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A Fluid-pipe-soil Approach to Stability Design of Submarine Pipelines

A Fluid-pipe-soil Approach to Stability Design of Submarine Pipelines

This paper presents a new approach for assessing the stability of submarine pipelines, with the purpose of including seabed stability as a key aspect of the design process.

 

The conventional approach to submarine pipeline stability design considers interactions between water and pipeline (fluidpipe) and pipeline and seabed (pipe-soil). The seabed is typically assumed hydrodynamically stable in this approach. Interactions between the water and the seabed (fluid-soil) are generally considered only as an afterthought.
A new approach for assessing the stability of submarine pipelines is under development and is aimed at including seabed stability (or mobility) as a key aspect of the design analysis. An overview of this approach is presented in this paper. A practical method for utilising this design approach has also been developed, and is based on a combination of numerical analysis and physical model testing
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