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Impact Drag Forces on Pipelines Caused by Submarine Glide Blocks or Out-Runner Blocks

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Submarine Mass Movements and Their Consequences

Part of the book series: Advances in Natural and Technological Hazards Research ((NTHR,volume 31))

Abstract

This paper discusses the forces resulting from the impact of an intact submarine landslide (the glide block or out-runner block region) on a suspended submarine pipeline. Eight physical experiments were conducted using the geotechnical centrifuge facility at C-CORE. In prototype scale, clay chunks equivalent to 12 m × 6 m × 4.5 m (l × w × h) were used to model the glide blocks or out-runner blocks. They had s u ranging from 4 to 7 kPa, and impact velocities ranging from 0.1 to 1.3 m/s. The clay blocks impacted the suspended pipes at a direction normal to the pipe axis. The diameters of the pipes were 0.19 and 0.29 m. Based on these experimental results, a method to estimate the impact drag force on a pipeline caused by a submarine glide block or out-runner block was developed.

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Acknowledgments

The presented work was supported by C-CORE which is greatly acknowledged. We express our sincere gratitude to Bradley Elliott, Gerry Piercey, Derry Nicholl, Don Cameron and Karl Tuff of the C-CORE Geotechnical Group for their significant efforts, help and contribution to this research program. We greatly appreciate the efforts of Dr. Peter Gauer, whose comments have improved this paper and the help in the past with the previous works and Dr. Andy Take for his comments as well.

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Correspondence to Arash Zakeri .

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Chi, K., Zakeri, A., Hawlader, B. (2012). Impact Drag Forces on Pipelines Caused by Submarine Glide Blocks or Out-Runner Blocks. In: Yamada, Y., et al. Submarine Mass Movements and Their Consequences. Advances in Natural and Technological Hazards Research, vol 31. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-2162-3_38

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