Accession Number : AD0717873

Title :   Stability of Riprap and Discharge Characteristics, Overflow Embankments, Arkansas River, Arkansas: Hydraulic Model Investigation.

Descriptive Note : Technical rept.,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS

Personal Author(s) : Brogdon,N. J. , Jr. ; Grace,J. L.

Report Date : JUN 1964

Pagination or Media Count : 94

Abstract : 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.

Descriptors :   (*DAMS, HYDRAULIC MODELS), (*RIVERS, ARKANSAS), MODEL TESTS, FOUNDATIONS(STRUCTURES), FLUID FLOW, SURFACE ROUGHNESS, DESIGN, PARTICLE SIZE, ROCK, FAILURE(MECHANICS), TABLES(DATA)

Subject Categories : Hydrology, Limnology and Potamology
      Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE