Some Aspects of Submarine Slope Stability

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


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.


Debris Flow Pore Pressure Soft Clay Undrained Shear Strength Turbidity Current 
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  1. Andersen, K.H., Brown, S.F., Foss, I., Pool, J.H., and Rosenbrand, W.F. (1976), “Effect of Cyclic Loading on Clay Behaviour”. Proceedings, Conference on Design and Construction of Offshore Structures. Institution of Civil Engineers, London, England, 1976, pp. 75–79.Google Scholar
  2. Andresen, A. and L.Bjerrum (1967) Slides in subaqueous slopes in loose sand and silt. In. Marine Geotechnique. Ed. by A.F. Richards. Urbana, University of Illinois Press, pp. 221–239. Also publ. in: Norwegian Geotechnical Institute, Publ., 81.Google Scholar
  3. Bennet, R.H. (1977) “Pore-water pressure measurement: Mississippi Delta submarine sediments”. Marine Geotechnology, Vol. 2, pp. 177–189.CrossRefGoogle Scholar
  4. Bjerrum, L. (1971) Subaqueous slope failures in Norwegian fjords. Norwegian Geotechnical Institute. Publ. 88, pp. 1–8.Google Scholar
  5. Cluckey, E., D.A. Cacchione and C.H.Nelson (1980) Liquefaction potential of the Yukon prodelta, Bearing Sea. Offshore Technology Conference, 12. Houston 1980. Proceedings, Vol. 2, pp. 315–325.Google Scholar
  6. Doyle, E.H. (1973) Soil wave tank studies of marine soil instability. Offshore Technology Conference, 5. Houston 1974.Preprints, Vol. 2, pp. 753–766.Google Scholar
  7. Esrig, M.I. and R.C.Kirby (1977) Implications of gas content for prediction of stability of submarine slopes. Marine Geotechnology, Vol. 2, pp. 81–100.CrossRefGoogle Scholar
  8. Finn, W.D.L. and M.K.W. Lee (1979) Sea floor stability under seismic and wave loading. 25 p. American Society of Civil Engineers. National Convention, Boston 1979. Soil dynamics in the marine environment.Google Scholar
  9. Garrison, L.E. (1977) “The SEASWAB experiment”. Marine Geotechnology, Vol. 2, pp. 117–122.CrossRefGoogle Scholar
  10. Gibson, R.E. (1958) The progress of consolidation in a clay layer increasing in thickness with time. Gèotechnique, Vol. 8, pp. 171–182.CrossRefGoogle Scholar
  11. Hampton, M.A. (1972) The role of subaqueous debris flow in generating turbidity currents. Journal of Sedimentary Petrology, Vol. 42, No. 4, pp. 775–993.Google Scholar
  12. Henkel, D.J. (1970) The role of waves in causing submarine landslides. Géotechnicque, Vol. 20, No. 1, pp. 75–80.CrossRefGoogle Scholar
  13. Hirst, T.J. and A.F.Richards (1977) “In-situ pore pressure measurements in Mississippi Delta front sediments”. Marine Geotechnology, Vol. 2, pp. 191–205.CrossRefGoogle Scholar
  14. Johnson, A.M. (1970) Physical processes in geology. San Francisco, Freeman. 557 p.Google Scholar
  15. Karlsrud, K. (1979) Undersjøiske utglidninger og skred, 30 p. Norske sivi1ingeniørers forening. Skredfare og arealplanlegging; vurdering av faregrad og sikringstiltak; kurs. Lofthus i Hardanger 1979.Google Scholar
  16. Kuenen, Ph.H. (1964) Deep sea sands and ancient turbidites. In. Turbidities. Ed. by: A.H.Bouma and A.Brouwever. Amsterdam, Elsevier.Google Scholar
  17. Madsen, O.S. (1978) Wave induced pore pressures and effective stresses in a porous bed. Géotechnique, Vol. 28,. No. 4, pp. 377–393.CrossRefGoogle Scholar
  18. Middelton, G.V. (1966 a) Experiments on density and turbidity currents, I. Motion of the head. Canadian Journal of Earth Sciences, Vol. 3, pp. 523–546.CrossRefADSGoogle Scholar
  19. Middelton, G.V. (1966 b) Experiments on density and turbidity currents, II. Uniform flow of density currents. Canadian Journal of Earth Sciences, Vol. 3, pp. 627–637.Google Scholar
  20. Middelton, G.V. (1967) Experiments on density and turbidity currents, III. Deposition of the sediments. Canadian Journal of Earth Sciences, Vol. 4, pp. 475–505.CrossRefADSGoogle Scholar
  21. Middelton, G.V. and M.A.Hampton (1976) Subaqueous sediment transport and deposision by sediment gravity flows. Chapter 11 in: Marine sediment transport and environmental management. Ed. by: Stanley and Swift. American Geological Inst./ Wi1ey.Google Scholar
  22. Morgenstern, N.R. (1967) Submarine slumping and the initiation of turbidity currents. Marine Geotechnique. Ed. by: A.F.Richards. University of Illinois Press, pp. 189–220.Google Scholar
  23. Nataraja, M.S., H. Singh and D.Maloney (1980) Ocean wave-induced liquefaction analysis: a simplified procedure. International Symposium on Soils under Cyclic and Transient Loading, Swansea 1980. Proceedings, Vol. 2, pp. 509–516.Google Scholar
  24. Pantin, H.M. (1979) Interaction between velocity and effective density in turbidity flow; phase-plane analysis, with criteria for autosuspension. Marine Geology, Vol. 31, No. 1 /2, pp. 59–100.Google Scholar
  25. Sangrey, D.A., E.C.Cluckey and B.F.Molnia (1976) Geotechnical engineering analysis of underconsolidated sediments from Alaskan coastal waters. Offshore Technology Conference, 11. Houston 1979. Proceedings, Vol. 1, pp. 677–682.Google Scholar
  26. Schapery, R.A. and W.A.Dunlap (1978) Prediction of storm-induced sea bottom movement and platform forces. Offshore Technology Conference, 10. Houston 1978. Proceedings, Vol. 3, pp. 1789–1796.Google Scholar
  27. Seed, H.B. (1979) Soil liquefaction and cyclic mobility evaluation for level ground during earthquakes. American Society of Civil Engineers. Proceedings, Vol. 105, No. GT 2, pp. 201–255.Google Scholar
  28. Sills, G.C. (1980) Private communicationGoogle Scholar
  29. Terzaghi, K. (1956) Varieties of submarine slope failures. 41 p. Texas Conference on Soil Mechanics and Foundation Engineering, 8. Austin 1956. Proceedings. Also publ. in: Norwegian Geotechnical Institute. Publication, 25.Google Scholar
  30. Van der Knaap, W. and R.Eijpe (1968) Some experiments on the genesis of turbidity currents. Sedimentology, Vol. 11, pp. 115–124.CrossRefADSGoogle Scholar
  31. Wright, S.G. (1976) Analyses for wave induced sea-floor movements. Offshore Technology Conference, 8.Houston 1978. Preprints, Vol. 1, pp. 41–52.Google Scholar
  32. Yamamoto, T. (1978) Sea bed instability from waves. Offshore Technology Conference, 10. Houston 1978. Proceedings, Vol. 3, pp. 1819–1828.Google Scholar

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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