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3-D Numerical Model for Wave-Induced Seabed Response around an Offshore Pipeline
Abstract:Seabed instability around an offshore pipeline is one of key factors that need to be considered in the design of offshore infrastructures. Unlike previous investigations, a three-dimensional numerical model for the wave-induced soil response around an offshore pipeline is proposed in this paper. The numerical model was first validated with 2-D experimental data available in the literature. Then, a parametric study will be carried out to examine the effects of wave, seabed characteristics and confirmation of pipeline. Numerical examples demonstrate significant influence of wave obliquity on the wave-induced pore pressures and the resultant seabed liquefaction around the pipeline, which cannot be observed in 2-D numerical simulation.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1316748Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 427
 A. C. Palmer and R. A. King, Subsea pipeline engineering. PennWell Books, 2004.
 B. M. Sumer, F. H. Dixen, and J. Fredsøe, “Cover stones on liquefiable soil bed under waves,” Coastal Engineering, vol. 57, no. 9, pp. 864–873, 2010.
 J. Fredsøe, “Pipeline–seabed interaction,” Journal of Waterway, Port, Coastal, and Ocean Engineering, vol. 142, no. 6, p. 03116002, 2016.
 B. M. Sumer, Liquefaction around marine structures. World Scientific, 2014.
 K. Zen and H. Yamazaki, “Field observation and analysis of wave-induced liquefaction in seabed,” Soils and Foundations, vol. 31, no. 4, pp. 161–179, 1991.
 H. B. Seed and M. S. Rahman, “Wave-induced pore pressure in relation to ocean floor stability of cohesionless soils,” Marine Geotechnology, vol. 3, no. 2, pp. 123–150, 1978.
 T. Yamamoto, “Wave-induced pore pressures and effective stresses in inhomogeneous seabed foundations,” Ocean Engineering, vol. 8, pp. 1–16, 1981.
 O. S. Madsen, “Wave-induced pore pressures and effective stresses in a porous bed,” G´eotechnique, vol. 28, no. 4, pp. 377–393, 1978.
 B. M. Sumer, J. Fredsøe, S. Christensen, and M. L. Lind, “Sinking/floatation of pipelines and other objects in liquefied soil under waves,” Coastal Engineering, vol. 38, pp. 53–90, 1999.
 B. M. Sumer, C. Truelsen, T. Sichmann, and J. Fredsøe, “Onset of scour below pipelines and self-burial,” Coastal engineering, vol. 42, no. 4, pp. 313–335, 2001.
 T. C. Teh, A. C. Palmer, and J. S. Damgaard, “Experimental study of marine pipelines on unstable and liquefied seabed,” Coastal Engineering, vol. 50, pp. 1–17, 2003.
 C. Zhou, G. Li, P. Dong, J. Shi, and J. Xu, “An experimental study of seabed responses around a marine pipeline under wave and current conditions,” Ocean Engineering, vol. 38, no. 1, pp. 226–234, 2011.
 D. Jeng and Y. Lin, “Wave–induced pore pressure around a buried pipeline in gibson soil: finite element analysis,” International Journal for Numerical and Analytical Methods in Geomechanics, vol. 23, no. 13, pp. 1559–1578, 1999.
 D.-S. Jeng and L. Cheng, “Wave-induced seabed instability around a buried pipeline in a poro-elastic seabed,” Ocean Engineering, vol. 27, no. 2, pp. 127–146, 2000.
 A. H. D. Cheng and P. L.-F. Liu, “Seepage force on a pipeline buried in a poroelastic seabed under wave loading,” Applied Ocean Research, vol. 8, no. 1, pp. 22–32, 1986.
 F. Gao, D. S. Jeng, and H. Sekiguchi, “Numerical study on the interaction between non-linear wave, buried pipeline and non-homogenous porous seabed,” Computers and Geotechnics, vol. 30, no. 6, pp. 535–547, 2003.
 F.-P. Gao and Y.-X. Wu, “Non-linear wave induced transient response of soil around a trenched pipeline,” Ocean Engineering, vol. 33, pp. 311–330, 2006.
 X.-L. Zhou, D.-S. Jeng, Y.-G. Yan, and J.-H. Wang, “Wave-induced multi-layered seabed response around a buried pipeline,” Ocean Engineering, vol. 72, pp. 195–208, 2013.
 Z. Lin, Y. Guo, D.-s. Jeng, C. Liao, and N. Rey, “An integrated numerical model for wave–soil–pipeline interactions,” Coastal Engineering, vol. 108, pp. 25–35, 2016.
 H.-Y. Zhao, D.-S. Jeng, Z. Guo, and J.-S. Zhang, “Two dimensional model for pore pressure accumulations in the vicinity of a buried pipeline.” Journal of Offshore Mechanics and Arctic Engineering, ASME, vol. 136(4), p. 042001, 2014.
 P. Higuera, J. Lara, and I. Losada, “Realistic wave generation and active wave absorption for vavier-stokes models: Application to openfoam,” Coastal Engineeirng, vol. 71, pp. 102–118, 2013.
 F. Engelund, On the laminar and turbulent flows of ground water through homogeneous sand. Akad. for de Tekniske Videnskaber, 1953.
 H. Burcharth and O. Andersen, “On the one-dimensional steady and unsteady porous flow equations,” Coastal engineering, vol. 24, no. 3-4, pp. 233–257, 1995.
 M. A. Biot, “General theory of three-dimensional consolidation,” Journal of Applied Physics, vol. 26, no. 2, pp. 155–164, 1941.
 J. Ye and D.-S. Jeng, “Response of seabed to natural loading-waves and currents,” Journal of Engineering Mechanics, ASCE, vol. 138, no. 6, pp. 601–613, 2012.
 J. R. C. Hsu and D.-S. Jeng, “Wave-induced soil response in an unsaturated anisotropic seabed of finite thickness,” International Journal for Numerical and Analytical Methods in Geomechanics, vol. 18, no. 11, pp. 785–807, 1994.
 D. Jeng and J. Hsu, “Wave-induced soil response in a nearly saturated sea-bed of finite thickness,” Geotechnique, vol. 46, no. 3, pp. 427–440, 1996.
 D.-S. Jeng, Porous Models for Wave-seabed Interactions. Springer, 2012.
 B. Liu, D.-S. Jeng, G. Ye, and B. Yang, “Laboratory study for pore pressures in sandy deposit under wave loading,” Ocean Engineering, vol. 106, pp. 207–219, 2015.
 M. Umeyama, “Coupled piv and ptv measurements of particle velocities and trajectories for surface waves following a stedy current,” Journal of Waterway, Port, Coastal and Ocean Engineering , ASCE, vol. 137, pp. 85–94, 2011.
 M. Mattioli, J. M. Alsina, A. Mancinelli, M. Miozzi, and M. Brocchini, “Experimental investigation of the nearbed dynamics around a submarine pipeline laying on different types of seabed: the interaction between turbulent structures and particles,” Advances in water resources, vol. 48, pp. 31–46, 2012.