FDOT Pipe Materials SelectionFDOT Pipe Materials Selection
AASHTO Subcommittee on Construction
David Sadler, P.E.,
FDOT State Construction Engineer
Discussion OutlineDiscussion Outline
Design Service Life PolicyDesign Service Life PolicyOptional Pipe PolicyOptional Pipe PolicyPostPost--Installation Inspection Installation Inspection Agency DecisionAgency Decision--makingmakingInterInter--Industry RelationsIndustry Relations
Design Service LifeDesign Service Life
DSL: Target Life of Pipe InstallationDSL: Target Life of Pipe Installation25 DSL for Side Drains25 DSL for Side Drains50 Year DSL for Low ADT50 Year DSL for Low ADT100100--year DSL for Most Pipesyear DSL for Most Pipes
Value of InstallationValue of InstallationCapital InvestmentCapital InvestmentWhat if this pipe failsWhat if this pipe fails……
MSE Wall with Gutter Drain MSE Wall with Gutter Drain
Gutter Drain
MSE Wall w/ Footer
Fill Slope (typ. 1:2)
Inlet
U-Endwall(w/ Baffles)
From FDOT Drainage Design Manual:From FDOT Drainage Design Manual:
““Optional culvert materials shall be considered for all culvert applications including, but not limited to, storm drains, cross drains, side drains, gutter drains, and French drains. All culvert materials shown in Table 6-1 for the application being designed shall be evaluated. The evaluation shall consider functionally equivalent performance in three areas: durability, structural capacity, hydraulic capacity.”
Optional Pipe PolicyOptional Pipe Policy
FDOT Drainage Design Manual includes FDOT Drainage Design Manual includes information on Optional Pipe for:information on Optional Pipe for:
Culvert Service Life EstimatorCulvert Service Life EstimatorStructural EvaluationStructural EvaluationHydraulic EvaluationHydraulic EvaluationCulvert Materials TypesCulvert Materials TypesDurabilityDurability
Policy Policy -- continuedcontinued
Structural EvaluationsStructural Evaluations
FDOT Design Standards FDOT Design Standards provide structural details provide structural details such as:such as:
Minimum cover over pipeMinimum cover over pipeMaximum coverMaximum coverDimensions of pipesDimensions of pipesSectional propertiesSectional properties
Pipe Materials Used by FDOTPipe Materials Used by FDOT
Rigid PipesRigid PipesRCP, NRCP, FRCPRCP, NRCP, FRCP
Flexible PipesFlexible PipesCMP, CASP, CAP, SRAP, PVC (F949), HDPECMP, CASP, CAP, SRAP, PVC (F949), HDPE
Vertical Drains: Vertical Drains: DIP, CAPDIP, CAP
Bridge Deck Drainage: Bridge Deck Drainage: FRP, PVCFRP, PVC
Cost / Benefit OptimizationCost / Benefit Optimization
For Different Pipe Materials, Negligible Cost For Different Pipe Materials, Negligible Cost Differences Differences On Bid PricesOn Bid PricesFor Permanent Pipe, Use Longest Service Life For Permanent Pipe, Use Longest Service Life That Still Allows Some CompetitionThat Still Allows Some CompetitionFor NonFor Non--permanent Pipe, Use Longest Service permanent Pipe, Use Longest Service Life That Allows All Pipes to CompeteLife That Allows All Pipes to Compete
Quantifying Pipe Service LifeQuantifying Pipe Service Life
Challenge Pipe Material WeaknessesChallenge Pipe Material WeaknessesKnow Technical Failure ModesKnow Technical Failure ModesField Performance Reports from Neutral PartiesField Performance Reports from Neutral PartiesMimic Poor Installation PossibilitiesMimic Poor Installation PossibilitiesInclude Soil CharacteristicsInclude Soil Characteristics
FDOT Culvert Service FDOT Culvert Service Life EstimatorLife Estimator
PostPost--Installation InspectionInstallation Inspection
CCTV Video / Laser RingCCTV Video / Laser RingOpen Joints, Leaking Joints, Open Joints, Leaking Joints, Racking, Deflection,Racking, Deflection,Cracks, ImpingementsCracks, ImpingementsConstruction Construction ““LeftoversLeftovers””
Agency DecisionAgency Decision--MakingMaking
MultiMulti--disciplinary Technical Teamdisciplinary Technical TeamHydraulics, Materials, Structures, ConstructionHydraulics, Materials, Structures, ConstructionContract with Specialty Experts When NeededContract with Specialty Experts When Needed
Pipe soil / structure interactionPipe soil / structure interactionFracture mechanicsFracture mechanicsAntioxidantsAntioxidants
FDOT Pipe Advisory GroupFDOT Pipe Advisory Group
Reviews Pipe Specs, Standards, and Practice in Reviews Pipe Specs, Standards, and Practice in Design and ConstructionDesign and ConstructionAll Pipe Industries and ManufacturersAll Pipe Industries and ManufacturersExclusive Venue for CrossExclusive Venue for Cross--industry Commentsindustry CommentsResponsible, Constructive ConfrontationResponsible, Constructive Confrontation
FDOT Pipe Installation Task TeamFDOT Pipe Installation Task Team
All Pipe Industries and ManufacturersAll Pipe Industries and ManufacturersConstruction Contractor RepresentationConstruction Contractor RepresentationReview various repair techniques of the Review various repair techniques of the different pipe manufacturersdifferent pipe manufacturersIntent is development of a tool for FDOT Intent is development of a tool for FDOT engineers when faced with various defects engineers when faced with various defects on projectson projects