Abstract

The nonlinear behavior at the pipe soil contact interface at Touchdown Zone (TDZ) is critical for global and local Steel Catenary Riser (SCR) deformations, especially the predicted fatigue life. In this paper, soft cohesive soil was chosen as the medium in view of the deepwater geotechnical conditions and a series of model tests were carried out to research the vertical pipe soil interaction. The soil resistances under different pipe model vertical movement velocity were recorded during the tests, so as to research the effect of pipe movement velocity to the pipe soil interaction. And the simulation results obtained by Coupled Eulerian Lagrangian (CEL) method were compared to model test data. An empirical formula to calculation the soil resistance during vertical pipe soil interaction is established by nonlinear fitting based on numerical simulation results.

Keywords:
penetration depth, technology conference, undrained shear strength, empirical formula, simulation result, test result, modeling & simulation, cohesive soil, model pipe, test tank
Subjects:
Pipelines, Flowlines and Risers, Risers
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2014. International Society of Offshore and Polar Engineers
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