Modelling the hysteresis in the velocity pattern of slow-moving earth flows : the role of excess pore pressure

Auteur :
VAN ASCH, T.W.J.

Description :
This paper describes the velocity pattern of a slow-moving earth flow containing a viscous shear band and a more or less rigid landslide body on top. To explain the hysteresis loop in the velocity pattern, the A. considers the role of excess pore pressure in the rheological behaviour of earth flow by means of a mechanistic model. He describes changes in lateral internal stresses due to a change in the velocity of the earth flow, which generates excess pore pressure followed by pore pressure dissipation. Model results are compared with a hysteresis in the velocity pattern, which was measured on the Valette landslide complex (French Alps).


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2005, vol. 30, n°. 4, p. 403-411, nombre de pages : 9, Collation : Illustration, Références bibliographiques : 20 ref.

Date :
2005

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley