefficient of Unsaturated Loess and Its Gaseous and Liquid Water Migration Modeling |
| title_sort | permeability coefficient of unsaturated loess and its gaseous and liquid water migration modeling |
| url | http://dx.doi.org/10.1155/2021/6689603 |
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