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Submarine Slope Failures in Gassy Soils

[+] Author Affiliations
Shantanu Kar

Memorial University of Newfoundland, St. John’s, NL, Canada

Ryan Phillips

C-CORE, St. John’s, NL, Canada

Paper No. OMAE2015-41829, pp. V001T10A015; 7 pages
doi:10.1115/OMAE2015-41829
From:
  • ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 1: Offshore Technology; Offshore Geotechnics
  • St. John’s, Newfoundland, Canada, May 31–June 5, 2015
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-5647-5
  • Copyright © 2015 by ASME

abstract

This paper investigates the stability of a submarine gassy slope triggered by tidal variations. Under tidal variations on an unsaturated slope, failure may occur under specific combinations of increasing degree of saturation and soil permeability, and decreasing tidal period. A novel physical model test in a geotechnical centrifuge was undertaken of a submarine slope containing gassy sediments. The model preparation techniques, measurement systems and preliminary results are presented. The response observed in the model test is discussed and further developments proposed. Existing numerical simulations may provide a basis for verification and validation of future physical model test results.

Copyright © 2015 by ASME

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