The Influence of Sand Pore Structure on Air Migration During Air-Injected Desaturation Process
The air injection method serves as a liquefaction mitigation technique to improve the liquefaction resistance of the foundations by decreasing the degree of saturation. To investigate the desaturation effect of this technique in various soil strata of the foundation, thin plate model tests were cond...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-11-01
|
| Series: | Buildings |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-5309/14/12/3730 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1846105483673337856 |
|---|---|
| author | Yumin Chen Chengzhao Qin Saeed Sarajpoor Runze Chen Yi Han Zijun Wang |
| author_facet | Yumin Chen Chengzhao Qin Saeed Sarajpoor Runze Chen Yi Han Zijun Wang |
| author_sort | Yumin Chen |
| collection | DOAJ |
| description | The air injection method serves as a liquefaction mitigation technique to improve the liquefaction resistance of the foundations by decreasing the degree of saturation. To investigate the desaturation effect of this technique in various soil strata of the foundation, thin plate model tests were conducted, considering the impacts of gradation and relative density, to visualize the air migration process and distribution. The findings reveal the following: (1) The air migration process, delineated by air injection parameters, comprises four distinct phases, with stages II and III notably influenced by the pore structure; (2) air migration is governed by the pore throat dimensions, particle arrangement, and connectivity within the pore structure, exhibiting two predominant patterns: channel flow, primarily driven by inertial forces, and chamber flow, predominantly influenced by viscous and capillary forces; (3) referring to the air injection port, the gas phase distribution within the sand samples is consistent in the horizontal direction but not in the vertical direction. The concentration area and uniformity of the gas phase distribution are controlled by the pore structure. These results suggest potential enhancements in the positioning of air injection ports within complex soil layers, as well as improvements in the construction process, both aimed at optimizing the desaturation effect. |
| format | Article |
| id | doaj-art-38f69350f2e74e398b45141ffb6a4849 |
| institution | Kabale University |
| issn | 2075-5309 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj-art-38f69350f2e74e398b45141ffb6a48492024-12-27T14:15:09ZengMDPI AGBuildings2075-53092024-11-011412373010.3390/buildings14123730The Influence of Sand Pore Structure on Air Migration During Air-Injected Desaturation ProcessYumin Chen0Chengzhao Qin1Saeed Sarajpoor2Runze Chen3Yi Han4Zijun Wang5College of Civil Engineering and Transportation, Hohai University, Nanjing 210098, ChinaCollege of Civil Engineering and Transportation, Hohai University, Nanjing 210098, ChinaSchool of Smart Underground Space Research Center, Institute for Smart City of Chongqing University in Liyang, Liyang 213300, ChinaCollege of Civil Engineering and Transportation, Hohai University, Nanjing 210098, ChinaCollege of Civil Engineering and Transportation, Hohai University, Nanjing 210098, ChinaCollege of Civil Engineering and Transportation, Hohai University, Nanjing 210098, ChinaThe air injection method serves as a liquefaction mitigation technique to improve the liquefaction resistance of the foundations by decreasing the degree of saturation. To investigate the desaturation effect of this technique in various soil strata of the foundation, thin plate model tests were conducted, considering the impacts of gradation and relative density, to visualize the air migration process and distribution. The findings reveal the following: (1) The air migration process, delineated by air injection parameters, comprises four distinct phases, with stages II and III notably influenced by the pore structure; (2) air migration is governed by the pore throat dimensions, particle arrangement, and connectivity within the pore structure, exhibiting two predominant patterns: channel flow, primarily driven by inertial forces, and chamber flow, predominantly influenced by viscous and capillary forces; (3) referring to the air injection port, the gas phase distribution within the sand samples is consistent in the horizontal direction but not in the vertical direction. The concentration area and uniformity of the gas phase distribution are controlled by the pore structure. These results suggest potential enhancements in the positioning of air injection ports within complex soil layers, as well as improvements in the construction process, both aimed at optimizing the desaturation effect.https://www.mdpi.com/2075-5309/14/12/3730desaturation methodair migrationgas phase distributionpore structuremicroscopic mechanismimage processing |
| spellingShingle | Yumin Chen Chengzhao Qin Saeed Sarajpoor Runze Chen Yi Han Zijun Wang The Influence of Sand Pore Structure on Air Migration During Air-Injected Desaturation Process Buildings desaturation method air migration gas phase distribution pore structure microscopic mechanism image processing |
| title | The Influence of Sand Pore Structure on Air Migration During Air-Injected Desaturation Process |
| title_full | The Influence of Sand Pore Structure on Air Migration During Air-Injected Desaturation Process |
| title_fullStr | The Influence of Sand Pore Structure on Air Migration During Air-Injected Desaturation Process |
| title_full_unstemmed | The Influence of Sand Pore Structure on Air Migration During Air-Injected Desaturation Process |
| title_short | The Influence of Sand Pore Structure on Air Migration During Air-Injected Desaturation Process |
| title_sort | influence of sand pore structure on air migration during air injected desaturation process |
| topic | desaturation method air migration gas phase distribution pore structure microscopic mechanism image processing |
| url | https://www.mdpi.com/2075-5309/14/12/3730 |
| work_keys_str_mv | AT yuminchen theinfluenceofsandporestructureonairmigrationduringairinjecteddesaturationprocess AT chengzhaoqin theinfluenceofsandporestructureonairmigrationduringairinjecteddesaturationprocess AT saeedsarajpoor theinfluenceofsandporestructureonairmigrationduringairinjecteddesaturationprocess AT runzechen theinfluenceofsandporestructureonairmigrationduringairinjecteddesaturationprocess AT yihan theinfluenceofsandporestructureonairmigrationduringairinjecteddesaturationprocess AT zijunwang theinfluenceofsandporestructureonairmigrationduringairinjecteddesaturationprocess AT yuminchen influenceofsandporestructureonairmigrationduringairinjecteddesaturationprocess AT chengzhaoqin influenceofsandporestructureonairmigrationduringairinjecteddesaturationprocess AT saeedsarajpoor influenceofsandporestructureonairmigrationduringairinjecteddesaturationprocess AT runzechen influenceofsandporestructureonairmigrationduringairinjecteddesaturationprocess AT yihan influenceofsandporestructureonairmigrationduringairinjecteddesaturationprocess AT zijunwang influenceofsandporestructureonairmigrationduringairinjecteddesaturationprocess |