Parametric Analysis of Rainfall-Induced Loess Soil Slope Due to the Rainwater Infiltration
Hydraulic properties (such as soil–water characteristic curves (SWCC) and hydraulic conductivity function (HCF)) play an important role in evaluating the stability of unsaturated soil slopes. Loess soils are widely distributed in Gansu Province in China, and most of them are in unsaturated condition...
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MDPI AG
2022-08-01
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| Series: | Urban Science |
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| Online Access: | https://www.mdpi.com/2413-8851/6/3/54 |
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| author | Yang Liu Gang Tian Shijun Wang Alfrendo Satyanaga Qian Zhai |
| author_facet | Yang Liu Gang Tian Shijun Wang Alfrendo Satyanaga Qian Zhai |
| author_sort | Yang Liu |
| collection | DOAJ |
| description | Hydraulic properties (such as soil–water characteristic curves (SWCC) and hydraulic conductivity function (HCF)) play an important role in evaluating the stability of unsaturated soil slopes. Loess soils are widely distributed in Gansu Province in China, and most of them are in unsaturated conditions due to the deep groundwater table (G.W.T). In this study, twenty-eight sets of data published in the literature were analyzed to develop the upper and lower bounds of the SWCC for loess soil in Gansu. The variation of HCF for the loess soil was estimated from the upper and lower bounds curve developed in this study. Subsequently, numerical analyses incorporating scenarios considering different SWCCs, HCFs, and rainfall conditions were conducted for investigating the effects of those factors on the rainfall-induced slope stability. The results of analyses indicate that the infiltration plays an important role in the rainfall-induced slope stability. Higher permeable soil leads to a larger infiltration amount, which, in turn, results in a lower safety factor. In addition, the effect of the hydraulic property on the rainfall-induced slope stability decreases with the increase in slope angle. |
| first_indexed | 2024-03-09T22:17:56Z |
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| institution | Directory Open Access Journal |
| issn | 2413-8851 |
| language | English |
| last_indexed | 2024-03-09T22:17:56Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
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| series | Urban Science |
| spelling | doaj.art-1b4de7ec74754144aaf76ea6709759292023-11-23T19:19:37ZengMDPI AGUrban Science2413-88512022-08-01635410.3390/urbansci6030054Parametric Analysis of Rainfall-Induced Loess Soil Slope Due to the Rainwater InfiltrationYang Liu0Gang Tian1Shijun Wang2Alfrendo Satyanaga3Qian Zhai4Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Bridge Engineering Research Center of Southeast University, Southeast University, Nanjing 210096, ChinaKey Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Bridge Engineering Research Center of Southeast University, Southeast University, Nanjing 210096, ChinaKey Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Bridge Engineering Research Center of Southeast University, Southeast University, Nanjing 210096, ChinaDepartment of Civil and Environmental Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan 010000, KazakhstanKey Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Bridge Engineering Research Center of Southeast University, Southeast University, Nanjing 210096, ChinaHydraulic properties (such as soil–water characteristic curves (SWCC) and hydraulic conductivity function (HCF)) play an important role in evaluating the stability of unsaturated soil slopes. Loess soils are widely distributed in Gansu Province in China, and most of them are in unsaturated conditions due to the deep groundwater table (G.W.T). In this study, twenty-eight sets of data published in the literature were analyzed to develop the upper and lower bounds of the SWCC for loess soil in Gansu. The variation of HCF for the loess soil was estimated from the upper and lower bounds curve developed in this study. Subsequently, numerical analyses incorporating scenarios considering different SWCCs, HCFs, and rainfall conditions were conducted for investigating the effects of those factors on the rainfall-induced slope stability. The results of analyses indicate that the infiltration plays an important role in the rainfall-induced slope stability. Higher permeable soil leads to a larger infiltration amount, which, in turn, results in a lower safety factor. In addition, the effect of the hydraulic property on the rainfall-induced slope stability decreases with the increase in slope angle.https://www.mdpi.com/2413-8851/6/3/54soil–water characteristic curvehydraulic conductivity functionrainfall-induced slope failureloess soil slope |
| spellingShingle | Yang Liu Gang Tian Shijun Wang Alfrendo Satyanaga Qian Zhai Parametric Analysis of Rainfall-Induced Loess Soil Slope Due to the Rainwater Infiltration Urban Science soil–water characteristic curve hydraulic conductivity function rainfall-induced slope failure loess soil slope |
| title | Parametric Analysis of Rainfall-Induced Loess Soil Slope Due to the Rainwater Infiltration |
| title_full | Parametric Analysis of Rainfall-Induced Loess Soil Slope Due to the Rainwater Infiltration |
| title_fullStr | Parametric Analysis of Rainfall-Induced Loess Soil Slope Due to the Rainwater Infiltration |
| title_full_unstemmed | Parametric Analysis of Rainfall-Induced Loess Soil Slope Due to the Rainwater Infiltration |
| title_short | Parametric Analysis of Rainfall-Induced Loess Soil Slope Due to the Rainwater Infiltration |
| title_sort | parametric analysis of rainfall induced loess soil slope due to the rainwater infiltration |
| topic | soil–water characteristic curve hydraulic conductivity function rainfall-induced slope failure loess soil slope |
| url | https://www.mdpi.com/2413-8851/6/3/54 |
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