Transcription of SECTION 7 – CULVERTS
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SECTION 7 – CULVERTS
7-1 SECTION 7 CULVERTS Table of Contents SECTION 7 CULVERTS Table of Contents .. 7-1 GENERAL .. 7-2 CULVERT HEADWALLS .. 7-2 General .. 7-2 Conditions at Entrance .. 7-3 Type of Headwall .. 7-3 Debris Fins.. 7-6 CULVERT DISCHARGE VELOCITIES .. 7-6 SELECTION OF CULVERT SIZE AND FLOW CLASSIFICATION .. 7-7 Culvert Hydraulics .. 7-7 Design Procedures .. 7-10 Instructions For Using Nomographs .. 7-12 Example 7-1 .. 7-14 HYDRAULIC CONSIDERATIONS IN BRIDGE DESIGN .. 7-15 General .. 7-15 Types Of Flow For Bridge Design .. 7-16 Modeling Hydraulic Conditions .. 7-17 7-2 Drainage Criteria Manual SECTION 7 - CULVERTS SECTION 7 - CULVERTS GENERAL The function of a drainage culvert is to pass the design storm flow without causing excessive backwater or overtopping of the structure and without creating excessive downstream velocities.
There are three (3) types of outlet control culvert flow conditions: 1. The headwater submerges the culvert opening, and the culvert outlet is submerged by the tailwater. The culvert will flow full (Condition A, Figure 7-3 in Appendix B of this Manual). 2. The headwater submerges the culvert opening, the culvert outlet is not
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