Mots-clés
Alpes ; Dynamique de versant ; Dégel ; Eau du sol ; Graubünden ; Montagne ; Mouvement de masse ; Périglaciaire ; SuisseAlps (The) ; Graubünden ; Mass movement ; Mountain ; Periglacial features ; Slope dynamics ; Soil water ; Switzerland ; ThawingAgua del suelo ; Alpes ; Deshielo ; Dinámica de vertiente ; Montaña ; Movimiento de masa ; Periglaciar ; SuizaThaw-consolidation effects on the stability of alpine talus slopes in permafrost
Auteur(s) et Affiliation(s)
BOMMER, C.
HSR - Univ. of Applied Sciences, Rapperswil, Suisse
FITZE, P.
HSR - Univ. of Applied Sciences, Rapperswil, Suisse
SCHNEIDER, H.
HSR - Univ. of Applied Sciences, Rapperswil, Suisse
Description :
The relative contributions of thaw consolidation and slope-parallel seepage to the generation of overall porewater pressure and resultant potential changes in slope stability are determined in 2 case studies of thawing soils. The first study concerns experimental slopes of frozen silt inclined at 12° and 24° that thawed during scaled centrifuge modelling reported by Harris et al. (2008). The second study concerns a natural slope near Pontresina, eastern Swiss Alps, of coarse-grained talus inclined at 37° and overlying fine-grained soil that contains the permafrost table. In both cases, seepage parallel to the slope was found to contribute much more to the excess porewater pressures in the thawing soils than did thaw consolidation. This suggests that the effects of thaw consolidation on the stability of alpine talus slopes in mountain permafrost may have only minor significance.
Type de document :
Article de périodique
Source :
Permafrost and periglacial processes, issn : 1045-6740, 2012, vol. 23, n°. 4, p. 267-276, nombre de pages : 10, Références bibliographiques : 1 p.
Date :
2012
Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley
Langue :
Anglais
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)