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(Article of periodic en Anglais - 2013)

Document title

Occurrence of landsliding on slopes where flowsliding had previously occurred : An investigation in a loess platform, North-west China

Authors(s) and Affiliation(s)

XU L. (1) ; DAI F.C. (1) ; TU X.B. (1) ; JAVED I. (1 2) ; WOODWARD M.J. (3) ; JIN Y.L. (4) ; THAM L.G. (5) ;
(1) Inst. of Geology and Geophysics, CAS, Beijing, CHINE
(2) Dep. of Earth Sciences, COMSATS, Inst. of Information Technology, Abbottabad, PAKISTAN
(3) Haley & Aldrich, ETATS-UNIS
(4) North China Univ. of Water Resources and Electric Power, Zhengzhou, CHINE
(5) Dep. of Civil Engineering, Univ., Hong Kong, HONG-KONG

Abstract

Loess landslides are a recurring problem in South Jingyang platform, Shaanxi Province. Numerical modeling shows that flowslide occurrence causes conditions that increase shear stress and water content in the subsequent slopes. Both of these factors move the soil stress states towards its theoretical failure line. Under these conditions only small increases in water content can cause soil collapse. Wetting test results show that the loess can collapse suddenly as the water content gradually increases. Therefore, the wetting process induced by continued irrigation may result in the subsequent slides. During constant water content tests of the loess material soil shear strength increases with the development of specimen deformation. Therefore, slide mobilization, which may be a relatively slow process, is dependent on whether the wetting conditions exist. Finally, a slope evolution model for loess platforms is proposed in this study

Source

Article of periodic

published at : Catena / ISSN 0341-8162

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

Millesime : 2013, vol. 104 [pp. 195-209]

Bibliographic references : 43 ref.

Collation : 18 fig., 3 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 16767

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1016/j.catena.2012.11.010

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