Dixon Hill Kavanagh 2003.pdf (8.55 MB)

Acoustic emission monitoring of slope instability: development of an active waveguide system

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journal contribution
posted on 13.08.2012 by Neil Dixon, Roger Hill, John Kavanagh
This paper introduces the concept of using active waveguides as part of an acoustic emission monitoring system for assessing the stability of soil slopes. In soil, acoustic emissions are generated by inter-particle friction, and hence the detection of acoustic emission is an indication of straining. The components of a field monitoring system are introduced, and the factors controlling design and performance of waveguides are discussed. It is proposed that active waveguides (i.e. those that generate acoustic emission when deformed by the host soil) can be used as an efficient method of obtaining signals from depth within a deforming soil body. The results of laboratory tests conducted to validate the active waveguide model are presented. The role played by the soil surrounding the steel tube waveguide is highlighted. Results from two full-scale field trials that involved monitoring unstable slopes provide evidence for the relationship between detected acoustic emission and slope deformation rate. It is shown that active waveguides in conjunction with relevant signal processing methods can be used to provide an early indication of slope instability.



  • Architecture, Building and Civil Engineering


DIXON, N., HILL, R. and KAVANAGH, J., 2003. Acoustic emission monitoring of slope instability: development of an active waveguide system. Proceedings of the Institution of Civil Engineers - Geotechnical Engineering, 156 (2), pp.83-95.


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This article was published in the journal Proceedings of ICE: Geotechnical Engineering [© Institution of Civil Engineers]: www.geotechnicaljournal.com. Permission is granted by ICE Publishing to print one copy for personal use. Any other use of these PDF files is subject to reprint fees.