Pipe design and durability

Bridge design, construction, maintenance, inspection, and management

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Additional design information

Bridge vs. culvert Choose structure type based on: construction/maintenance cost, risk of failure, risk of property damage, traffic safety, environmental and aesthetics, and construction expedience
Selection of culvert Choose the type of culvert based on roadway profile, channel characteristics, flood damage evaluation, construction/maintenance cost, and service life estimates
Commonly used culvert shapes Circular, pipe-arch, elliptical, box, modified box, arch
Selection of material Choose type of material based on required structure strength, required hydraulic efficiency, installation, availability of material, durability, and cost
Inlets and end treatments Give consideration to projecting culvert barrel, cast-in-place concrete headwalls, pre-cast end sections and mitered culvert ends

Note: The links provided below are to industry organizations. Individual companies and product links are not provided, nor will be in the future.

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NCHRP 474: Service life of culverts: studies corrosion of common types of pipes and their causation and prevention

Most common culverts: concrete pipes, corrugated galvanized steel, thermoplastic pipe, galvanized structural plates
Factors that influence corrosion in metal and concrete pipes: pH, chloride, resistivity, sulfates, abrasion enhances corrosion rate
How to stop corrosion: thicker walls, better materials, coatings, liners
Service life predictions: case studies, internal research results, default estimated service life values (holistically, categorized by local environment conditions)

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Reviews the significance of various physical and chemical factors, which determine the durability, design and performance of concrete pipe

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