(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


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


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.



INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

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

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