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|Title:||Model tests on a triple-bulkhead type of floating breakwater|
|Authors:||United States. Bureau of Yards and Docks|
United States. Army. Office of the Chief of Engineers
Ross, Culbertson W.
|Publisher:||United States, Beach Erosion Board|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||Technical memorandum (United States. Beach Erosion Board) ; no. 99.|
From the Introduction: Some method of temporarily reducing wave action at a shore or beach is occasionally necessary. The sheltered area may be required as a harbor for protection of ships or beach landing craft so that cargo may be transferred to the shore. One method frequently suggested for providing temporary protection is the use of a floating breakwater consisting of several floating bulkheads held together in a vertical position by trusses. The breakwater would be anchored offshore and provide at least partially sheltered water between it and the beach. Some small scale tests were made in 1951 for the Bureau of Yards and Docks of the Department of the Navy (1) which indicated that a breakwater consisting of three bulkheads would be successful in reducing wave action. These tests were on a very small scale and with waves of regular period and height approaching the structure in a normal (perpendicular) direction. At the request of the U. S. Navy, Bureau of Yards and Docks, the Beach Erosion Board has built and tested a floating breakwater of the three-bulkhead type. Measurements have been made of the reduction of wave action, of the forces in the anchor chains required to hold the breakwater in position, and of the stresses in the members holding the bulkheads together. Tests were made with waves approaching from more than one direction and with waves of various heights and periods. The model tested was a 1:24 scale reproduction of a breakwater tentatively designed for ocean use by the Bureau of Yards and Docks. Although the tests were made at this 1:24 linear scale,(2) all dimensions in this report are given in prototype values.
|Appears in Collections:||Technical Memorandum|