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Stability of Riprap and Discharge Characteristics, Overflow Embankments, Arkansas River, Arkansas: Hydraulic Model Investigation
Hydraulic model tests were conducted on overflow embankments similar to those which will be integral parts of navigation dams on the Arkansas River to determine the stability of various gradations of protective stone and the discharge characteristics of such structures. The effectiveness of four gradations of riprap with maximum stone diameters of 16, 24, and 36 in. was investigated on 3- and 10-ft-high, 30- to 35-ft-wide (at crown), access type embankments (i.e. paved roadway on crown), and on 3- and 6.75-ft-high, 20- to 27.5-ft-wide, nonaccess type embankments. The embankment designs were furnished by the U. S. Army Engineer District, Little Rock. The tests were conducted on a 1:4-scale section model which reproduced 90 ft of approach channel, a 40-ft-wide section of the overflow embankment, and 140 ft of exit channel. Fiber glass cloth was used to simulate the gravel or crushed rock filters of the prototype. In addition, a 1:12-scale section model was tested in a 1-ft-wide, glass-sided flume to determine pressures on the crest and downstream slope of the embankment.
Stability of Riprap and Discharge Characteristics, Overflow Embankments, Arkansas River, Arkansas: Hydraulic Model Investigation
Hydraulic model tests were conducted on overflow embankments similar to those which will be integral parts of navigation dams on the Arkansas River to determine the stability of various gradations of protective stone and the discharge characteristics of such structures. The effectiveness of four gradations of riprap with maximum stone diameters of 16, 24, and 36 in. was investigated on 3- and 10-ft-high, 30- to 35-ft-wide (at crown), access type embankments (i.e. paved roadway on crown), and on 3- and 6.75-ft-high, 20- to 27.5-ft-wide, nonaccess type embankments. The embankment designs were furnished by the U. S. Army Engineer District, Little Rock. The tests were conducted on a 1:4-scale section model which reproduced 90 ft of approach channel, a 40-ft-wide section of the overflow embankment, and 140 ft of exit channel. Fiber glass cloth was used to simulate the gravel or crushed rock filters of the prototype. In addition, a 1:12-scale section model was tested in a 1-ft-wide, glass-sided flume to determine pressures on the crest and downstream slope of the embankment.
Stability of Riprap and Discharge Characteristics, Overflow Embankments, Arkansas River, Arkansas: Hydraulic Model Investigation
N. J. Brogdon (author) / J. L. Grace (author)
1964
94 pages
Report
No indication
English
Civil Engineering , Hydrology & Limnology , Dams , Rivers , Hydraulic models , Arkansas , Model tests , Foundations(Structures) , Fluid flow , Surface roughness , Design , Particle size , Rock(Geology) , Failure(Mechanics) , Tables , Riprap , Arkansas River , Embankments , Shore protection , River discharge , Scour