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Preloading clayey deposit by vacuum pressure with cap-drain: Analyses versus performance
A method of improving soft clayey deposit by combining cap-drain (CPVD) with vacuum pressure is described. The method uses a surface or subsurface soil layer as a sealing layer with no need to place an air-tightening sheet on the ground surface. It is explained that the method has advantages for the following situations: (a) a higher air/water permeability layer at ground surface and (b) combining vacuum pressure with embankment load. A case history of consolidating a reclaimed clayey deposit by combining CPVD with vacuum pressure is analyzed and discussed. The site was in an under-consolidated state before starting the project. It is shown that the method is effective, and the method proposed by Chai et al. (Ground deformation induced by vacuum consolidation. J. of Geotechnical and Geoenvironmental Engineering, ASCE 131(12), 1552-1561) for calculating the vacuum-pressure-induced ground deformation is useful for the design of the vacuum consolidation project. The back-calculation shows that for this under-consolidated deposit, vacuum pressure caused plane strain type isotropic deformation near the ground surface.
Preloading clayey deposit by vacuum pressure with cap-drain: Analyses versus performance
A method of improving soft clayey deposit by combining cap-drain (CPVD) with vacuum pressure is described. The method uses a surface or subsurface soil layer as a sealing layer with no need to place an air-tightening sheet on the ground surface. It is explained that the method has advantages for the following situations: (a) a higher air/water permeability layer at ground surface and (b) combining vacuum pressure with embankment load. A case history of consolidating a reclaimed clayey deposit by combining CPVD with vacuum pressure is analyzed and discussed. The site was in an under-consolidated state before starting the project. It is shown that the method is effective, and the method proposed by Chai et al. (Ground deformation induced by vacuum consolidation. J. of Geotechnical and Geoenvironmental Engineering, ASCE 131(12), 1552-1561) for calculating the vacuum-pressure-induced ground deformation is useful for the design of the vacuum consolidation project. The back-calculation shows that for this under-consolidated deposit, vacuum pressure caused plane strain type isotropic deformation near the ground surface.
Preloading clayey deposit by vacuum pressure with cap-drain: Analyses versus performance
Vorbelastung eines tonigen Bodens durch Vakuumdruck mit Abdeckdrainage: Theorie-Praxis-Vergleich
Chai, Jinchun (author) / Miura, Norihiko (author) / Bergado, D.T. (author)
Geotextiles and Geomembranes ; 26 ; 220-230
2008
11 Seiten, 14 Bilder, 4 Tabellen, 20 Quellen
Article (Journal)
English
Preloading clayey deposit by vacuum pressure with cap-drain: Analyses versus performance
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