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(Article of periodic en Anglais - 2013)

Document title

Landslide amplification by liquefaction of runout-path material after the 2008 Wenchuan (M 8.0) earthquake, China

Authors(s) and Affiliation(s)

WANG G. (1) ; HUANG R. (2) ; CHIGIRA M. (3) ; WU X. (4) ; LOURENÇO D.N. (5) ;
(1) Research Center on Landsides, Disaster Prevention Research Inst., univ., Kyoto, JAPON
(2) State Key lab. of Geo-hazard Prevention and Geo-environment Protection, Univ. of Technology, Chengdu, CHINE
(3) Disaster Prevention Research Inst., Univ., Kyoto, JAPON
(4) School of Civil Engineering, Southwest Jiaotong Univ., Chengdu, CHINE
(5) School of Earth and Ocean Sciences, Univ., Cardiff, ROYAUME-UNI

Abstract

During the 2008 Wenchuan earthquake, about 60 000 landslides were triggered. Among these, the most catastrophic was the Xiejiadian landslide in Pengzhou city. Through field investigation and laboratory testing, the AA. conclude that this landslide primarily formed from colluvial deposits in the valley and secondarily from failure of slopes in granitic rock located uphill. The AA. hypothesize that the main part of the landslide resulted from seismogenic liquefaction of valley colluvium, rather than from liquefaction potentially caused by undrained loading from the granitic slope failures impacting the colluvium. Therefore, they took samples from different areas of the landslide deposit and performed undrained cyclic shear tests on them in the laboratory. The results showed that the sandy soils that comprise most of the deposit are highly liquefiable under seismic loading. It is concluded that liquefaction of the colluvium in the valley during the earthquake was the main reason for this rapid long-runout landslide

Source

Article of periodic

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

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

Millesime : 2013, vol. 38, no3 [pp. 265-274]

Bibliographic references : 1 p.

Collation : 12 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.3277

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