Stability of road embankments during thawing of soil base, taking into account the consolidation of soils

E.S. Ashpiz, T.S. Vavrinyuk

Dans les comptes rendus d’articles de la conférence: GeoManitoba 2012: 65th Canadian Geotechnical Conference

Session: M1C - Cold Regions Engineering I

ABSTRACT: We study the problem of stability of railway embankments constructed in areas of permafrost soil. At the same time great attention is paid to the consolidation of thawing soils, a significant influence on the formation of stress-strain state at the base of the subgrade. Calculations show that the replacement of the consolidation process thawing soils over time in the scheme of deformation during thawing is completed leads to a qualitatively different results. In the present study used a three-layer model of the base of embankments, consisting of thawed, thawing and frozen soils, accounting for the dynamics of thawing and the soil property changes. At the initial stage of thermal calculations solved the problem of determining the boundaries of motion thawing time. Calculations were carried out in the program PLAXIS. KEYWORDS analytical calculation; mathematical modeling; permafrost soil; railway embankment; consolidation; three-layer model of the base; weak thawing soils.

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