Hydraulics of Slope-Tapered Pipe Culverts, HR-398, 2001

(2001) Hydraulics of Slope-Tapered Pipe Culverts, HR-398, 2001. Transportation, Department of


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This report updates the Iowa Department of Transportation (DOT) design procedures for circular, slope-tapered concrete culverts. The current practice is to use the design coefficients for a square-edged, circular concrete culvert with a headwall that are found in Hydraulic Series No. 5 (HDS-5). New inlet control design constants and entrance loss coefficients were calculated for the slope-tapered culverts and then compared with the HDS-5 coefficients (square edge). In addition, various reducer lengths and taper ratios were also studied to determine what impact, if any, they have on the design coefficients. All of the laboratory testing was done at the Federal Highway Administration�s Turner-Fairbank Highway Research Center located in McLean, Virginia.

Item Type: Departmental Report
Keywords: Coefficients, Concrete culverts, Culvert inlets, Design, Hydraulics, Laboratory tests, Pipe culverts
Subjects: Transportation
Transportation > Roads and highways
Transportation > Research
Transportation > Design and Construction
ID Code: 19687
Deposited By: Iowa DOT Library
Deposited On: 02 Jun 2015 15:27
Last Modified: 02 Jun 2015 15:27
URI: https://publications.iowa.gov/id/eprint/19687