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(Article of periodic en Anglais - 2012)

Document title

Limits on the validity of infinite length assumptions for modelling shallow landslides

Authors(s) and Affiliation(s)

MILLEDGE D.G. (1) ; GRIFFITHS D.V. (2) ; LANE S.N. (3) ; WARBURTON J. (4) ;
(1) Dept. of Geography, Science Laboratories, Univ., Durham, ROYAUME-UNI
(2) Colorado School of Mines, Div. of Engineering, Golden, ETATS-UNIS
(3) Inst. de Géographie, Univ., Lausanne, SUISSE
(4) Dept. of Geography, Univ., Durham, ROYAUME-UNI

Abstract

The assumption that shallow landslides are infinitely long (in a downslope direction) is usually considered valid for natural landslides on the basis that they are generally long relative to their depth. However, this is rarely justified, because the critical length/depth (L/H) ratio below which edge effects become important is unknown. The AA. establish this critical L/H ratio by benchmarking infinite slope stability predictions against finite element predictions for a set of synthetic two-dimensional slopes, assuming that the difference between the predictions is due to error in the infinite slope method. The AA. test the infinite slope method for 6 different L/H ratios to find the critical ratio at which its predictions fall within 5% of those from the finite element method. They repeat these tests for 5000 synthetic slopes with a range of failure plane depths, pore water pressures, friction angles, soil cohesions, soil unit weights and slope angles characteristic of natural slopes. Results and discusion

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2012, vol. 37, no11 [pp. 1158-1166]

Bibliographic references : 1 p.

Collation : 7 fig., 1 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3235

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2013
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