Engineering Measures for Preventing Upheaval Buckling of Buried Submarine Pipelines

LIU Run; WANG  Wu-gang; YAN  Shu-wang; WU Xin-li<

doi:10.3879/j.issn.1000-0887.2012.06.008

Volume 33 Issue 6

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Article Navigation > Applied Mathematics and Mechanics > 2012 > 33(6): 740-753

LIU Run, WANG Wu-gang, YAN Shu-wang, WU Xin-lidoi: 10.3879/j.issn.1000-0887.2012.06.008

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LIU Run, WANG Wu-gang, YAN Shu-wang, WU Xin-li<. Engineering Measures for Preventing Upheaval Buckling of Buried Submarine Pipelines[J]. Applied Mathematics and Mechanics, 2012, 33(6): 740-753. doi: 10.3879/j.issn.1000-0887.2012.06.008

LIU Run, WANG Wu-gang, YAN Shu-wang, WU Xin-lidoi: 10.3879/j.issn.1000-0887.2012.06.008

Citation:

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Engineering Measures for Preventing Upheaval Buckling of Buried Submarine Pipelines

doi: 10.3879/j.issn.1000-0887.2012.06.008

1.
¹State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, P.R.China;²School of Engineering Design, The Pennsylvania State University, University Park, PA 16802, USA

Received Date: 2011-01-18
Rev Recd Date: 2012-03-05
Publish Date: 2012-06-15

Abstract

Abstract

Inservice hydrocarbons must be transported at high temperature and pressure to ease the flow and prevented solidification of the wax fraction. High temperature and pressure induced addition stress in the pipeline, and its accumulation will cause upheaval buckling of the pipeline. If such expansion is resisted, for example by frictional affects of the foundation soil over a kilometer or so of pipeline, compressive axial stress will be set up in the pipe-wall. When the value exceeds the constraint of foundation soil on the pipeline, sudden deformation will occur to release internal stress, which is similar to the sudden deformation of strut due to stability problems. The upheaval buckling may jeopardize the structural integrity of the pipeline. Therefore, the effective engineering measure against this phenomenon plays an important role in submarine pipeline design. In terms of the pipeline installation and protection measures commonly used in Bohai Gulf, three engineering measures was investigated in great details. The analytical method was introduced and developed to consider the protection effect of anti-upheaval buckling of the pipeline. The analyzing results showed that the amplitude of initial imperfection had a great effect on the pipeline thermal upheaval buckling. Both trenching and burial and discrete dumping were effective on preventing the pipeline from buckling. The initial imperfection and operation conditions of the pipelines determined the covered depth and the number of layers of protection measures.
- submarine buried pipeline,
- thermal stress,
- upheaval buckling,
- protection measures

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References(19)

References

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