Abstract

Offshore pipelines are usually buried to protect the pipe from external loads. When trenching is achieved by jetting or ploughing, some clayey soils can be cut into distinct lumps and this lumpy soil is then used as the backfill material under which the pipe is buried. To counter the effects of upheaval buckling, the resistance of the soil to pipe uplift must be known. There is still uncertainty about the performance of lumpy backfill in this regard. A series of centrifuge tests were performed with such soils as backfill, utilising a specially designed pore-pressure measuring pipe, to determine the influence of lump size, lump shape and pullout rate on uplift resistance Backfill comprising larger lumps consolidates quicker than if the backfill lumps are smaller. It is also observed that backfill comprising larger lumps provides greater resistance to pipe uplift after consolidation.


Original document

The different versions of the original document can be found in:

http://dx.doi.org/10.1115/omae2009-79787
https://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1625981,
http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1625981,
https://www.researchgate.net/profile/Andrew_Brennan3/publication/267605384_Consolidation_of_Lumpy_Clay_Backfill_Over_Buried_Pipelines/links/54bceaab0cf29e0cb04c5632.pdf?disableCoverPage=true,
https://discovery.dundee.ac.uk/en/publications/consolidation-of-lumpy-clay-backfill-over-buried-pipelines,
https://academic.microsoft.com/#/detail/2000355883
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Document information

Published on 01/01/2009

Volume 2009, 2009
DOI: 10.1115/omae2009-79787
Licence: CC BY-NC-SA license

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