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New datasets and improved framework for axial pipe-soil resistance

Published: Offshore Site Investigation and Geotechnics: Integrated Geotechnologies – Present and Future: Proceedings of the 7th International Conference, 12-14 September 2012, London, UK, Society for Underwater Technology, London

12 Sep 2012
Hill, A. (BP), White, D.J. (University Of Western Australia), Bruton, D.A.S. (Crondall Energy), Langford, T. and Meyer, V. (Norwegian Geotechnical Institute), Jewell, R. and Ballard, J-C (Fugro).

The interaction between the seabed and unburied pipelines is one of the key uncertainties associated with deepwater and/or high pressure, high temperature (HPHT) pipeline design. Emerging research is shedding light on this important topic that is not currently well understood. BP has amassed a considerable quantity of data from different basins ranging from conventional in situ measurements of soil properties (supplemented by two campaigns using Fugro’s SMARTPIPE®) to model testing at the Norwegian Geotechnical Institute (NGI) and the University of Western Australia (UWA). Added to this, standard and advanced low stress inter-face shear testing has been carried out in laboratories at the University of Texas, Austin, UWA and Fugro.
These tests were designed to address the key mechanisms governing axial pipe-soil interaction behaviour, spanned a large range of pipe properties and sliding velocities, and included episodes of post-sliding reconso-lidation. New data from all of these sources are given in this paper, along with a theoretical framework devel-oped to synthesise these results and contribute to improved practice for the design of pipelines that are suscep-tible to walking, buckling and other forms of movement.


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