Consolidation analysis of soft ground with air-boosted vacuum preloading considering attenuation of vacuum and boost pressure
Abstract Air-boosted vacuum preloading (AVP), an innovative soil improvement methodology extensively employed in subgrade enhancement projects, demonstrates exceptional efficacy in accelerating soil consolidation processes and improving load-bearing characteristics of soft foundation. Current unders...
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| Format: | Article |
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Nature Portfolio
2025-07-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-04243-6 |
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| author | Weiliang Gao Lu Han Yanming Zhao Jinxin Sun Lulu Liu |
| author_facet | Weiliang Gao Lu Han Yanming Zhao Jinxin Sun Lulu Liu |
| author_sort | Weiliang Gao |
| collection | DOAJ |
| description | Abstract Air-boosted vacuum preloading (AVP), an innovative soil improvement methodology extensively employed in subgrade enhancement projects, demonstrates exceptional efficacy in accelerating soil consolidation processes and improving load-bearing characteristics of soft foundation. Current understanding remains constrained by insufficient theoretical exploration of AVP consolidation mechanisms, particularly regarding underdeveloped analytical frameworks. Therefore, this investigation establishes an analytical model for AVP-assisted consolidation incorporating attenuation of vacuum and boost pressure. Fundamental governing equations were formulated through rigorous analysis of vacuum load propagation patterns, accounting for pressure dissipation along both vertical and radial coordinates. The proposed solutions integrate PVD-induced soil disturbance effects and three-dimensional fluid migration patterns. Model validation was achieved through systematic degeneration analysis, confirming consistency with established solutions in specific boundary conditions. Parametric sensitivity analysis revealed significant correlations between consolidation efficiency and key operational variables when benchmarking against conventional models. Crucially, computational findings emphasize that neglecting pressure attenuation mechanisms leads to non-conservative estimates of consolidation progression rates. Enhancement of consolidation rate was observed with higher vacuum loading coefficients and increased Poisson ratios. A limitation section is also introduced to provide critical insights into improving the theoretical investigations on the consolidation of AVP-improved ground. |
| format | Article |
| id | doaj-art-cbaae7dc4661462da984da60c9b1a39b |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-cbaae7dc4661462da984da60c9b1a39b2025-08-20T03:37:22ZengNature PortfolioScientific Reports2045-23222025-07-0115111610.1038/s41598-025-04243-6Consolidation analysis of soft ground with air-boosted vacuum preloading considering attenuation of vacuum and boost pressureWeiliang Gao0Lu Han1Yanming Zhao2Jinxin Sun3Lulu Liu4School of Transportation Engineering, Huanghe Jiaotong UniversitySchool of Transportation Engineering, Huanghe Jiaotong UniversitySchool of Transportation Engineering, Huanghe Jiaotong UniversitySchool of Mechanics and Civil Engineering, China University of Mining and TechnologySchool of Mechanics and Civil Engineering, China University of Mining and TechnologyAbstract Air-boosted vacuum preloading (AVP), an innovative soil improvement methodology extensively employed in subgrade enhancement projects, demonstrates exceptional efficacy in accelerating soil consolidation processes and improving load-bearing characteristics of soft foundation. Current understanding remains constrained by insufficient theoretical exploration of AVP consolidation mechanisms, particularly regarding underdeveloped analytical frameworks. Therefore, this investigation establishes an analytical model for AVP-assisted consolidation incorporating attenuation of vacuum and boost pressure. Fundamental governing equations were formulated through rigorous analysis of vacuum load propagation patterns, accounting for pressure dissipation along both vertical and radial coordinates. The proposed solutions integrate PVD-induced soil disturbance effects and three-dimensional fluid migration patterns. Model validation was achieved through systematic degeneration analysis, confirming consistency with established solutions in specific boundary conditions. Parametric sensitivity analysis revealed significant correlations between consolidation efficiency and key operational variables when benchmarking against conventional models. Crucially, computational findings emphasize that neglecting pressure attenuation mechanisms leads to non-conservative estimates of consolidation progression rates. Enhancement of consolidation rate was observed with higher vacuum loading coefficients and increased Poisson ratios. A limitation section is also introduced to provide critical insights into improving the theoretical investigations on the consolidation of AVP-improved ground.https://doi.org/10.1038/s41598-025-04243-6ConsolidationAnalytical modelGround improvementPrefabricated vertical drainAir-boosted vacuum preloading |
| spellingShingle | Weiliang Gao Lu Han Yanming Zhao Jinxin Sun Lulu Liu Consolidation analysis of soft ground with air-boosted vacuum preloading considering attenuation of vacuum and boost pressure Scientific Reports Consolidation Analytical model Ground improvement Prefabricated vertical drain Air-boosted vacuum preloading |
| title | Consolidation analysis of soft ground with air-boosted vacuum preloading considering attenuation of vacuum and boost pressure |
| title_full | Consolidation analysis of soft ground with air-boosted vacuum preloading considering attenuation of vacuum and boost pressure |
| title_fullStr | Consolidation analysis of soft ground with air-boosted vacuum preloading considering attenuation of vacuum and boost pressure |
| title_full_unstemmed | Consolidation analysis of soft ground with air-boosted vacuum preloading considering attenuation of vacuum and boost pressure |
| title_short | Consolidation analysis of soft ground with air-boosted vacuum preloading considering attenuation of vacuum and boost pressure |
| title_sort | consolidation analysis of soft ground with air boosted vacuum preloading considering attenuation of vacuum and boost pressure |
| topic | Consolidation Analytical model Ground improvement Prefabricated vertical drain Air-boosted vacuum preloading |
| url | https://doi.org/10.1038/s41598-025-04243-6 |
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