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Draghead Designs vs. Production

by Nancy L. Case, US Army Corps of Engineers, Dredging, Operations Subsection, Portland, OR, USA,
Cal Woolley, US Army Corps of Engineers, Dredging, Operations Subsection, Portland, OR, USA,
Steve Perkins, US Army Corps of Engineers, Dredging, Operations Subsection, Portland, OR, USA,



Document Type: Proceeding Paper

Part of: Dredging and Dredged Material Disposal

Abstract:

This paper discusses the development and design of draghead configurations for silt materials and describes a testing program designed to determine the most efficient range of the controllable variables that affect dredging production of a hopper dredge in fine grained materials. It includes a description of the test items, procedures, results and a discussion of the draghead designs. The tests evaluated the relative performance of four different draghead configurations under actual dredging conditions in Grays Harbor, Washington, and Pearl Harbor, Hawaii. In addition, the tests were designed to optimize dredging production by evaluating the effects of (a) vessel speed, (b) pump speed, (c) mixing water volume, and (d) draghead angle and pressure on the bottom surface.

Subject Headings: Dredged materials | Ports and harbors | Material tests | Silt | Pumping tests | Pressure vessels | Equipment and machinery | United States | Washington | Hawaii

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