Geotechnical characterization of index and deformation properties of Stockholm clays
This paper describes the geotechnical characteristics of index and deformation properties of Stockholm clays. These clays exhibit large variations both geographically and with depth. The clays range from highly organic clays with high plasticity to silty clays with low plasticity. First, the geologi...
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| Format: | Article |
| Language: | English |
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AIMS Press
2023-04-01
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| Series: | AIMS Geosciences |
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| Online Access: | https://www.aimspress.com/article/doi/10.3934/geosci.2023015?viewType=HTML |
| _version_ | 1797690805646786560 |
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| author | Solve Hov David Gaharia |
| author_facet | Solve Hov David Gaharia |
| author_sort | Solve Hov |
| collection | DOAJ |
| description | This paper describes the geotechnical characteristics of index and deformation properties of Stockholm clays. These clays exhibit large variations both geographically and with depth. The clays range from highly organic clays with high plasticity to silty clays with low plasticity. First, the geological conditions of the clays are outlined to qualitatively explain the typical soil stratigraphy encountered in the Stockholm area. Second, two large generic databases are presented, containing 3,500 and 1,600 data points, respectively. The data originates from routine testing and constant rate of strain oedometer tests conducted in commercial projects. The data is analyzed and compared with results from high quality block sampling. It is seen that a common feature of the clays are low undrained shear strengths, and consequently low yield stresses and oedometer moduli. Further, several deformation properties such as preconsolidation pressure and several oedometer moduli is shown to depend on the soils natural water content and its plasticity. Differences in sample quality is shown to highly affect some properties, highlighting the importance of quality sampling and handling of samples. Criteria for sample quality for this type of clay is proposed based on the oedometer moduli before and after the preconsolidation pressure. The paper can hopefully work as a useful reference to engineers working on similar soils worldwide. |
| first_indexed | 2024-03-12T02:04:26Z |
| format | Article |
| id | doaj.art-a14ce2b40ad04e2b9c36675555416d87 |
| institution | Directory Open Access Journal |
| issn | 2471-2132 |
| language | English |
| last_indexed | 2024-03-12T02:04:26Z |
| publishDate | 2023-04-01 |
| publisher | AIMS Press |
| record_format | Article |
| series | AIMS Geosciences |
| spelling | doaj.art-a14ce2b40ad04e2b9c36675555416d872023-09-07T05:39:18ZengAIMS PressAIMS Geosciences2471-21322023-04-019225828410.3934/geosci.2023015Geotechnical characterization of index and deformation properties of Stockholm claysSolve Hov 0David Gaharia11. Norwegian Geotechnical Institute (NGI), Geotechnics and Natural Hazards, Høgskoleringen 9, 7034 Trondheim, Norway2. LabMind, Fannys väg 3,131 54 Nacka, Stockholm, SwedenThis paper describes the geotechnical characteristics of index and deformation properties of Stockholm clays. These clays exhibit large variations both geographically and with depth. The clays range from highly organic clays with high plasticity to silty clays with low plasticity. First, the geological conditions of the clays are outlined to qualitatively explain the typical soil stratigraphy encountered in the Stockholm area. Second, two large generic databases are presented, containing 3,500 and 1,600 data points, respectively. The data originates from routine testing and constant rate of strain oedometer tests conducted in commercial projects. The data is analyzed and compared with results from high quality block sampling. It is seen that a common feature of the clays are low undrained shear strengths, and consequently low yield stresses and oedometer moduli. Further, several deformation properties such as preconsolidation pressure and several oedometer moduli is shown to depend on the soils natural water content and its plasticity. Differences in sample quality is shown to highly affect some properties, highlighting the importance of quality sampling and handling of samples. Criteria for sample quality for this type of clay is proposed based on the oedometer moduli before and after the preconsolidation pressure. The paper can hopefully work as a useful reference to engineers working on similar soils worldwide.https://www.aimspress.com/article/doi/10.3934/geosci.2023015?viewType=HTMLclaydatabaseindex propertiesdeformation propertiessample quality |
| spellingShingle | Solve Hov David Gaharia Geotechnical characterization of index and deformation properties of Stockholm clays AIMS Geosciences clay database index properties deformation properties sample quality |
| title | Geotechnical characterization of index and deformation properties of Stockholm clays |
| title_full | Geotechnical characterization of index and deformation properties of Stockholm clays |
| title_fullStr | Geotechnical characterization of index and deformation properties of Stockholm clays |
| title_full_unstemmed | Geotechnical characterization of index and deformation properties of Stockholm clays |
| title_short | Geotechnical characterization of index and deformation properties of Stockholm clays |
| title_sort | geotechnical characterization of index and deformation properties of stockholm clays |
| topic | clay database index properties deformation properties sample quality |
| url | https://www.aimspress.com/article/doi/10.3934/geosci.2023015?viewType=HTML |
| work_keys_str_mv | AT solvehov geotechnicalcharacterizationofindexanddeformationpropertiesofstockholmclays AT davidgaharia geotechnicalcharacterizationofindexanddeformationpropertiesofstockholmclays |