Graduate Thesis Or Dissertation
 

A large scale model study of placed stone breakwaters

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/jd473045m

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  • The results of three hydraulic model tests to evaluate the stability of a placed stone breakwater are presented and discussed. The prototype breakwater was designed to protect offshore power and port facilities in 60 feet of water and was tested at scale ratios of 1:10, 1:20, and 1:100. The armor layer tested is formed from quarried stones of irregular parallelepiped shapes, individually placed long axis perpendicular to the plane of the surface. The resultant breakwater is relatively smooth, densely packed and very stable. Stability, runup, rundown, and reflection are evaluated for a variety of water depth, wave height, and periods. Analysis of the damage induced in the models shows that the placed stone armor is approximately as stable as Bolos. Runup, rundown, and reflection response is similar to rough impermeable slopes. Comparison of large and small scale results demonstrate that relative increases in drag forces at lower Reynolds numbers decrease stability and runup in small scale models.
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