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Title: Acoustic emission monitoring of a soil slope: comparisons with continuous deformation measurements
Authors: Smith, Alister
Dixon, Neil
Meldrum, Philip
Haslam, Edward
Chambers, J.
Keywords: Deformation
Field instrumentation
Issue Date: 2014
Publisher: ICE Publishing
Citation: SMITH, A. ... et al, 2014. Acoustic emission monitoring of a soil slope: comparisons with continuous deformation measurements. Geotechnique Letters, 4 (4), pp.255-261.
Abstract: Acoustic emission (AE) has become an established approach to monitor the stability of soil slopes. However, the challenge has been to develop strategies to interpret and quantify deformation behaviour from the measured AE. This paper presents the first comparison of continuous AE (measured using an active waveguide) and continuous subsurface deformation measurements. The active waveguide is installed in a borehole through a 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, generating AE that can propagate along the waveguide. This paper presents results from a field trial at a reactivated soil slope in North Yorkshire, UK. The measurements confirm that AE rates generated are directly proportional to the velocity of slope movement (e.g. the AE rate versus velocity relationship determined for a series of slope movement events produced an R2 value of 0?8) and demonstrate the performance of AE monitoring of active waveguides to provide continuous information on slope displacements and displacement rates with high temporal resolution.
Description: This is an Open Access article published with permission by the ICE under the CC-BY license. (http://creativecommons.org/licenses/by/4.0/)
Sponsor: The UK Engineering and Physical Sciences Research Council (EPSRC) funded much of the Slope ALARMS research and development.
Version: Published
DOI: 10.1680/geolett.14.00053
URI: https://dspace.lboro.ac.uk/2134/16094
Publisher Link: http://dx.doi.org/10.1680/geolett.14.00053
Appears in Collections:Published Articles (Civil and Building Engineering)

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