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Determination of Single Barrel Box Culvert Inlet Loss Coefficients

F. Graziano

Each year, the South Dakota Department of Transportation builds a number of box culverts through its highway construction program. In the past, cast-in-place box culverts were used exclusively, but use of precast box culverts is becoming a viable option. With cast- in-place box culverts, beveled inlet edges and 30 deg. flared wingwalls are used at the inlet because that is usually the most efficient inlet shape. When precast box culverts are used, the inlet ends available from the South Dakota precast industry are mitered end with 0 deg. flared wingwalls which have a standard four inch (regardless of barrel size) beveled edge along the bottom of the top edge of the inlet opening and along the top inside edge of the wingwalls. Current design methods, such as computer program HY8, do not provide for this mitered inlet options because, to our knowledge, model testing has not been conducted for this configuration.

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Determination of Single Barrel Box Culvert Inlet Loss Coefficients

F. Graziano

Each year, the South Dakota Department of Transportation builds a number of box culverts through its highway construction program. In the past, cast-in-place box culverts were used exclusively, but use of precast box culverts is becoming a viable option. With cast- in-place box culverts, beveled inlet edges and 30 deg. flared wingwalls are used at the inlet because that is usually the most efficient inlet shape. When precast box culverts are used, the inlet ends available from the South Dakota precast industry are mitered end with 0 deg. flared wingwalls which have a standard four inch (regardless of barrel size) beveled edge along the bottom of the top edge of the inlet opening and along the top inside edge of the wingwalls. Current design methods, such as computer program HY8, do not provide for this mitered inlet options because, to our knowledge, model testing has not been conducted for this configuration.

Determination of Single Barrel Box Culvert Inlet Loss Coefficients

F. Graziano

Each year, the South Dakota Department of Transportation builds a number of box culverts through its highway construction program. In the past, cast-in-place box culverts were used exclusively, but use of precast box culverts is becoming a viable option. With cast- in-place box culverts, beveled inlet edges and 30 deg. flared wingwalls are used at the inlet because that is usually the most efficient inlet shape. When precast box culverts are used, the inlet ends available from the South Dakota precast industry are mitered end with 0 deg. flared wingwalls which have a standard four inch (regardless of barrel size) beveled edge along the bottom of the top edge of the inlet opening and along the top inside edge of the wingwalls. Current design methods, such as computer program HY8, do not provide for this mitered inlet options because, to our knowledge, model testing has not been conducted for this configuration.

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Title:

Determination of Single Barrel Box Culvert Inlet Loss Coefficients

Contributors:

F. Graziano (author)

Publication date:

1996

Size:

68 pages

Type of media:

Report

Type of material:

No indication

Language:

English

Keywords:

Civil Engineering , Culverts , Intake systems , Hydraulic engineering , Graphs(Charts) , Heat(Fluid mechanics) , Regression analysis , Head losses , Tables(Data) , Highway engineering , Design criteria , South Dakota

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