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Volume 20, Issue 43 (6-2024)                   Marine Engineering 2024, 20(43): 70-79 | Back to browse issues page

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Bagheshahi A, Shafieefar M, Motalebizadeh M R. Experimental Evaluation of the deep toe stability of rubble mound breakwater with Accropod concrete armor. Marine Engineering 2024; 20 (43) :70-79
URL: http://marine-eng.ir/article-1-1103-en.html
Experimental Evaluation of the deep toe stability of rubble mound breakwater with Accropod concrete armor
Abbas Bagheshahi1 , Mehdi Shafieefar *2 , Mohammas Reza Motalebizadeh3
1- Faculty of Civil and Environmental EngineeringTarbiat Modares University
2- Faculty of Civil and Environmental Engineeringtarbiat Modares University
3- Department of Civil Engineering, Yazd Branch, Islamic Azad University, Yazd, Iran
Abstract:   (501 Views)
The Toe is a structure with the function of supporting the armor layer and preventing scouring of the substrate. Due to the location of the toe under water, the safe design of this layer is important. Experiments have been conducted in order to investigate the parameters of wave period, water depth, nominal stone diameter, toe width and berm height. Based on the results of the experiments, the wave period has a great effect on the stability of the Toe. In the next step, the depth of the water above the Toe is important in the amount of damage caused to the Toe. By increasing the nominal diameter of the Toe stone, no significant reduction in the amount of damage was observed. Decreasing the front slope of the toe from 1:1.5 to 1:3 was a solution to achieve stability. By reducing the front slope, the overall width of the berm increases; Therefore, it was decided to implement the Toe with a front slope of 1:1.5 and the width of the berm to be two nominal diameters. In this case, due to the collision of waves; The front slope of the toe is changed and becomes stable.
Keywords: Rubble mound, Breakwater, Toe Stability, Wave Period
Full-Text [PDF 1938 kb]   (192 Downloads)    
Type of Study: Research Paper | Subject: Marine Structures and near shore
Received: 2024/03/6 | Accepted: 2024/09/24
References
1. J. W. Eckert, "Design of toe protection for coastal structures," in Coastal Structures' 83, ASCE, 1983, pp. 331-341.
2. U. S. A. E. W. E. S. C. E. R. Center, SHORE PROTECTION MANUAL. US Government Printing Office, 1984.
3. E. Gerding, "Toe structure stability of rubble mound breakwaters." Delft Hydraulics, 1993.
4. L. D. Van Leeuwen, "Toe stability of rubble-mound breakwaters," Delft Univ. Technol., 1996.
5. M. VAN DER, "Geometrical design of coastal structures," Infram (www. infram. nl), Marknesse, also Publ. as, 1998.
6. USACE (2006), "Coastal Engineering Manual (CEM): Part VI Design of coastal project elements," U.S. Army Corps Eng. (chl.erdc.usace.army.mil), Hughes, S.A. CHL, Vicksbg., 2006.
7. S. A. Baart, "Toe structure for rubble mound breakwaters: Analysis of toe bund design tools and a method for toe rock stability description," 2008.
8. R. E. Ebbens, S. H. Engineering, and D. M. Consultants, "Toe structures of rubble mound breakwaters Stability in depth limited conditions Stability in depth limited conditions," no. February, 2009.
9. M. R. A. Van Gent and I. M. Van Der Werf, "Toe stability of rubble mound breakwaters," in Proceedings of the 34th International Conference on Coastal Engineering; ASCE: Seoul, Korea, 2014. [DOI:10.9753/icce.v34.structures.22]
10. M. P. Herrera and J. R. Medina, "Toe berm design for very shallow waters on steep sea bottoms," Coastal Engineering, vol. 103. pp. 67-77, 2015. doi: 10.1016/j.coastaleng.2015.06.005. [DOI:10.1016/j.coastaleng.2015.06.005]
11. M. P. Herrera, J. Molines, and J. R. Medina, "Hydraulic stability of nominal and sacrificial toe berms for mound breakwaters on steep sea bottoms," Coastal Engineering, vol. 114. pp. 361-368, 2016. doi: 10.1016/j.coastaleng.2016.05.006. [DOI:10.1016/j.coastaleng.2016.05.006]
12. A. Etemad-Shahidi, M. Bali, and M. R. A. van Gent, "On the toe stability of rubble mound structures," Coast. Eng., vol. 164, p. 103835, 2021, doi: 10.1016/j.coastaleng.2020.103835. [DOI:10.1016/j.coastaleng.2020.103835]
13. M. Shafieefar, M. R. Shekari, "An experimental study on the parameterization of reshaped seaward profile of berm breakwaters", Coast. Eng., vol.91, p.123-139, 2020 [DOI:10.1016/j.coastaleng.2014.05.009]
14. M. Shafieefar, M. R. Shekari, and B. Hofland, "Influence of toe berm geometry on stability of reshaping berm breakwaters," Coast. Eng., vol. 157, p. 103636, 2020, doi: 10.1016/j.coastaleng.2020.103636. [DOI:10.1016/j.coastaleng.2020.103636]
15. S. A. Hughes, Physical models and laboratory techniques in coastal engineering, vol. 7. World Scientific, 1993. [DOI:10.1142/9789812795939]
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