Strength of a carbonate silt at the solid-fluid transition and submarine landslide run-out

Nathalie Boukpeti, David White, Mark Randolph, N.P. Boylan

Research output: Chapter in Book/Conference paperConference paper

2 Citations (Scopus)

Abstract

© 2015 Taylor & Francis Group, London. Submarine landslide run-out is governed by the rheology of the sediment as it evolves from a soil to a viscous fluid. It has been shown previously that the geotechnical characterization of fine-grained sediments can be extended into the liquid range in a continuous fashion (Boukpeti et al. 2012). In this paper, we present the results of strength measurements on a carbonate silt over a wide range of water contents and compare them with results reported previously for two other soils.We then show that a reasonable estimate of submarine slide run-out can be obtained from a simplified analysis based on the energy dissipation through sliding at the base of the slide. Results of the simplified analysis are validated through comparison with run-out predictions obtained using the one-dimensional depth-averaged modelling softwareUWA-SM3. Using a simple formulation to account for water entrainment in the run-out analysis, the influence of the soil rheology on the final run-out is demonstrated. In this case, difference in the rheology of the carbonate silt compared to the non-carbonate fine-grained soils leads to a stronger influence of water entrainment on run-out distance.
Original languageEnglish
Title of host publicationFrontiers in Offshore Geotechnics III
Subtitle of host publicationProceedings Of The Third International Symposium On Frontiers In Offshore Geotechnics
EditorsVaughan Meyer
Place of PublicationLondon, UK
PublisherCRC Press
Pages1043-1048
VolumeN/A
Edition1
ISBN (Electronic)9781315675510
ISBN (Print)9781138028487
DOIs
Publication statusPublished - 2015
Event3rd International Symposium on Frontiers in Offshore Geotechnics - Norway, Oslo, Norway
Duration: 10 Jun 201512 Jun 2015
Conference number: 3

Conference

Conference3rd International Symposium on Frontiers in Offshore Geotechnics
Abbreviated titleISFOG
CountryNorway
CityOslo
Period10/06/1512/06/15

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    Boukpeti, N., White, D., Randolph, M., & Boylan, N. P. (2015). Strength of a carbonate silt at the solid-fluid transition and submarine landslide run-out. In V. Meyer (Ed.), Frontiers in Offshore Geotechnics III: Proceedings Of The Third International Symposium On Frontiers In Offshore Geotechnics (1 ed., Vol. N/A, pp. 1043-1048). CRC Press. https://doi.org/10.1201/b18442-154