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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/16091

Title: Quantification of landslide velocity from active waveguide generated acoustic emission
Authors: Smith, Alister
Dixon, Neil
Keywords: Acoustic Emission (AE)
Deformation
Instrumentation
Landslide
Slope instability
Issue Date: 2014
Publisher: NRC Research Press (© the authors)
Citation: SMITH, A. and DIXON, N., 2014. Quantification of landslide velocity from active waveguide generated acoustic emission. Canadian Geotechnical Journal, 52(4), pp. 413-425.
Abstract: Acoustic emission (AE) has become an established approach to monitor stability of soil slopes. However, the challenge has been to develop strategies to interpret and quantify deformation behaviour from the measured AE. AE monitoring of soil slopes commonly utilises an active waveguide which is installed in a borehole through the slope and comprises a metal waveguide rod or tube with a granular backfill surround. When the host slope deforms, the column of granular backfill also deforms and this generates AE that can propagate along the waveguide. Presented in the paper are results from the commissioning of dynamic shear apparatus used to subject full scale active waveguide models to simulated slope movements. The results confirm that AE rates generated are proportional to the rate of deformation, and the coefficient of proportionality that defines the relationship has been quantified (e.g. 4.4 x 105 for the angular gravel examined). The authors demonstrate that slope velocities can be quantified continuously in real-time through monitoring active waveguide generated AE during a slope failure simulation. The results show that the technique can quantify landslide velocity to better than an order of magnitude (i.e. consistent with standard landslide movement classification) and can therefore be used to provide an early warning of slope instability through detecting and quantifying accelerations of slope movement.
Version: Accepted for publication
DOI: 10.1139/cgj-2014-0226
URI: https://dspace.lboro.ac.uk/2134/16091
Publisher Link: http://dx.doi.org/10.1139/cgj-2014-0226
Appears in Collections:Published Articles (Civil and Building Engineering)

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