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Acoustic emission monitoring of a soil slope: comparisons with continuous deformation measurements

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journal contribution
posted on 16.10.2014, 10:39 by Alister Smith, Neil DixonNeil Dixon, Philip Meldrum, Edward Haslam, J. Chambers
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.

Funding

The UK Engineering and Physical Sciences Research Council (EPSRC) funded much of the Slope ALARMS research and development.

History

School

  • Architecture, Building and Civil Engineering

Published in

Géotechnique Letters

Volume

4

Issue

4

Pages

255 - 261

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.

Publisher

ICE Publishing

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution 4.0 International (CC BY 4.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/

Acceptance date

05/09/2014

Publication date

2014-10-06

Copyright date

2015

Notes

This is an Open Access article published with permission by the ICE under the CC-BY license (http://creativecommons.org/licenses/by/4.0/)

ISSN

2045-2543

eISSN

2045-2543

Language

en