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http://dx.doi.org/10.9765/KSCOE.2015.27.2.135

Comparison of Stability Coefficients of Radial Shape Armor Blocks Depending on Placement Methods  

Min, Eun-Jong (Department of Civil and Environmental Engineering, Seoul National University)
Cheon, Se-Hyeon (Department of Civil and Environmental Engineering, Seoul National University)
Suh, Kyung-Duck (Department of Civil and Environmental Engineering, Seoul National University)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.27, no.2, 2015 , pp. 135-141 More about this Journal
Abstract
In this study, two different uniform placement methods are proposed for each of Tetrapod, Rakuna-IV, and Dimple armoring a rubble mound breakwater, and the corresponding stability coefficients are determined by hydraulic experiments. The Tetrapod and Rakuna-IV show similar stability coefficients regardless of the placement methods, whereas the Dimple shows somewhat different stability coefficients depending on the placement methods. It is shown that the Dimple gives the largest stability coefficient, whereas the Tatrapod gives the smallest value. The uniform placement methods of Tatrapod and Rakuna-IV give slightly larger stability coefficients than the random placement, whereas the uniform placements of Dimple give much larger stability coefficients than the random placement. However, the small void ratio of uniform placements of Dimple requires attention because the blocks would behave like single layer system blocks so that brittle failure could occur.
Keywords
armor units; placement method; rubble mound breakwater; stability coefficient; Dimple; Rakuna-IV; Tetrapod;
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