A Parametric Study on Ice Scouring Mechanism for Determination of Pipeline Burial Depths

  • Park, Kyung-Sik (Division of Ocean Development Engineering, Korea Maritime University) ;
  • Lee, Jong-Ho (Division of Ocean Development Engineering, Korea Maritime University)
  • Published : 2004.06.01

Abstract

Interaction of grounded ice ridges with underlying seabed is one of the major considerations in the design of Arctic pipeline system. Previously several ice scour models were developed by researchers to describe the ice scour-seabed interaction mechanism. In this paper, a parametric study on ice scouring mechanism is performed and the limitation of ice scour-seabed interaction models is discussed. Simple laboratory tests are carried out and then the shape pattern of deposited soil around the ice is redefined. New ice scour model assumes trapezoidal cross section based on the field observation data. Ice scour depth and soil resistance forces on seabed are calculated with varying the keel angle of a model ice ridge.

Keywords

References

  1. Chari, T.R. 1979. Some geotechnical aspects of iceberg scours on ocean floors. Canadian Geotechnical Journal, 16, 379-390
  2. Croasdale, K.R. 1977. Ice engineering for offshore petroleum exploration in Canada. Proc. 4th International Conference on Port and Ocean Engineering under Arctic Conditions, St.John's, Canada, 1-32
  3. Gulati, K.C. 1993. Design concepts for sakhalin offshore production platforms. Proc. 12th International Conference on Port and Ocean Engineering under Arctic Conditions, Hamburg, Germany, 2, 487-496
  4. Kioka, S. and H. Saeki. 1995. Mechanisms of ice gouging. Proc. 5th International Offshore and Polar Engineering Conference, The Hague, The Netherlands, 2, 398-402
  5. Kioka, S., Y. Yasunaga, U. Watanabe and H. Saeki. 2000. Evaluation of ice forces acting on seabed due to ice scouring. Proc. 10th International Offshore and Polar Engineering Conference, Seattle, USA, 1, 749-755
  6. Nogueira, A.C. and M. Paulin. 1999. Limit state design for northstar offshore pipeline. Offshore, 59, 9, 146-150
  7. Palmer, A.C., I. Konuk, J. Love, K. Been and G. Comfort. 1989. Ice scour mechanisms. Proc. 10th International Conference on Port and Ocean Engineering under Arctic Conditions, Lulea, Sweden, 1, 123-132
  8. Wright, B., J. Hnatiuk and A. Kovacs. 1981. Multi-year pressure ridges in the canadian beaufort sea. Coastal Engineering, 5, 125-145
  9. Yang, T.S. 1999. Ice Ridge Scour Model for Estimation of Arctic Pipeline Trench Depth. Master thesis, Korea Maritime University
  10. Yoon, KY., K. Choi and H.I. Park. 1997. A numerical simulation to determine ice scour and pipeline burial depth. Proc. 7th nternational Offshore and Polar Engineering Conference, Honolulu, USA, 2, 212-219