Abstract
During 1992 an innovative geotechnical investigation was performed in order to assist the design of the Tordis to Gullfaks ‘C’ flowlines. Data was required for the analysis of upheaval buckling resistance within a back filled trench and to assess the effectiveness of the backfill material as a thermal insulator,
In order to make reliable predictions a comparable trenched section of the previously installed Snorre to Stratfjord pipeline was investigated. Samples of the backfill were taken by means of a boxcorer and laboratory tests were performed on the vessel and onshore. In situ testing for thermal conductivity and shear strength were performed by means of a Heat Flow Probe and an Insitu Shear Vane respectively; both of which were deployed from a Super Scorpio ROV.
The results of the investigation confirmed that the natural trench backfill would provide sufficient upheaval resistance and thermal insulation without resorting to gravel dumping.
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References
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© 1994 Springer Science+Business Media Dordrecht
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Power, P.T., Hawkins, R.A., Christophersen, H.P., McKenzie, I. (1994). Rov Assisted Geotechnical Investigation of Trench Backfill Material Aids Design of the Tordis to Gullfaks Flowlines. In: Aspect ’94. Advances in Underwater Technology, Ocean Science and Offshore Engineering, vol 33. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-1178-2_7
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DOI: https://doi.org/10.1007/978-94-011-1178-2_7
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-4514-8
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