An insight on the experimental volumetric behaviour of gassy soils
Induced Partial Saturation (IPS) is one of the most innovative and promising countermeasures to mitigate soil liquefaction risk. Mechanical benefits of air/gas bubbles occluded within the pore water have been studied in the last decade through undrained cyclic tests on quasi-saturated (gassy) soils,...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2023-01-01
|
| Series: | E3S Web of Conferences |
| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/19/e3sconf_unsat2023_03010.pdf |
| _version_ | 1797835326337581056 |
|---|---|
| author | Mele Lucia Lirer Stefania Flora Alessandro |
| author_facet | Mele Lucia Lirer Stefania Flora Alessandro |
| author_sort | Mele Lucia |
| collection | DOAJ |
| description | Induced Partial Saturation (IPS) is one of the most innovative and promising countermeasures to mitigate soil liquefaction risk. Mechanical benefits of air/gas bubbles occluded within the pore water have been studied in the last decade through undrained cyclic tests on quasi-saturated (gassy) soils, demonstrating that the increased pore fluid compressibility prevents liquefaction triggering. The greater compressibility of the air bubbles rules the volumetric strains of gassy soils during seismic shaking reducing the build up of the pore water pressure. Mele et al., (2022) verified that, at the laboratory scale, due to lower frequencies of the applied cyclic loads, a non-negligible amount of soil volumetric strains is due to dissolution of air bubbles in the water (εv,diss). The outcomes of some simple compression tests carried out on a two-phase medium made of air/water confirm that such amount cannot be correctly computed with the Henry’s law, which considers the dissolution process of air into water in the hypothesis of continuous air phase. Experimental evidences highlighted that εv,diss is mainly ruled by the continuity of air phase (linked to the chosen experimental procedure), and it exceeds the theoretical previsions when air phase is discontinuous with single bubbles occluded in the fluid phase. |
| first_indexed | 2024-04-09T14:52:20Z |
| format | Article |
| id | doaj.art-aafa10f92ddd4cd38428ff053f1c8cf1 |
| institution | Directory Open Access Journal |
| issn | 2267-1242 |
| language | English |
| last_indexed | 2024-04-09T14:52:20Z |
| publishDate | 2023-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj.art-aafa10f92ddd4cd38428ff053f1c8cf12023-05-02T09:28:19ZengEDP SciencesE3S Web of Conferences2267-12422023-01-013820301010.1051/e3sconf/202338203010e3sconf_unsat2023_03010An insight on the experimental volumetric behaviour of gassy soilsMele Lucia0Lirer Stefania1Flora Alessandro2University of Napoli Federico II, Department of Civil, Architectural and Environmental EngineeringUniversity of Rome Guglielmo Marconi, Department of Engineering of SustainabilityUniversity of Napoli Federico II, Department of Civil, Architectural and Environmental EngineeringInduced Partial Saturation (IPS) is one of the most innovative and promising countermeasures to mitigate soil liquefaction risk. Mechanical benefits of air/gas bubbles occluded within the pore water have been studied in the last decade through undrained cyclic tests on quasi-saturated (gassy) soils, demonstrating that the increased pore fluid compressibility prevents liquefaction triggering. The greater compressibility of the air bubbles rules the volumetric strains of gassy soils during seismic shaking reducing the build up of the pore water pressure. Mele et al., (2022) verified that, at the laboratory scale, due to lower frequencies of the applied cyclic loads, a non-negligible amount of soil volumetric strains is due to dissolution of air bubbles in the water (εv,diss). The outcomes of some simple compression tests carried out on a two-phase medium made of air/water confirm that such amount cannot be correctly computed with the Henry’s law, which considers the dissolution process of air into water in the hypothesis of continuous air phase. Experimental evidences highlighted that εv,diss is mainly ruled by the continuity of air phase (linked to the chosen experimental procedure), and it exceeds the theoretical previsions when air phase is discontinuous with single bubbles occluded in the fluid phase.https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/19/e3sconf_unsat2023_03010.pdf |
| spellingShingle | Mele Lucia Lirer Stefania Flora Alessandro An insight on the experimental volumetric behaviour of gassy soils E3S Web of Conferences |
| title | An insight on the experimental volumetric behaviour of gassy soils |
| title_full | An insight on the experimental volumetric behaviour of gassy soils |
| title_fullStr | An insight on the experimental volumetric behaviour of gassy soils |
| title_full_unstemmed | An insight on the experimental volumetric behaviour of gassy soils |
| title_short | An insight on the experimental volumetric behaviour of gassy soils |
| title_sort | insight on the experimental volumetric behaviour of gassy soils |
| url | https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/19/e3sconf_unsat2023_03010.pdf |
| work_keys_str_mv | AT melelucia aninsightontheexperimentalvolumetricbehaviourofgassysoils AT lirerstefania aninsightontheexperimentalvolumetricbehaviourofgassysoils AT floraalessandro aninsightontheexperimentalvolumetricbehaviourofgassysoils AT melelucia insightontheexperimentalvolumetricbehaviourofgassysoils AT lirerstefania insightontheexperimentalvolumetricbehaviourofgassysoils AT floraalessandro insightontheexperimentalvolumetricbehaviourofgassysoils |