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SUMMARY:The Mechanics of Unsaturated Sand - James Fern\, University of Cam
 bridge\, Department of Engineering
DTSTART:20150611T154500Z
DTEND:20150611T163000Z
UID:TALK59204@talks.cam.ac.uk
CONTACT:Anama Lowday
DESCRIPTION:It is well known that partial saturation enhances the mechanic
 al behaviour of soils. Despite major advances in the past two decades\, li
 ttle is known on the dilatancy characteristics of unsaturated soils.\nIn t
 his presentation\, the stress-dilatancy behaviour of an unsaturated silica
  sand will be explored and discussed. It will be shown that the strength o
 f an unsaturated sand can be predicted by considering both the critical st
 ate strength and the dilatancy characteristics. Furthermore\, it will be s
 hown that the prediction of the maximum dilatancy rate with a state index\
 , such as the relative dilatancy index (Bolton\, 1986)\, can be done by co
 nsidering the enhancement of the soil fabric by partial saturation. \nThes
 e\nfindings have been applied to a simple constitutive model for sand call
 ed NorSand (Jefferies\, 1993)  which allow it predict the behaviour of uns
 aturated sand. Finally\, a few examples of applications will be presented.
 \n
LOCATION: Cambridge University Engineering Department\, Lecture Room 5
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