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(Article of periodic en Anglais - 2012)

Document title

Centrifuge modelling of hillslope debris flow initiation

Authors(s) and Affiliation(s)

MILNE F.D. (1) ; BROWN M.J. (1) ; KNAPPETT J.A. (1) ; DAVIES M.C.R. (2) ;
(1) Div. of Civil Engineering, Univ., Scotland, Dundee, ROYAUME-UNI
(2) Fac. of Engineering, Univ., Auckland, NOUVELLE-ZELANDE

Abstract

The tests were carried out on model slopes consisting of soils with known properties prepared with constant initial density and material thickness. The results showed that soils with a higher silt fraction can sustain a higher increase in pore water pressure and thus a greater reduction in effective stress before failure is induced. This suggests that sand rich soils with lower fines content are geotechnically more susceptible to slope failure and that observed higher spatial frequencies of debris flow on slopes with coarse grained bedrocks can be partially explained in terms of lower critical pore pressure failure thresholds amongst the sandier soil matrixes produced from such lithologies. Differences in rates of water ingress into the model soils required to trigger a critical rise in pore pressures during the tests provide insights into the varying synoptic conditions and antecedent rainfall characteristics that are likely to trigger debris flows in different soil types

Source

Article of periodic

published at : Catena / ISSN 0341-8162

Editor : Catena, Cremlingen-Destedt - ALLEMAGNE (1973)

Millesime : 2012, vol. 92 [pp. 162-171]

Bibliographic references : 48 ref.

Collation : 12 fig., 5 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 16767

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1016/j.catena.2011.12.001

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2012
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