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Some Aspects of Submarine Slope Stability

  • Kjell Karlsrud
  • Lewis Edgers
Part of the NATO Conference Series book series (NATOCS, volume 6)

Abstract

This paper critically summarizes existing methods for analysing marine slopes under wave and earthquake loadings. Static limiting equilibrium, static deformation, liquefaction, and full dynamic analyses are summarized. Methods for analyzing the effects of underconsolidation in rapidly accumulating or gaseous sediments are described. Recent theoretical developments which account for the effects of porewater compressibility and seafloor compressibility and permeability on wave induced bottom pressures are reviewed. The behaviour of a submarine slope after an instability develops remains the area of greatest uncertainty in marine slope stability problems. In particular, the conditions of grain size, soil mass density, velocity, slope angle, etc. for transformation of a limited instability to a flow or turbidity current are very poorly understood. Examples of coastal slides in Norway, in loose sands and soft clays are presented. These cases illustrate possible triggering mechanisms, and the importance of progressive and retrogressive action in the rapid downslope transport of large masses of material. There is a great need to develop data from well documented cases of submarine slope instabilities in order to better evaluate and calibrate the available analyses.

Keywords

Debris Flow Pore Pressure Soft Clay Undrained Shear Strength Turbidity Current 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1982

Authors and Affiliations

  • Kjell Karlsrud
    • 1
  • Lewis Edgers
    • 2
  1. 1.Norwegian Geotechnical InstituteOsloNorway
  2. 2.Tufts UniversityMedfordUSA

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