Axial pipe-soil interaction during pipeline-walking analysis of pipelines placed on Bohai sand

Pipeline walking induced by heat-up and cool-down cyclic loadings during shutdown and restart cycles is a challenge in the design of relatively short pipelines exposed on seabeds. A major source of uncertainty in the analysis of pipeline walking is the pipe-soil response, which has a significant influence on pipeline walking. To investigate the pipe-soil response during pipeline walking, a set of large-scale model tests are conducted on Bohai sand, and they involve axially moving pipelines with different speeds and cycles. Based on these test results, bi-linear pipe-soil interaction models with normalization of the pipe weight and diameter are proposed for Bohai Bay sand. Subsequently, a comparison of the model test data to existing pipe-soil interaction models is performed, and the existing pipe-soil interaction models are calibrated with site-specific soil properties of Bohai Bay sand. Finally, the application of the site-specific pipe-soil interaction models for a pipeline-walking analysis of pipeline placed on Bohai Bay sand is performed with the finite element method to study how pipeline walking is influenced by these pipe-soil interaction models. Combined with the influence mechanisms, a design model is proposed that considers the potential risks of pipeline walking in pipeline design to reduce costs without compromising reliability.

• Record URL:
  https://doi.org/10.1016/j.apor.2020.102133
• Record URL:
  http://www.sciencedirect.com/science/article/pii/S0141118719303463
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01411187
• Supplemental Notes:
  • © 2020 Elsevier Ltd. All rights reserved. Abstract reprinted with permission of Elsevier.
• Authors:
  • Liu, Run
  • Li, Chengfeng
  • Peng, Biyao
• Publication Date: 2020-6

Language

• English

Media Info

• Media Type: Web
• Features: Appendices; Figures; References; Tables;
• Serial:
  • Applied Ocean Research
  • Volume: 99
  • Issue Number: 0
  • Publisher: Elsevier
  • ISSN: 0141-1187
  • Serial URL: https://www.sciencedirect.com/journal/applied-ocean-research

Subject/Index Terms

• TRT Terms: Finite element method; Ocean bottom; Repeated loads; Sand; Soil structure interaction; Underwater pipelines
• Geographic Terms: Bohai Bay (China)
• Subject Areas: Geotechnology; Hydraulics and Hydrology; Pipelines;

Filing Info

• Accession Number: 01740803
• Record Type: Publication
• Files: TRIS
• Created Date: May 26 2020 10:43AM