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Analytical study of the failure mode and pullout capacity of suction anchors in clay

  • Liu, Haixiao (School of Civil Engineering, Tianjin University) ;
  • Wang, Chen (School of Civil Engineering, Tianjin University) ;
  • Zhao, Yanbing (School of Civil Engineering, Tianjin University)
  • Received : 2013.05.01
  • Accepted : 2013.06.07
  • Published : 2013.06.25

Abstract

Suction anchors are widely adopted in mooring systems. However there are still challenges in predicting the failure mode and ultimate pullout capacity of the anchor. Previously published methods for predicting the inclined pullout capacity of suction anchors are mainly based on experimental data or the FEM analysis. In the present work, an analytical method that is capable of predicting the failure mode and ultimate pullout capacity of the suction anchor in clay under inclined loading is developed. This method is based on a rational mechanical model for suction anchors and the knowledge of the mechanism that the anchor fails in seabed soils. In order to examine the analytical model, the failure angle and pullout capacity of suction anchors from FEM simulation, numerical solution and laboratory tests in uniform and linear cohesive soils are employed to compare with the theoretical predictions and the agreement is satisfactory. An analytical method that can evaluate the optimal position of the attachment point is also proposed in the present study. The present work proves that the failure mode and pullout capacity of suction anchors can be reasonably determined by the developed analytical method.

Keywords

References

  1. Advanced Geomechanics (2001), Suction pile analysis code: AGSPANC Users' Manual, Version 3.0. Advanced Geomechanics Internal Report, Perth.
  2. Andersen, K.H. and Jostad, H.P. (1999), "Foundation design of skirted foundations and anchors in clay", Proceedings of the 31st Annual Offshore Technology Conference, Houston, USA, May.
  3. Aubeny, C.P., Han, S.W. and Murff, J.D. (2003), "Inclined load capacity of suction caissons", Int. J. Numer. Anal. Meth. Geomech., 27(14), 1235-1254. https://doi.org/10.1002/nag.319
  4. Audibert, J.M.E., Clukey, E. and Huang, J. (2003), "Suction caisson installation at Horn Mountain - a case history", Proceedings of the 13th International Offshore and Polar Engineering Conference, Honolulu, USA, May.
  5. Byrne, B.W., Houlsby, G.T., Martin, C.M. and Fish, P.M. (2002), "Suction caisson foundations for offshore wind turbines", Wind Eng., 26(3), 145-155. https://doi.org/10.1260/030952402762056063
  6. Cho, Y., Lee, T.H., Chung, E.S. and Bang, S. (2003), "Field tests on pullout loading capacity of suction piles in clay", Proceedings of the 22nd International Conference on Offshore Mechanics and Arctic Engineering, Cancun, Mexico, June.
  7. Clukey, E.C. and Morrison, M.J. (1993), "A centrifuge and analytical study to evaluate suction caissons for TLP applications in the Gulf of Mexico", Design and Performance of Deep Foundations: Piles and Piers in Soil and Soft Rock, ASCE Geotechnical Special Publication, No. 38, 141-156.
  8. Clukey, E.C., Aubeny, C.P. and Murff, J.D. (2003), "Comparison of analytical and centrifuge model tests for suction caissons subjected to combined loads", Proceedings of the 22nd International Conference on Offshore Mechanics and Arctic Engineering, Cancun, Mexico, June.
  9. Christophersen, H.P., Bysveen, S. and Stove, O.J. (1992), "Innovation foundation systems selected for the Snorre Field", Proceedings of the 6th International Conference on the Behaviour of Offshore Structures, London, England, July.
  10. Dendani, H. and Colliat, J.L. (2002), "Girassol: design analysis and installation of the suction anchors", Proceedings of the 34th Annual Offshore Technology Conference, Houston, USA, May.
  11. Det Norske Veritas (2005), Geotechnical design and installation of suction anchors in clay, Recommended Practice, DNV-RP-E303, Oslo.
  12. EI-sherbiny, R.M. (2005), Performance of suction caisson anchors in normally consolidated Clay, Ph.D. Dissertation, The University of Texas at Austin, Texas.
  13. Hogervorst, J.R. (1980), "Field trials with large diameter suction piles", Proceedings of the 12th Annual Offshore Technology Conference, Houston, USA, May.
  14. House, A.R. and Randolph, M.F. (2001), "Installation and pull-out of stiffened suction caissons in cohesive sediments", Proceedings of the 11th International Offshore and Polar Engineering Conference, Stavanger, Norway, June.
  15. Huang, J., Cao, J. and Audibert, J.M.E. (2003), "Geotechnical design of suction caisson in clay", Proceedings of the 13th International Offshore and Polar Engineering Conference, Houston, USA, May.
  16. Keaveny, J.M., Hansen, S.B., Madshus, C. and Dyvik, R. (1994), "Horizontal capacity of large-scale model anchors", Proceedings of the 13th International Conference on Soil Mechanics and Foundation Engineering, New Delhi, India, January.
  17. Liu, H.X., Zhang, W., Liu, C.L. and Hu, C. (2012), "Movement direction of drag anchors in seabed soils", Appl. Ocean Res., 34, 78-95. https://doi.org/10.1016/j.apor.2011.09.007
  18. Martin. C.M. (2001), "Vertical bearing capacity of skirted circular foundations on Tresca soil", Proceedings of the 15th International Conference on Soil Mechanics and Geotechnical Engineering, Istanbul, Turkey, August.
  19. Murff, J.D. and Hamilton, J.M. (1993), "P-ultimate for undrained analysis of laterally loaded piles", J. Geotech. Eng., 119(1), 91-107. https://doi.org/10.1061/(ASCE)0733-9410(1993)119:1(91)
  20. Randolph, M.F. and Houlsby, G.T. (1984), "The Limiting pressure on a circular pile loaded laterally in cohesive soil", Geotechnique, 34(4), 613-623. https://doi.org/10.1680/geot.1984.34.4.613
  21. Randolph, M.F. and House, A. (2002), "Analysis of suction caisson capacity in clay", Proceedings of the 34th Annual Offshore Technology Conference, Houston, USA, May.
  22. Senpere, D. and Auvergne, G.A. (1982), "Suction anchor piles - a proven alternative to driving or drilling", Proceedings of the 14th Annual Offshore Technology Conference, Houston, USA, May.
  23. Skempton, A.W. (1951), "The bearing capacity of clays", Proceedings of the Building Research Congress, London, UK.
  24. Sukumaran, B. and McCarron, W. (1999), "Total and effective stress analysis of suction caissons for Gulf of Mexico conditions", Proceedings of the OTRC '99 Conference, Austin, USA, April. Geotechnical Special Publication No. 88, 247-260.
  25. Tjelta, T.I. (1995), "Geotechnical experience from the installation of the Europipe jacket with bucket foundations", Proceedings of the 27th Annual Offshore Technology Conference, Houston, USA, May.
  26. Tjelta, T.I. (2001), "Suction piles: their position and applications today", Proceedings of the 11th International Offshore Conference, Stavanger, Norway, June.
  27. Watson, P.G., Randolph, M.F. and Bransby, M.F. (2000), "Combined lateral and vertical loading of caisson foundations", Proceedings of the 32nd Annual Offshore Technology Conference, Houston, USA, May.

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