Hydraulic Design of Highway Culverts - DOT On-Line Publications

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Chart Concrete Box Culverts (Continued) 11A, 11B Headwater Depth for Inlet Control, Single Barrel Box Culverts, Skewed Headwalls, Chamfered or Beveled Inlet Edges 12A, 11B Headwater Depth for Inlet Control, Rectangular Box Culverts, Flared Wingwalls, Normal and Skewed Inlets 19 mm (12A - 3/4-inch) (12B - 3/4-inch) Chamfer at Top of Opening 13A, 13B Headwater Depth for Inlet Control, Rectangular Box Culverts, Offset Flared Wingwalls and Beveled Edge at Top of Inlet 14A, 14B Critical Depth, Rectangular Section 15A, 15B Head for Concrete Box Culverts Flowing Full, n = 0.012 Corrugated Metal Box Culverts 16A, 16B Inlet Control, Corrugated Metal Box Culverts, Rise/Span < 0.3 17A, 17B Inlet Control, Corrugated Metal Box Culverts, 0.3 ≤ Rise/Span < 0.4 18A, 18B Inlet Control, Corrugated Metal Box Culverts, 0.4 ≤ Rise/Span < 0.5 19A, 19B Inlet Control, Corrugated Metal Box Culverts, Rise/Span ≥ 0.5 20A, 20B Dimensionless Critical Depth Chart, Corrugated Metal Boxes 21A, 21B Head for Corrugated Metal Box Culverts Flowing Full with Concrete Bottom, Rise/Span < 0.3 22A, 22B Head for Corrugated Metal Box Culverts Flowing Full with Concrete Bottom, 0.3 ≤ Rise/Span < 0.4 23A, 23B Head for Corrugated Metal Box Culverts Flowing Full with Concrete Bottom, 0.4 ≤ Rise/Span < 0.5 24A, 24B Head for Corrugated Metal Box Culverts Flowing Full with Concrete Bottom, Rise/Span ≥ 0.5 25A, 25B Head for Corrugated Metal Box Culverts Flowing Full with Corrugated Metal Bottom, Rise/Span < 0.3 26A, 26B Head for Corrugated Metal Box Culverts Flowing Full with Corrugated Bottom, 0.3 ≤ Rise/Span < 0.4 27A, 27B Head for Corrugated Metal Box Culverts Flowing Full with Corrugated Bottom, 0.4 ≤ Rise/Span < 0.5 218
Chart Corrugated Metal Box Culverts (Continued) 28A, 28B Head for Corrugated Metal Box Culverts Flowing Full with Corrugated Bottom, Rise/Span ≥ 0.5 Elliptical Culverts 29A, 29B Headwater for Oval Concrete Pipe Culverts Long Axis Horizontal with Inlet Control 30A, 30B For Oval Concrete Pipe Culverts Long Axis Vertical with Inlet Control 31A, 31B Critical Depth - Oval Concrete Pipe Long Axis Horizontal 32A, 32B Critical Depth - Oval Concrete Pipe Long Axis Vertical 33A, 33B Head for Oval Concrete Pipe Culverts Long Axis Horizontal or Vertical Flowing Full, n = 0.012 Pipe/Arch Culverts 34A, 34B Headwater Depth for C.M. Pipe-Arch Culverts with Inlet Control 35A, 35B Headwater Depth for Inlet Control Structural Plate Pipe-Arch Culverts, 35A - 457 mm (18-inch - 35B) Radius Corner Plate, Projecting or Headwall Inlet, Headwall with or without Edge Bevel 36A, 36B Headwater Depth for Inlet Control Structural Plate Pipe-Arch Culverts, 787 mm (Chart 36A (31-inch - Chart 36B) Radius Corner Plate, Projecting or Headwall Inlet, Headwall with or without Edge Bevel 37A, 37B Critical Depth - Standard Corrugated Metal Pipe-Arch 38A, 38B Critical Depth - Structural Plate Corrugated Metal Pipe-Arch 39A, 39B Head for Standard C.M. Pipe-Arch Culverts Flowing Full, n = 0.024 40A, 40B Head for Structural Plate Corrugated Metal Pipe-Arch Culverts, 457 mm - 40A (18-inch - 40B) Corner Radius Flowing Full, n = 0.0327 - 0.0306 219
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Publication No. FHWA-NHI-01-020 Sep
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Acknowledgements This document’s
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TABLE OF CONTENTS (Cont.) III. CULV
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TABLE OF CONTENTS (Cont.) F. Safety
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LIST OF FIGURES (Cont.) Figure III-
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LIST OF TABLES Table 1. Factors Inf
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ELhf ELhi ELho ELht ELO ELsf ELSO E
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GLOSSARY (Cont.) p Wetted perimeter
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B. Overview of Culverts A culvert i
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Figure I-9--Side-tapered inlet Figu
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. Partly Full (Free Surface) Flow.
