A numerical study on the effect of salinity on stability of an unsaturated railway embankment under rainfall
Dispersive soils, as one of the main categories of problematic soils, can be found in some parts of the earth, such as the eastern-south of Iran, nearby the Gulf of Oman. One of the most important factors enhancing the dispersive potential is the existence of dissolved salts in the soil water. The m...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2020-01-01
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| Series: | E3S Web of Conferences |
| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2020/55/e3sconf_e-unsat2020_01004.pdf |
| _version_ | 1819293575814316032 |
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| author | Kolahdooz Ali Sadeghi Hamed Ahmadi Mohammad Mehdi |
| author_facet | Kolahdooz Ali Sadeghi Hamed Ahmadi Mohammad Mehdi |
| author_sort | Kolahdooz Ali |
| collection | DOAJ |
| description | Dispersive soils, as one of the main categories of problematic soils, can be found in some parts of the earth, such as the eastern-south of Iran, nearby the Gulf of Oman. One of the most important factors enhancing the dispersive potential is the existence of dissolved salts in the soil water. The main objective of this study is to explore the influence of water salinity on the instability of a railway embankment due to rainfall infiltration. In order to achieve this goal, the embankment resting on a dispersive stratum is numerically modeled and subjected to transient infiltration flow. The effect of dispersion is simplified through variations in the soil-water retention curve with salinity. The measured water retention curves revealed that by omitting the natural salinity in the soil-water, the retention capability of the soil decreases; therefore, the unsaturated hydraulic conductivity of the soil stratum will significantly decline. According to the extensive decrease in the hydraulic conductivity of the desalinated materials, the rainfall cannot infiltrate in the embankment and the rainfall mostly runs off. However, in the saline embankment, the infiltration decreases the soil suction; and consequently, the factor of safety of the railway embankment decreases. |
| first_indexed | 2024-12-24T04:12:37Z |
| format | Article |
| id | doaj.art-fa4634b68b7a4fb2bf3af6d49e6a111a |
| institution | Directory Open Access Journal |
| issn | 2267-1242 |
| language | English |
| last_indexed | 2024-12-24T04:12:37Z |
| publishDate | 2020-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj.art-fa4634b68b7a4fb2bf3af6d49e6a111a2022-12-21T17:16:01ZengEDP SciencesE3S Web of Conferences2267-12422020-01-011950100410.1051/e3sconf/202019501004e3sconf_e-unsat2020_01004A numerical study on the effect of salinity on stability of an unsaturated railway embankment under rainfallKolahdooz Ali0Sadeghi Hamed1Ahmadi Mohammad Mehdi2Department of Civil Engineering, Sharif University of TechnologyDepartment of Civil Engineering, Sharif University of TechnologyDepartment of Civil Engineering, Sharif University of TechnologyDispersive soils, as one of the main categories of problematic soils, can be found in some parts of the earth, such as the eastern-south of Iran, nearby the Gulf of Oman. One of the most important factors enhancing the dispersive potential is the existence of dissolved salts in the soil water. The main objective of this study is to explore the influence of water salinity on the instability of a railway embankment due to rainfall infiltration. In order to achieve this goal, the embankment resting on a dispersive stratum is numerically modeled and subjected to transient infiltration flow. The effect of dispersion is simplified through variations in the soil-water retention curve with salinity. The measured water retention curves revealed that by omitting the natural salinity in the soil-water, the retention capability of the soil decreases; therefore, the unsaturated hydraulic conductivity of the soil stratum will significantly decline. According to the extensive decrease in the hydraulic conductivity of the desalinated materials, the rainfall cannot infiltrate in the embankment and the rainfall mostly runs off. However, in the saline embankment, the infiltration decreases the soil suction; and consequently, the factor of safety of the railway embankment decreases.https://www.e3s-conferences.org/articles/e3sconf/pdf/2020/55/e3sconf_e-unsat2020_01004.pdf |
| spellingShingle | Kolahdooz Ali Sadeghi Hamed Ahmadi Mohammad Mehdi A numerical study on the effect of salinity on stability of an unsaturated railway embankment under rainfall E3S Web of Conferences |
| title | A numerical study on the effect of salinity on stability of an unsaturated railway embankment under rainfall |
| title_full | A numerical study on the effect of salinity on stability of an unsaturated railway embankment under rainfall |
| title_fullStr | A numerical study on the effect of salinity on stability of an unsaturated railway embankment under rainfall |
| title_full_unstemmed | A numerical study on the effect of salinity on stability of an unsaturated railway embankment under rainfall |
| title_short | A numerical study on the effect of salinity on stability of an unsaturated railway embankment under rainfall |
| title_sort | numerical study on the effect of salinity on stability of an unsaturated railway embankment under rainfall |
| url | https://www.e3s-conferences.org/articles/e3sconf/pdf/2020/55/e3sconf_e-unsat2020_01004.pdf |
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