Accession Number : AD0733845

Title :   Twin-Log Floating Breakwater, Small-Boat Basin No. 2, Juneau, Alaska. Hydraulic Model Investigation,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS

Personal Author(s) : Jackson,R. A.

Report Date : MAY 1964

Pagination or Media Count : 30

Abstract : Tests were conducted on 1:6-scale models of twin-log floating breakwaters to determine the feasibility of using this type of structure to protect Small-Boat Basin No. 2, Juneau, Alaska, from wave action. Specifically, it was desired to determine the most economical floating-log breakwater that would reduce a 2-ft wave to about 0.5 ft in the mooring area. Test variables included: (a) log diameters of 3 and 4 ft; (b) center-to-center log spacings of 4.0, 5.7, 8.2 ft; (c) water depths of 10 and 20 ft, which corresponded to low- and high-tide conditions, respectively; (d) wave periods of 1.7, 2.0, 2.5 sec; (e) wave heights of 0.9, 2.0, 2.5, and 2.6 ft; (f) angles of wave attack of 45 and 90 deg; and (g) vertical barrier plates attached to (1) the channelside face of the channelside log, (2) the harborside face of the harborside log, and (3) both channelside face of channelside log and harborside face of harborside log. (Author)

Descriptors :   (*BREAKWATERS, *HYDRAULIC MODELS), WATER WAVES, HARBOR MODELS, CONSTRUCTION MATERIALS, TEST METHODS, ALASKA

Subject Categories : Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE