EXPERIMENTAL INSIGHTS INTO INDUCED PARTIAL SATURATION METHODS DEVELOPED FOR LIQUEFACTION MITIGATION: DISTRIBUTION OF GAS BUBBLES
Saturated deposits of sandy soils may liquefy during an earthquake event, causing detrimental effects on the site and structures. Mitigation of liquefaction-induced damage is of the essence when the structures are expected to exceed the acceptable limits of safety and serviceability. Induced Partial...
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| Format: | Article |
| Language: | English |
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Eskişehir Osmangazi University
2022-12-01
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| Series: | Eskişehir Osmangazi Üniversitesi Mühendislik ve Mimarlık Fakültesi Dergisi |
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| Online Access: | https://dergipark.org.tr/tr/download/article-file/2212653 |
| _version_ | 1797909219974840320 |
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| author | Abdulhakim Zeybek |
| author_facet | Abdulhakim Zeybek |
| author_sort | Abdulhakim Zeybek |
| collection | DOAJ |
| description | Saturated deposits of sandy soils may liquefy during an earthquake event, causing detrimental effects on the site and structures. Mitigation of liquefaction-induced damage is of the essence when the structures are expected to exceed the acceptable limits of safety and serviceability. Induced Partial Saturation (IPS) has been recently proposed as a novel liquefaction countermeasure. In the present study, several laboratory tests were conducted on partially saturated sand models to offer insights into two IPS methods, paying more attention to the distribution of air/gas bubbles entrapped in pore spaces. For this purpose, loose deposits of partially saturated sand were prepared in transparent plexiglass boxes either injecting air or using a chemical substance. Digital images were recorded at different stages of the tests, which provided an opportunity to visualize the distribution of gas/air bubbles. Furthermore, moisture sensors were placed at different locations of sand models, allowing to capture the variation of the degree of saturation with time. Comprehensive analyses of the test data suggested that oxygen bubbles were generated through a reaction between water and chemical substance, and the distribution of oxygen bubbles was sufficiently uniform across the sand models. This method also allowed the preparation of sand models at the desired degrees of saturation. On the contrary, at 1-g injected air was observed to flow through a path of less resistance, and this technique was comparatively less successful in preparing sand models with uniformly distributed air bubbles and at lower degrees of saturation (i.e., below 90%). |
| first_indexed | 2024-04-10T11:05:01Z |
| format | Article |
| id | doaj.art-e4a87e01dce94359b3e8abf8b877a585 |
| institution | Directory Open Access Journal |
| issn | 2630-5712 |
| language | English |
| last_indexed | 2024-04-10T11:05:01Z |
| publishDate | 2022-12-01 |
| publisher | Eskişehir Osmangazi University |
| record_format | Article |
| series | Eskişehir Osmangazi Üniversitesi Mühendislik ve Mimarlık Fakültesi Dergisi |
| spelling | doaj.art-e4a87e01dce94359b3e8abf8b877a5852023-02-15T16:19:30ZengEskişehir Osmangazi UniversityEskişehir Osmangazi Üniversitesi Mühendislik ve Mimarlık Fakültesi Dergisi2630-57122022-12-0130330931710.31796/ogummf.1062953122EXPERIMENTAL INSIGHTS INTO INDUCED PARTIAL SATURATION METHODS DEVELOPED FOR LIQUEFACTION MITIGATION: DISTRIBUTION OF GAS BUBBLESAbdulhakim Zeybek0MUŞ ALPARSLAN ÜNİVERSİTESİSaturated deposits of sandy soils may liquefy during an earthquake event, causing detrimental effects on the site and structures. Mitigation of liquefaction-induced damage is of the essence when the structures are expected to exceed the acceptable limits of safety and serviceability. Induced Partial Saturation (IPS) has been recently proposed as a novel liquefaction countermeasure. In the present study, several laboratory tests were conducted on partially saturated sand models to offer insights into two IPS methods, paying more attention to the distribution of air/gas bubbles entrapped in pore spaces. For this purpose, loose deposits of partially saturated sand were prepared in transparent plexiglass boxes either injecting air or using a chemical substance. Digital images were recorded at different stages of the tests, which provided an opportunity to visualize the distribution of gas/air bubbles. Furthermore, moisture sensors were placed at different locations of sand models, allowing to capture the variation of the degree of saturation with time. Comprehensive analyses of the test data suggested that oxygen bubbles were generated through a reaction between water and chemical substance, and the distribution of oxygen bubbles was sufficiently uniform across the sand models. This method also allowed the preparation of sand models at the desired degrees of saturation. On the contrary, at 1-g injected air was observed to flow through a path of less resistance, and this technique was comparatively less successful in preparing sand models with uniformly distributed air bubbles and at lower degrees of saturation (i.e., below 90%).https://dergipark.org.tr/tr/download/article-file/2212653liquefactionpartial saturationair injectionchemical substanceshydrogen peroxidesıvılaşmakısmi doygunlukhava enjeksiyonukimyasal maddehidrojen peroksit |
| spellingShingle | Abdulhakim Zeybek EXPERIMENTAL INSIGHTS INTO INDUCED PARTIAL SATURATION METHODS DEVELOPED FOR LIQUEFACTION MITIGATION: DISTRIBUTION OF GAS BUBBLES Eskişehir Osmangazi Üniversitesi Mühendislik ve Mimarlık Fakültesi Dergisi liquefaction partial saturation air injection chemical substances hydrogen peroxide sıvılaşma kısmi doygunluk hava enjeksiyonu kimyasal madde hidrojen peroksit |
| title | EXPERIMENTAL INSIGHTS INTO INDUCED PARTIAL SATURATION METHODS DEVELOPED FOR LIQUEFACTION MITIGATION: DISTRIBUTION OF GAS BUBBLES |
| title_full | EXPERIMENTAL INSIGHTS INTO INDUCED PARTIAL SATURATION METHODS DEVELOPED FOR LIQUEFACTION MITIGATION: DISTRIBUTION OF GAS BUBBLES |
| title_fullStr | EXPERIMENTAL INSIGHTS INTO INDUCED PARTIAL SATURATION METHODS DEVELOPED FOR LIQUEFACTION MITIGATION: DISTRIBUTION OF GAS BUBBLES |
| title_full_unstemmed | EXPERIMENTAL INSIGHTS INTO INDUCED PARTIAL SATURATION METHODS DEVELOPED FOR LIQUEFACTION MITIGATION: DISTRIBUTION OF GAS BUBBLES |
| title_short | EXPERIMENTAL INSIGHTS INTO INDUCED PARTIAL SATURATION METHODS DEVELOPED FOR LIQUEFACTION MITIGATION: DISTRIBUTION OF GAS BUBBLES |
| title_sort | experimental insights into induced partial saturation methods developed for liquefaction mitigation distribution of gas bubbles |
| topic | liquefaction partial saturation air injection chemical substances hydrogen peroxide sıvılaşma kısmi doygunluk hava enjeksiyonu kimyasal madde hidrojen peroksit |
| url | https://dergipark.org.tr/tr/download/article-file/2212653 |
| work_keys_str_mv | AT abdulhakimzeybek experimentalinsightsintoinducedpartialsaturationmethodsdevelopedforliquefactionmitigationdistributionofgasbubbles |