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

Table 6Table 6--1 excerpt1 excerpt

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

Culvert Service Life EstimatorCulvert Service Life Estimator

Culvert Service Life EstimatorCulvert Service Life Estimator

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

Design Standards DetailsDesign Standards Details

Plans Notes for Pipe MaterialsPlans Notes for Pipe Materials

Plans Notes for Pipe MaterialsPlans Notes for Pipe Materials

Plans Notes for Pipe MaterialsPlans Notes for Pipe Materials

Tabulations for Pipe MaterialsTabulations for Pipe Materials

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””

Laser Deflection Testing

Field Testing*Difficult to estimate deflection from video inspection

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