The performance of pipeline ploughs traversing seabed slopes

Mark Bransby (Lead / Corresponding author), David T Barlow, Michael Brown, John Davidson, Stuart Brankin, Scott Robinson

Research output: Contribution to journalArticle

2 Citations (Scopus)
113 Downloads (Pure)

Abstract

Ploughing is a method used to bury pipelines beneath the seabed. In this method, a large purpose built plough is pulled by a support vessel to create a trench into which a pipeline is lowered. The soil that has been removed is then placed or back filled over the pipeline to provide thermal insulation, protective cover and to prevent upheaval buckling (UHB) due to pipeline thermal expansion. The majority of previous research effort has focussed on the behaviour of ploughs on level seabeds and has not investigated common geohazards such as sloping seabeds. There is also limited guidance available to industry on the limitations of ploughing on slopes. This paper reports a series of experimental tests conducted to investigate how ploughs may behave when seabed slopes are encountered and ploughing has to traverse cross-slope. The results show that ploughing operations can still be undertaken when traversing a slope but that the efficiency of operations is reduced with increasing slope inclination, leading to a reduction of trench depth and spoil heap sizes on steeper slopes. This may result in reduced pipeline cover depths on slopes if these effects cannot be mitigated.
Original languageEnglish
Pages (from-to)125-135
Number of pages11
JournalOcean Engineering
Volume148
Early online date20 Nov 2017
DOIs
Publication statusPublished - 15 Jan 2018

Fingerprint

Pipelines
Thermal insulation
Buckling
Thermal expansion
Soils
Industry

Keywords

  • Offshore pipeline ploughing
  • Physical modelling
  • Sand
  • Slopes

Cite this

Bransby, Mark ; Barlow, David T ; Brown, Michael ; Davidson, John ; Brankin, Stuart ; Robinson, Scott. / The performance of pipeline ploughs traversing seabed slopes. In: Ocean Engineering. 2018 ; Vol. 148. pp. 125-135.
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The performance of pipeline ploughs traversing seabed slopes. / Bransby, Mark (Lead / Corresponding author); Barlow, David T; Brown, Michael; Davidson, John; Brankin, Stuart; Robinson, Scott.

In: Ocean Engineering, Vol. 148, 15.01.2018, p. 125-135.

Research output: Contribution to journalArticle

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