Effect of Porosity on Soil-Water Retention Curves: Theoretical and Experimental Aspects
Porosity change is a common characteristic of natural soils in fluid-solid interaction problems, which can lead to an obvious change of the soil-water retention curve (SWRC). The influence of porosity on soil water retention phenomena is investigated by a theoretical model and an experimental test i...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2020/6671479 |
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| _version_ | 1832546985136095232 |
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| author | Chang Liu Fuguo Tong Long Yan Hongbo Zhou Shuang Hao |
| author_facet | Chang Liu Fuguo Tong Long Yan Hongbo Zhou Shuang Hao |
| author_sort | Chang Liu |
| collection | DOAJ |
| description | Porosity change is a common characteristic of natural soils in fluid-solid interaction problems, which can lead to an obvious change of the soil-water retention curve (SWRC). The influence of porosity on soil water retention phenomena is investigated by a theoretical model and an experimental test in this study. A model expressing the change in suction with porosity and effective saturation is put forward theoretically. The model is based on an idealization of three-phase porous materials, the pore structures of which are homogeneous and isotropic. It accounts for the porosity effect on soil water retention, using four parameters with clear physical meanings. The presented model can obtain the SWRC at any porosity, which will reduce the test number required in characterizing the hydraulic behavior of soil. A laboratory experiment for loamy sand with different porosities is performed. The test results show that suction has a significant variation with changes in porosity and decreases with the increase of porosity. The formulation is verified by both the test data and the literature data for FEBEX bentonite and Boom clay. The very good agreements between measured and predicted results show that the SWRC model is reliable and feasible for various soils. |
| format | Article |
| id | doaj-art-f4fa633a34e540dbb20360d44a7622fa |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-f4fa633a34e540dbb20360d44a7622fa2025-02-03T06:46:32ZengWileyGeofluids1468-81151468-81232020-01-01202010.1155/2020/66714796671479Effect of Porosity on Soil-Water Retention Curves: Theoretical and Experimental AspectsChang Liu0Fuguo Tong1Long Yan2Hongbo Zhou3Shuang Hao4College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang 443002, ChinaKey Laboratory of Geological Hazards on Three Gorges Reservoir Area (China Three Gorges University), Ministry of Education, Yichang 443002, ChinaInstitute of Geotechnical Engineering, Hohai University, Nanjing 210098, ChinaNonferrous Geological Exploration and Research Institute Limited Liability Company, Shenyang 110013, ChinaDepartment of Sustainable Development, Environmental Science and Engineering, KTH Royal Institute of Technology, S-10044 Stockholm, SwedenPorosity change is a common characteristic of natural soils in fluid-solid interaction problems, which can lead to an obvious change of the soil-water retention curve (SWRC). The influence of porosity on soil water retention phenomena is investigated by a theoretical model and an experimental test in this study. A model expressing the change in suction with porosity and effective saturation is put forward theoretically. The model is based on an idealization of three-phase porous materials, the pore structures of which are homogeneous and isotropic. It accounts for the porosity effect on soil water retention, using four parameters with clear physical meanings. The presented model can obtain the SWRC at any porosity, which will reduce the test number required in characterizing the hydraulic behavior of soil. A laboratory experiment for loamy sand with different porosities is performed. The test results show that suction has a significant variation with changes in porosity and decreases with the increase of porosity. The formulation is verified by both the test data and the literature data for FEBEX bentonite and Boom clay. The very good agreements between measured and predicted results show that the SWRC model is reliable and feasible for various soils.http://dx.doi.org/10.1155/2020/6671479 |
| spellingShingle | Chang Liu Fuguo Tong Long Yan Hongbo Zhou Shuang Hao Effect of Porosity on Soil-Water Retention Curves: Theoretical and Experimental Aspects Geofluids |
| title | Effect of Porosity on Soil-Water Retention Curves: Theoretical and Experimental Aspects |
| title_full | Effect of Porosity on Soil-Water Retention Curves: Theoretical and Experimental Aspects |
| title_fullStr | Effect of Porosity on Soil-Water Retention Curves: Theoretical and Experimental Aspects |
| title_full_unstemmed | Effect of Porosity on Soil-Water Retention Curves: Theoretical and Experimental Aspects |
| title_short | Effect of Porosity on Soil-Water Retention Curves: Theoretical and Experimental Aspects |
| title_sort | effect of porosity on soil water retention curves theoretical and experimental aspects |
| url | http://dx.doi.org/10.1155/2020/6671479 |
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