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Acoustic emission monitoring in geotechnical element tests

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conference contribution
posted on 05.04.2019 by Alister Smith, T. Biller, Helen J. Heather-Smith, Neil Dixon, James A. Flint
Acoustic emission (AE) is high-frequency noise (>10kHz) generated by deforming materials. AE is widely used in many industries for non-destructive testing and evaluation; however, it is seldom used in geotechnical engineering, despite evidence of the benefits, because AE generated by particulate materials is highly complex and difficult to measure and interpret. This paper demonstrates that innovative AE instrumentation and measurement can enhance insights into geotechnical element tests. Results from a programme of triaxial compression and shear, large direct-shear and large permeameter experiments show that AE can be used to characterise mechanical and hydromechanical behaviour of soils and soil-structure interaction, including: dilative shear behaviour; transitions from pre- to post-peak shear strength; changes in strain rates; isotropic compression; unload-reload cycles of compression and shear; and seepage-induced internal instability phenomena.

Funding

Alister Smith acknowledges the support of an EPSRC Fellowship (EP/P012493/1). Tiago Biller acknowledges the support of a Loughborough University PhD studentship. Helen Heather-Smith acknowledges the support of a DTA PhD studentship.

History

School

  • Architecture, Building and Civil Engineering

Published in

Proceedings of the XVII European Conference on Soil Mechanics and Geotechnical Engineering

Citation

SMITH, A. ... et al, 2019. Acoustic emission monitoring in geotechnical element tests. IN: Proceedings of the XVII European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE 2019), Reykjavik, Iceland, 1-7 September 2019.

Publisher

International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE) © The authors and IGS

Version

AM (Accepted Manuscript)

Acceptance date

01/02/2019

Publication date

2019-09-01

Copyright date

2019

ISBN

9789935943613

Language

en

Location

Reykjavik, Iceland

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