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Title: Hydrodynamic forces on tainter gates and stilling basin : Old River Control Auxiliary Structure; hydraulic model investigation
Authors: United States. Army. Corps of Engineers. New Orleans District.
Fletcher, Bobby P.
Grace, John L.
Keywords: Debris
Drag forces
Electronic pressure cells
Hoist cables
Hydrodynamic loads
Stilling basin
Stilling basin apron
Tainter gate
Hydraulic structures
Old River Control Auxiliary Structure
Publisher: Hydraulics Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical report (U.S. Army Engineer Waterways Experiment Station) ; HL-88-1.
Description: Technical Report
Abstract: Tests were conducted using a 1:50-scale section model to determine the magnitude and frequency of the hydrodynamic loads acting on the tainter gate trunnions and hoist cables, and the stilling basin apron monoliths, baffles, and end sill. Force measurements at the gate trunnions indicated that the trunnions were subjected to static loadings in an upward and downstream direction. Gate hoist cable loads were occasionally periodic and always in a downward direction. The location, frequency, and magnitude of the resultant forces acting on the stilling basin apron were determined. Also tests were conducted to determine the forces acting on the baffles and end still. The measured drag forces on the baffle blocks were significantly higher than drag forces computed from drag coefficients. This indicated the need for research or site-specific studies to develop design guidance for determining the individual and collective forces acting on stilling basins. Piezometers and electronic pressure cells were used to measure pressure distribution in the stilling basin. Water-surface profiles were obtained along the longitudinal center line of the stilling basin. A skin plate covering the girders on the downstream side of the tainter gate prevented debris from accumulating on the gate. The skin plate did not alter the hydraulic loads on the tainter gate.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Report

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