TURBULENT BORES–INDUCED SCOUR AND PORE PRESSURE VARIATIONS AROUND A VERTICAL STRUCTURE

Marieh Rajaie; Ioan Nistor; Colin D. Rennie; Amir H. Azimi; Tom Hoffmann

doi:10.9753/icce.v37.sediment.41

No. 37 (2022), Sediment Transport and Morphology

No. 37 (2022)

TURBULENT BORES–INDUCED SCOUR AND PORE PRESSURE VARIATIONS AROUND A VERTICAL STRUCTURE

Sediment Transport and Morphology

Published 2023-09-01

Marieh Rajaie
Ioan Nistor
Colin D. Rennie
Amir H. Azimi
Tom Hoffmann

Marieh Rajaie

Ioan Nistor

Colin D. Rennie

Amir H. Azimi

Tom Hoffmann

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How to Cite

TURBULENT BORES–INDUCED SCOUR AND PORE PRESSURE VARIATIONS AROUND A VERTICAL STRUCTURE. (2023). Coastal Engineering Proceedings, 37, sediment.41. https://doi.org/10.9753/icce.v37.sediment.41

Abstract

The scour due to the highly turbulent tsunami inundation is also a major threat to nearshore infrastructure [Nakamura, et al., 2008]. Research on local sediment erosion during tsunami events has shown a correlation between scour formation, pore pressure variations, and soil liquefaction [Mioduszewski and Maeno, 2003]. To understand the structures’ capacity to withstand the tsunami bores, it is critical to assess scour formation and pore pressure variations around their foundations [Macabuag et al., 2018, Nicholas et al., 2020; Mehrzad et at. 2021]. Young et al. (2008) conducted laboratory experiments to study tsunami induced liquefaction failure on a sand bed with two different slopes of 1V:5H and 1V:15H. The correlation between soil liquefaction and scour showed a direct link with bed slope and pore pressure and the peak pressure increased as the bed slope increased. Concerning the hydrodynamic forcing factor, research conducted by [Chanson, 2006] showed that the hydrodynamic characteristics of tsunami inundation can be adequately modeled using dam-break waves. The prime objective of this study was to comprehensively investigate the interaction of a wide range of hydrodynamic conditions and beach slopes on the variation of the pore pressure and associated scour.

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References

Chock, G., Roberson I., Kriebel D., Francis M., Nistor, I. (2013). Tohoku Japan tsunami of March 11, 2011 – Performance of structures under tsunami loads, ASCE/SEI Report, 359 p

Mehrzad, R., Nistor, I. and Rennie, C., (2022). Scour Mechanics of a Tsunami-Like Bore around a Square Structure. J. of Waterway, Port, Coastal, and Ocean Eng., 148(1), p.04021048.

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TURBULENT BORES–INDUCED SCOUR AND PORE PRESSURE VARIATIONS AROUND A VERTICAL STRUCTURE

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