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SUMMARY:Centrifuge modelling of the behaviour of geosynthetic-reinforced s
 oils above voids - Talia Da Silva\, CUED
DTSTART:20180201T160000Z
DTEND:20180201T164500Z
UID:TALK99106@talks.cam.ac.uk
CONTACT:Magdalena Charytoniuk
DESCRIPTION:The development of infrastructure above areas where there is t
 he potential for voids to occur\, for example due to sinkholes or the coll
 apse of underground mines\, requires the use of mitigation measures to lim
 it the impact of the voids. Similarly\, the closure of landfill facilities
  and development above historical landfills also requires mitigation from 
 the risk of voids due to collapse of waste and localised subsidence. In th
 ese applications\, sheets of fabric-like material\, called geosynthetics\,
  are included at the base to span the potential void and support the above
  material. \nA series of centrifuge tests were conducted to investigate th
 e deformation response when a void forms below a geosynthetic-reinforced s
 oil. The aim of this research was to develop the limited understanding of 
 the deformation mechanisms of soils and geosynthetics in response to the f
 ormation of a void\, as this is crucial to ensure that the design of these
  systems is representative of the expected behaviour.\nIn this seminar\, a
  comparison of the reinforced and unreinforced soil behaviour will be pres
 ented based on visual observations from the tests conducted. The reinforce
 d soil behaviour will be compared to the assumptions made in existing desi
 gn methods\, with indications as to where potential improvements the curre
 nt design methods can be made. Particular attention will be given to the p
 rediction of the soil arching effects\, expansion in the soil above the vo
 id\, the shape of the zone of subsidence\, and characterisation of the soi
 l surface settlement profile.
LOCATION: Cambridge University Engineering Department\, Lecture Room 5
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