Effect of Water Content on Apparent Cohesion of Soils from Landslide Sites
There are many empirical equations published for unsaturated fine-grained soils. However, there is only one empirical equation established for silty sand using the shear-box test and filter-paper-based suction test, but with the suction range of 0 to 200 kPa. It is reported that there is a significa...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-04-01
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| Series: | Geotechnics |
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| Online Access: | https://www.mdpi.com/2673-7094/2/2/17 |
| _version_ | 1797487067931869184 |
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| author | Sinnappoo Ravindran Ivan Gratchev |
| author_facet | Sinnappoo Ravindran Ivan Gratchev |
| author_sort | Sinnappoo Ravindran |
| collection | DOAJ |
| description | There are many empirical equations published for unsaturated fine-grained soils. However, there is only one empirical equation established for silty sand using the shear-box test and filter-paper-based suction test, but with the suction range of 0 to 200 kPa. It is reported that there is a significant discrepancy between the predicted values and test results of apparent cohesion within the range of 0 to 100 kPa for unsaturated coarse-grained soils. The purpose of this research is to study the effect of water content on apparent cohesion and predict apparent cohesion for coarse-grained soils within the range of 0 to 100 kPa using shear-box test and suction test results without much inconsistency. In this research, soil samples from the rainfall-induced landslide sites were obtained; laboratory tests such as soil-classification tests, shear-box tests and consolidated undrained triaxial tests were carried out. Test results were analyzed, and the findings are presented. When the water content is increased from 0% to 30%, there is a reduction of 89% in apparent cohesion on average. A newly developed prediction model for apparent cohesion based on the low range of matric suction from 0 to 100 kPa for unsaturated coarse-grained soils is introduced in this paper and compared with published models. |
| first_indexed | 2024-03-09T23:42:22Z |
| format | Article |
| id | doaj.art-e91e4494e6454c45b8930726ebd980fb |
| institution | Directory Open Access Journal |
| issn | 2673-7094 |
| language | English |
| last_indexed | 2024-03-09T23:42:22Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Geotechnics |
| spelling | doaj.art-e91e4494e6454c45b8930726ebd980fb2023-11-23T16:50:16ZengMDPI AGGeotechnics2673-70942022-04-012238539410.3390/geotechnics2020017Effect of Water Content on Apparent Cohesion of Soils from Landslide SitesSinnappoo Ravindran0Ivan Gratchev1School of Engineering & Built Environment, Griffith University, Gold Coast, QLD 4222, AustraliaSchool of Engineering & Built Environment, Griffith University, Gold Coast, QLD 4222, AustraliaThere are many empirical equations published for unsaturated fine-grained soils. However, there is only one empirical equation established for silty sand using the shear-box test and filter-paper-based suction test, but with the suction range of 0 to 200 kPa. It is reported that there is a significant discrepancy between the predicted values and test results of apparent cohesion within the range of 0 to 100 kPa for unsaturated coarse-grained soils. The purpose of this research is to study the effect of water content on apparent cohesion and predict apparent cohesion for coarse-grained soils within the range of 0 to 100 kPa using shear-box test and suction test results without much inconsistency. In this research, soil samples from the rainfall-induced landslide sites were obtained; laboratory tests such as soil-classification tests, shear-box tests and consolidated undrained triaxial tests were carried out. Test results were analyzed, and the findings are presented. When the water content is increased from 0% to 30%, there is a reduction of 89% in apparent cohesion on average. A newly developed prediction model for apparent cohesion based on the low range of matric suction from 0 to 100 kPa for unsaturated coarse-grained soils is introduced in this paper and compared with published models.https://www.mdpi.com/2673-7094/2/2/17shear strengthapparent cohesionwater contentrainfall-induced landslides |
| spellingShingle | Sinnappoo Ravindran Ivan Gratchev Effect of Water Content on Apparent Cohesion of Soils from Landslide Sites Geotechnics shear strength apparent cohesion water content rainfall-induced landslides |
| title | Effect of Water Content on Apparent Cohesion of Soils from Landslide Sites |
| title_full | Effect of Water Content on Apparent Cohesion of Soils from Landslide Sites |
| title_fullStr | Effect of Water Content on Apparent Cohesion of Soils from Landslide Sites |
| title_full_unstemmed | Effect of Water Content on Apparent Cohesion of Soils from Landslide Sites |
| title_short | Effect of Water Content on Apparent Cohesion of Soils from Landslide Sites |
| title_sort | effect of water content on apparent cohesion of soils from landslide sites |
| topic | shear strength apparent cohesion water content rainfall-induced landslides |
| url | https://www.mdpi.com/2673-7094/2/2/17 |
| work_keys_str_mv | AT sinnappooravindran effectofwatercontentonapparentcohesionofsoilsfromlandslidesites AT ivangratchev effectofwatercontentonapparentcohesionofsoilsfromlandslidesites |