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SUMMARY:Division D Zoom Seminar - Experimental and Numerical Study on the 
 Use of Distributed Fibre Optic Sensing Technology for Sinkhole Detection -
  Gianluigi Della Ragione\, University of Naples Federico II
DTSTART:20200417T143000Z
DTEND:20200417T153000Z
UID:TALK141601@talks.cam.ac.uk
CONTACT:Dr Maria Marques de Carvalho
DESCRIPTION:Sinkholes are a geo-hazard\, which can form suddenly without o
 bvious pre-indication from soil surface settlement\, and can induce severe
  damages to infrastructures or loss of human lives. Monitoring the soil de
 formations would enable to minimize or avoid possible damage.  \nThis work
  explores the possibility of using Distributed Fibre Optic Sensors (DFOS) 
 as a solution for early warning detection of sinkhole formation\, with the
  main objective directed towards proving the effectiveness of this technol
 ogy in reading soil induced strains.\nSinkholes were simulated using trapd
 oor tests at 1g in controlled condition\, and soil movements were recorded
  using PIV analysis. Three layers of Fibre Optic cables were laid within t
 he specimen at different depths\, and analysed with the LUNA ODiSI 6100 an
 alyser. The tests show the ability of the DFOS in detecting soil movements
  and underline the typical signature strain profile expected during sinkho
 le formation. The magnitude of strains observed along the cables are lower
  compared with the results of PIV. In order to understand this discrepancy
 \, 3D FE analyses were carried out to study the behaviour of the cable wit
 hin the soil mass. Numerical results are in agreement with the experimenta
 l data and show that horizontal movements govern the strain profile within
  the cable\, proving that the soil-cable interface plays a crucial role.\n
 \n---------------------------------\n\nPlease email structures-admin@eng.c
 am.ac.uk if you would like to be sent the Zoom link for the seminar.
LOCATION:Zoom (email structures-admin@eng.cam.ac.uk for link)
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