Experimental Investigation on Self-Burial of the Pipeline with a Spoiler on Seabed in Steady Current

Gholam Hossein Saghi¹ Majid Vahdani Asadi² Ali Elahi³ Mojtaba Damroudi⁴

1) Managing Director and Chairman of the Board of Directors of Water and Sewerage Company, Bojnourd, North Khorasan, Iran.
2) Water resources development expert of Water and Sewerage Company, Bojnourd,North Khorasan, Iran.
3) Water resources development expert of Water and Sewerage Company, Bojnourd,North Khorasan, Iran.
4) Director of Design Department consulting engineering of haft pargar sayal jam, Bojnourd,Iran,

Publication : 3rd International Congress On Engineering, Technology and Innovation(eticong.com/3rd)
Abstract :
Offshore pipelines are buried in the seabed to be protected from the damage caused by hydrodynamic forces or by human activities. However, because of soil erosion and interaction of currents with the pipeline on the moveable seabed, the processes of local scouring and, sometimes, self-burial of pipelines take place. To increase the rate and extent of scouring, the technique of attaching a spoiler to the pipeline has been developed. through the parameters of the measured instantaneous and time-averaged patterns of the velocity vector field and the streamline topology. In this study, the effect of the spoiler on the process of self-burial is investigated. The results indicated that the attachment of the spoiler to the pipe increases the depths and the length of the self-burial hole. Moreover, on average, increased the self-burial depth of the pipe up to 40% rather than simple pipe.
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