- PII
- 10.31857/S0869780923010046-1
- DOI
- 10.31857/S0869780923010046
- Publication type
- Status
- Published
- Authors
- Volume/ Edition
- Volume / Issue number 1
- Pages
- 34-40
- Abstract
- The effects of sea waves and currents on harbour hydraulic structures are analysed from published open source data and the characteristics of scour from waves, including tsunami waves, are considered. Local bottom scour threatening the general stability of gravity-type engineering structures can arise under the effect of storm waves and currents, jets from ship propulsion devices and tsunami waves near hydraulic engineering structures. The types of scour mechanisms from sea waves have been investigated, i.e., local, general, and overtopping scour. There is a lack of sufficient measurement data for general scour to verify the calculation methods. Generally, general scour does not damage a structure, although it can contribute to its destruction by other types of scour when they overlap. Therefore, existing studies mainly focus on the analysis of local scour. The relationship between local scour and ground liquefaction and their influence on the stability of marine hydraulic structures is established. Failure mechanisms of hydraulic structures due to erosion by tsunami waves are analyzed: leeward and seaward toe scour, crown armour failure, parapet wall failure, sliding failure. The tsunami wave scour enhancement parameter is given, which is the fraction by which the pore pressure gradient reduces the frictional forces resisting scour. Significant ground instability occurs when the scour amplification parameter Λ exceeds a value of 0.5 (Λ ≥ 0.5). The parameter Λ can be used to assess areas where instantaneous liquefaction may be responsible for scour and sediment movement and to further recalculate erosion depths obtained without considering liquefaction. Liquefaction from a tsunami wave may penetrate up to 28% of the maximum erosion depth due to shear forces. The liquefaction phenomenon may occur due to a sudden drop in the water level in the area of return flow concentration. Consequently, the liquefaction phenomenon must be considered in the stability and erosion analysis around the structure.
- Keywords
- <b>:</b><i> волны цунами</i> <i>местный размыв</i> <i>разжижение грунта</i> <i>морские гидротехнические сооружения</i> <i>параметр усиления размыва</i>
- Date of publication
- 19.09.2025
- Year of publication
- 2025
- Number of purchasers
- 0
- Views
- 7
References
- 1. Куприн А.В., Кантаржи И.Г. Влияние разжижения грунта на глубину размыва, вызываемого волнами цунами // Гидротехническое строительство. 2022. № 5. С. 8–12.
- 2. Куприн А.В., Кантаржи И.Г. Типы размывов от волн цунами, воздействующих на гидротехнические сооружения // Гидротехника, 2020. № 4 (61). С. 48–50.
- 3. Iida T., Kure S., Udo K., Mano A., Tanaka H. Scouring mechanism around structure by return flow of tsunami considering liquefaction // Journal of Japan Society of Civil Engineers, Series B2 (Coastal Engineering). 2015. V. 71 (2). P. 241–246. https://doi.org/10.2208/kaigan.71.I_241
- 4. Kato F., Suwa Y., Watanabe K., Hatogai S. Mechanisms of coastal dike failure induced by the reat East Japan Earthquake tsunami // Proc. 33rd Int. Conf. Coastal Engineering, 2012 Santander, Spain. https://doi.org/10.9753/icce.v33.structures.40
- 5. Kuprin A.V., Novakov A.D., Kantarzhi I.G., Gubina N.A. Local and General Scours Caused by Tsunami Waves // Power Technology and Engineering. 2021. V. 54. No 6. P. 836–840. https://doi.org/10.1007/s10749-021-01296-1
- 6. Kuswandi K. Triatmadja R., Istiarto I. Simulation of scouring around a vertical cylinder due to tsunami // Science of Tsunami Hazards. 2017. V. 36 (2). P. 59–69.
- 7. Lim G., Premaratne B., Jayaratne R., Marriott M., Shibayama T. Comparison of Failure Mechanisms of Coastal Structures due to the 2004 Indian Ocean and 2011 Tohoku Tsunami Events // Proc. 6th Int. Conf. on Structural Engineering and Construction Management, 2015.
- 8. Tonkin S., Francis M., Bricker J. Limits on Coastal Scour Depths due to Tsunami // Proc. 6th China-Japan-US Trilateral Symposium on Lifeline Earthquake Engineering. 2013. P. 671–678. https://doi.org/10.1061/9780784413234.086
- 9. Tonkin S., Yeh H., Kato F., Sato S. Tsunami scour around a cylinder: an effective stress approach // Journal of Fluid Mechanics. 2003. V. 496. P. 165–192. https://doi.org/10.1017/S0022112003006402
- 10. Van Der Tempel J., Zaaijer M.B., Subroto H. The effects of scour on the design of offshore wind turbines // Proc. 3rd Int. Conf. on Marine Renewable Energy. 2004. London UK. P. 27–35.
- 11. Yang G., Jianhong Y. Nonlinear standing wave-induced liquefaction in loosely deposited seabed // Bulletin of Engineering Geology and the Environment. 2017. V. 77. P. 1–19. https://doi.org/10.1007/s10064-017-1038-z
- 12. Yeh H. Tsunami Inundation Scour of Roadways, Bridges and Foundations Observations and Technical Guidance from the Great Sumatra Andaman Tsunami // Professional Fellowship Report. 2006.
- 13. Yeh H., Li W. Tsunami Scour and Sedimentation // Proc. 4th Int. Conf. on Scour and Erosion. 2008, Tokyo, JP, P. 95–106.
