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Applied Mathematics and Mechanics

, Volume 33, Issue 6, pp 781–796 | Cite as

Engineering measures for preventing upheaval buckling of buried submarine pipelines

  • Run Liu (刘 润)Email author
  • Wu-gang Wang (王武刚)
  • Shu-wang Yan (闫澍旺)
  • Xin-li Wu (王新利)
Article

Abstract

In-service hydrocarbons must be transported at high temperature and high pressure to ease the flow and to prevent the solidification of the wax fraction. The high temperature and high pressure will induce the additional stress in the pipeline, which results in the upheaval buckling of the pipeline. If such expansion is resisted, e.g., by the frictional effects of the foundation soil over a kilometer or of a pipeline, the compressive axial stress will be set up in the pipe-wall. When the stress exceeds the constraint of the foundation soil on the pipeline, suddenly-deforming will occur to release the internal stress, similar to the sudden deformation of the strut due to stability problems. The upheaval buckling may jeopardize the structural integrity of the pipeline. Therefore, effective engineering measures against this phenomenon play an important role in the submarine pipeline design. In terms of the pipeline installation and protection measures commonly used in Bohai Gulf, three engineering measures are investigated in great details. An analytical method is introduced and developed to consider the protection effect of the anti-upheaval buckling of the pipeline. The analysis results show that the amplitude of the initial imperfection has a great effect on the pipeline thermal upheaval buckling. Both trenching and burial and discrete dumping are effective techniques in preventing the pipeline from buckling. The initial imperfection and operation conditions of the pipelines determine the covered depth and the number of layers of the protection measures.

Key words

submarine buried pipeline thermal stress upheaval buckling protection measure 

Chinese Library Classification

TE54 

2010 Mathematics Subject Classification

32G05 

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Copyright information

© Shanghai University and Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Run Liu (刘 润)
    • 1
    Email author
  • Wu-gang Wang (王武刚)
    • 1
  • Shu-wang Yan (闫澍旺)
    • 1
  • Xin-li Wu (王新利)
    • 2
  1. 1.State Key Laboratory of Hydraulic Engineering Simulation and SafetyTianjin UniversityTianjinP. R. China
  2. 2.School of Engineering DesignPennsylvania State UniversityUniversity Park, PAUSA

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