A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Hydraulic Design of Embedded Culverts
Most new and replacement culverts over a certain size in Kansas must be embedded below the streambed to promote aquatic organism passage. The Kansas Department of Transportation’s (KDOT) Design Manual currently does not address hydraulic analysis and design of embedded culverts. This report provides guidance on hydraulic analysis and design of embedded culverts in general and pipe culverts with KDOT-standard end sections in particular. For embedded pipe culverts under outlet control, the main issues are adjustment of the entrance-loss coefficient for embedment, calculation of the average Manning n value for the embedded cross-section, and calculation of the critical depth at the outlet. For embedded pipe culverts under inlet control, the main issue is adjustment of the headwater depth-discharge relationship to account for embedment effects. The hydraulic relationships for embedded pipe culverts under inlet control in the National Cooperative Highway Research Program (NCHRP) Report 734 (Tullis, 2012), Federal Highway Administration’s (FHWA) Hydraulic Design Series 5 (Schall, Thompson, Zerges, Kilgore, & Morris, 2012), and FHWA’s HY-8 computer program (Versions 7.1 through 7.5) are shown to be incorrect. In this report, the experimental data for embedded pipe culverts under inlet control from NCHRP Project 15-24 are re-analyzed and satisfactory quasi-dimensionless relationships are developed. The final chapter suggests changes to Chapter 14 of KDOT’s Design Manual, Volume I (Part C), to address hydraulic analysis of embedded culverts.
Hydraulic Design of Embedded Culverts
Most new and replacement culverts over a certain size in Kansas must be embedded below the streambed to promote aquatic organism passage. The Kansas Department of Transportation’s (KDOT) Design Manual currently does not address hydraulic analysis and design of embedded culverts. This report provides guidance on hydraulic analysis and design of embedded culverts in general and pipe culverts with KDOT-standard end sections in particular. For embedded pipe culverts under outlet control, the main issues are adjustment of the entrance-loss coefficient for embedment, calculation of the average Manning n value for the embedded cross-section, and calculation of the critical depth at the outlet. For embedded pipe culverts under inlet control, the main issue is adjustment of the headwater depth-discharge relationship to account for embedment effects. The hydraulic relationships for embedded pipe culverts under inlet control in the National Cooperative Highway Research Program (NCHRP) Report 734 (Tullis, 2012), Federal Highway Administration’s (FHWA) Hydraulic Design Series 5 (Schall, Thompson, Zerges, Kilgore, & Morris, 2012), and FHWA’s HY-8 computer program (Versions 7.1 through 7.5) are shown to be incorrect. In this report, the experimental data for embedded pipe culverts under inlet control from NCHRP Project 15-24 are re-analyzed and satisfactory quasi-dimensionless relationships are developed. The final chapter suggests changes to Chapter 14 of KDOT’s Design Manual, Volume I (Part C), to address hydraulic analysis of embedded culverts.
Hydraulic Design of Embedded Culverts
B. M. McEnroe (author) / B. A. Hoffman (author)
2017
51 pages
Report
No indication
English
Hydraulic Design of Embedded Culverts, Technical Summary
| NTIS | 2017
| Engineering Index Backfile | 1963
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Hydraulic Design of Broken-Back Culverts
| ASCE | 2001