Effect of fines content on instability behavior of loose silt-sands containing gas bubbles

Chamika K. Haththotuwa, Jocelyn L.H. Grozic

In the proceedings of: GEO2011: 64th Canadian Geotechnical Conference, 14th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, 5th Pan-American Conference on Teaching and Learning of Geotechnical Engineering

Session: Other General

ABSTRACT: Submarine and offshore slope failures are commonly encountered in silt-sand soils. Investigations on the cause of submarine slope failures have confirmed the presence of gas bubbles, especially during tidal variations have contributed to the liquefaction of silt-sands. However, lab-scale experiments to date have focused on pure sands, both saturated and gassy, and it is these results that are used to simulate field conditions. The research work presented in this paper aims at study the instability behavior of silt-sands containing gas bubbles under undrained monotonic loading. The study confirms loose silt-sands containing gas bubbles at different fines content experience strain softening behavior and posses unique instability curves.

RÉSUMÉ: Sous-marins et ruptures de pente offshore sont couramment rencontrées dans les sols de limon et de sable. Les enquêtes sur la cause des glissements de terrain sous-marins ont confirmé la présence de bulles de gaz, en particulier lors des variations de marée ont contribué à la liquéfaction de la vase-sables. Toutefois, des expériences de laboratoire échelle à ce jour ont porté sur les sables purs, à la fois saturé et gazeux, et ce sont ces résultats qui sont utilisés pour simuler les conditions de terrain. Les travaux de recherche présentés dans cet article vise à étudier le comportement d'instabilité de limon-sables contenant des bulles de gaz sous chargement monotone non drainée. L'étude confirme lâche limon-sables contenant des bulles de gaz à des amendes différentes souche expérience contenu comportement adoucissant et possède des courbes de l'instabilité unique.

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Cite this article:
Chamika K. Haththotuwa; Jocelyn L.H. Grozic (2011) Effect of fines content on instability behavior of loose silt-sands containing gas bubbles in GEO2011. Ottawa, Ontario: Canadian Geotechnical Society.

@article{GEO11Paper731,author = Chamika K. Haththotuwa; Jocelyn L.H. Grozic ,title = Effect of fines content on instability behavior of loose silt-sands containing gas bubbles ,year = 2011}