NDLI: How Well Do We Understand Earthquake Induced Liquefaction?

Content Provider	Springer Nature Link
Author	Madabhushi, Gopal S. P. Haigh, Stuart K.
Copyright Year	2012
Abstract	Soil liquefaction following large earthquakes is a major contributor to damage to infrastructure and economic loss, as borne out by the earthquakes in Japan and New Zealand in 2011. While extensive research has been conducted on soil liquefaction and our understanding of liquefaction has been advancing, several uncertainties remain. In this paper the basic premise that liquefaction is an ‘undrained’ event will be challenged. Evidence will be offered based on dynamic centrifuge tests to show that rapid settlements occur both in level ground and for shallow foundations. It will also be shown that the definition of liquefaction based on excess pore pressure generation and the subsequent classification of sites as liquefiable and non-liquefiable is not satisfactory, as centrifuge test data shows that both loose and dense sand sites produce significant excess pore pressure. Experimental evidence will be presented that shows that the permeability of sands increases rapidly at very low effective stresses to allow for rapid drainage to take place from liquefied soil. Based on these observations a micro-mechanical view of soil liquefaction that brings together the Critical State view of soil liquefaction and the importance of dynamic loading will be presented.
Starting Page	150
Ending Page	160
Page Count	11
File Format	PDF
ISSN	09719555
Journal	Indian Geotechnical Journal
Volume Number	42
Issue Number	3
e-ISSN	22773347
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-07-15
Publisher Place	India
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Critical state Geoengineering, Foundations, Hydraulics Undrained Earthquakes Liquefaction Permeability
Content Type	Text
Resource Type	Article
Subject	Geotechnical Engineering and Engineering Geology

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