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Table 1--Factors Influencing Culver
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D. Economics The hydraulic design o
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For gaged sites, statistical analys
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volume of the remaining runoff hydr
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Figure II-4--Flood hydrograph shape
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Figure II-6--Cross section location
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. Culvert Length. Important dimensi
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HYDROLOGY Peak Flow Check Flows Tab
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Figure III-1--Types of inlet contro
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Figure II-2--Flow contractions for
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The flow transition zone between th
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Figure III-6--Culvert with Inlet Su
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Condition III-7-A represents the cl
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Outlet control flow conditions can
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2 2 Vu Vd HW o + = TW + + HL (6) 2g
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This approximate method works best
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Figure III-12--Weir Crest Length De
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Critical depth is used when the tai
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4. Add the culvert flow and the roa
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NOTE: If the nomographs are put int
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Figure III-19--Critical Depth Chart
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(1) If the Manning’s n value give
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Example Problem #1 (SI Units) A cul
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Example Problem #2 (SI Units) A new
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Example Problem #3 (SI Units) Desig
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Example Problem #4 (SI Units) An ex
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CHART 51A Figure III-21--Inlet Cont
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2. Outlet Control. a. Partly Full F
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Backwater Calculations From hydraul
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English Units INLET CONTROL: AD 0.
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A. Introduction IV. TAPERED INLETS
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height by more than 10 percent (1.1
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A slope-tapered inlet has three pos
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The mitered face slope-tapered inle
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La is the approximate length of the
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E. Design Methods Figure IV-9--Tape
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a. Complete Design Data. Fill in th
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H 1 i. For FALL < D/4, use side-tap
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3. Example Problems a. Example Prob
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. Example Problem #1 (English Units
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103
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105
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c. Example Problem #2 (SI Units). F
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Conclusions: A side-tapered inlet a
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111
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G. Circular Pipe Culverts 1. Design
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Double barrel slope-tapered inlets
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117
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. Example Problem #3 (English Units
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121
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A. The Routing Concept V. STORAGE R
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C. Application to Culvert Design Fi
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Figure V-6--Peak Flow Reduction Bas
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I + I + ( 2s / ∆t − O) = ( 2s /
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Table 5--Inflow Hydrograph, Example
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Figure V-10—Culvert Design Form f
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Figure V-14--Storage vs. Outflow Re
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Table 5 --Inflow Hydrograph, Exampl
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Figure V-18--Culvert Design Form fo
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Figure V-22--Storage vs. Outflow Re
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A. Introduction VI. SPECIAL CONSIDE
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With minor modifications, the culve
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If headwater and flow consideration
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Figure VI-6--Subatmospheric Pressur
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Figure VI-7--Fish Baffles in Culver
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A popular method of providing for f
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passage of the peak flow. Methods f
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Figure VI-15--Sediment Deposition i
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1. Skewed Barrels. The alignment of
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Skewed inlets slightly reduce the h
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arrel for pipes or the flow per met
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Culvert shapes are as important in
Page 187 and 188: • Flood plain ordinances or other
Page 189 and 190: Figure VI-28--Guardrail Adjacent to
Page 191 and 192: Both of the above equations are emp
Page 193 and 194: Tables, charts, and formulas are av
Page 195 and 196: 3. Endwalls and Wingwalls. Culvert
Page 197 and 198: 2. Hydraulic Considerations. Long s
Page 199 and 200: conditions. Variations in the concr
Page 201 and 202: REFERENCES (www.fhwa.dot.gov/bridge
Page 203 and 204: 28. "Design Approaches for Stormwat
Page 205 and 206: 54. "Hydraulic Analysis of Pipe-Arc
Page 207 and 208: ADDITIONAL REFERENCES (In Alphabeti
Page 209 and 210: "Risk Analysis For Hydraulic Design
Page 211 and 212: A. Introduction APPENDIX A DESIGN M
Page 213 and 214: Chart No. 1 Shape and Material Circ
Page 215 and 216: NOTE: The rest of this Appendix A i
Page 217 and 218: Figure A-1--Dimensionless Performan
Page 219 and 220: developed for circular and elliptic
Page 221 and 222: APPENDIX B HYDRAULIC RESISTANCE OF
Page 223 and 224: D. Corrugated Metal Culverts The hy
Page 225 and 226: Curves are shown for 2-2/3 by 1/2 i
Page 227 and 228: F. Spiral Rib Pipe Spiral rib pipe
Page 229 and 230: APPENDIX C CULVERT DESIGN OPTIMIZAT
Page 231 and 232: C. Inlet Control Performance Curves
Page 233 and 234: Figure C-4--Optimization of Perform
Page 235 and 236: E. Tapered Inlet Face Control Perfo
Page 237: APPENDIX D DESIGN CHARTS, TABLES, A
Page 241 and 242: Chart Circular Tapered Inlets 55A,
Page 243 and 244: Table 12--Entrance Loss Coefficient
Page 245 and 246: CHART 1B 225
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