Some Aspects of the Technology Relating to Submarine Pipeline Crossing of Uneven Seabed Areas
The Transmediterranean Pipeline can be considered the most advanced submarine pipeline project that has been undertaken up to the present date.
The project required the use of the most advanced technologies and equipment available at the time, as well as the development of new technologies whose successful application opened up new horizons for submarine pipeline crossings in deep water and across seabeds with an uneven morphology. //1, 2, 3//
At the start of this paper it is intended to refer briefly to the size of the project and, in particular, to the technological developments arising directly from it.
Subsequently, some of the applicational problems which occurred during the construction phase of the project will be discussed.
The problems encountered in the construction of the winding stretches of the pipeline are described. The winding nature of these stretches was directly related to the particularly uneven seabed and, consequently, it was necessary to pass through narrow corridors that were not aligned with the route of the pipeline.
The problems encountered in the phase immediately after pipeline installation are described. It was necessary to decide if, when and how to intervene on the free spans which had inevitably formed as a result of crossing uneven seabeds.
KeywordsEquilibrium Configuration Resonant Oscillation Vortex Shed Submarine Pipeline Narrow Corridor
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- 1.Bruschi, R.M. et al., “Deep Water Pipelines Design: Stress Forecasting and Intervention ‘York Philosophy Before, During and After Laying”, Offshore Technology Conference Paper OTC 4235, 1982.Google Scholar
- 2.Bruschi, R.M. et al., “Vortex Shedding Oscillations for Submarine Pipelines: Comparison Between Full Scale Experiments and Analytical Models”, Offshore Technology Conference Paper OTC 4232, 1982.Google Scholar
- 3.Celant, M. et al., “Fatigue Analysis for Submarine Pipelines”, Offshore Technology Conference Paper OTC 4233, 1982.Google Scholar
- 4.Rivello, R.H., “Theory and Analysis of Flight Structures”, McGraw Hill, 1969.Google Scholar
- 5.Love, A.E.H., “A Treatise on the Mathematical Theory of Elasticity”, Dover, 1944.Google Scholar
- 6.Przemieniecki, J.S., “Theory of Matrix Structural Analysis”, McGraw Hill, 1968.Google Scholar
- 7.Saleeb, A.F. and Chen, !9.F., “Elastic-Plastic Large Displacement Analysis of Pipes”, J. Struct. Div. ASCE, 1981, 107 (ST4), Proc. Paper 16199, pp. 605–626.Google Scholar
- 8.Yang, T.Y., “Matrix Displacement Solution to Elastic Problems of Beams and Frames”, Int. J. Solids Structures, 1973, Pergamon Press, Vol. 9, pp. 829–842.Google Scholar
- 9.Blevins, R.D., “Flow-induced Vibrations”, Van Nostrand Reinhold, 1977.Google Scholar
- 10.Meirovitch, L., “Analytical Methods in Vibrations”, McMillan, 1967.Google Scholar
- 11.Blevins, R.D., “Formulas for natural Frequency and Mode Shape”, Van Nostrand Reinhold, 1979.Google Scholar
- 12.King, R., “A Review of Vortex Shedding Research and its Application”, Ocean Engineering, Pergamon Press, 1977, Vol. 4, pp. 141–171.Google Scholar
- 13.Wootton, L. et al., “Oscillation of Piles in Marine Structures”, C.I.R.I.A. Report 41, London, 1972.Google Scholar
- 14.Hallam, M.G. et al., “Dynamics of Marine Structures”, C.I.R.I.A. Report UR8, London, 1978.Google Scholar
- 15.Griffin, O.M. and Ramberg, S.E., “Some Recent Studies of Vortex Shedding with Application to Marine Tubulars and Risers”, O.M.A. Paper, ASME, New Orleans, 1981.Google Scholar
- 16.Buresti, G. and Lanciotti, A., “Vortex Shedding from Smooth and Roughned Cylinders in Cross-Flow near a Plane Surface”, The Aeronautical Quarterly, Feb, 1979.Google Scholar
- 17.Celant, M., “Fatigue Characterization for Probabilistic Design of Submarine Pipelines”, Corrosion Science, Pergamon Press, Vol. 23, No. 6, pp. 621–636, 1983.Google Scholar