THE USE OF ACOUSTIC EMISSION TO MONITOR THE STABILITY OF SOIL SLOPES

Slopes formed in strain softening soils, typically plastic clays and shales, can experience progressive failure and hence undergo deformation prior to collapse. In these types of material shear deformations in the order of a few millimetres may be sufficient to reduce substantially the shear strength to post peak values, and thus to result in failure. The earlier decreasing stability can be detected the better the chance that remedial measures can be carried out to arrest the ground movements and restore the required factor of safety. An alternative method which could be used to provide an early warning of instability, and which does not necessarily require measurements taken over a period of time would be of significant value. This paper provides information on an EPSRC funded research project which is presently in progress to develop such a system using measurements of acoustic emission (AE) to detect and assess pre-failure deformations. The basic AE instrumentation and data processing system are outlined, and information is provided on the field monitoring procedures presently being developed. A full scale field trial is described, and the initial results are presented. (A) For the covering abstract see IRRD 883023.

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 739-49

Subject/Index Terms

Filing Info

  • Accession Number: 00729297
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-7277-2513-0
  • Files: ITRD
  • Created Date: Dec 12 1996 12:00AM