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PRACTICAL AIRPORT PAVEMENT M&R MANAGEMENT

FAA Airport Pavement Working Group Meeting April 24-26, 2012. PRACTICAL AIRPORT PAVEMENT M&R MANAGEMENT. Y. Hachiya & M. Kanno Service Center of Port Engineering Tokyo, JAPAN. 1. Contents. Performance of Airport Pavements Structure Safety Surface Course Durability APMS ( M&R ) in Japan

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PRACTICAL AIRPORT PAVEMENT M&R MANAGEMENT

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  1. FAA Airport Pavement Working Group Meeting April 24-26, 2012 PRACTICAL AIRPORT PAVEMENT M&RMANAGEMENT Y. Hachiya & M. Kanno Service Center of Port Engineering Tokyo, JAPAN 1

  2. Contents • PerformanceofAirportPavements • Structure • Safety • Surface Course Durability • APMS(M&R)inJapan • Inspection&Maintenance • Evaluation • Rehabilitation

  3. AirportsinJapan

  4. PERFORMANCE OF AIRPORT PAVEMENTS

  5. RequiredPerformance • Structure • Subgrade&Bases(BearingCapacity&Frost),HMA-Fatigue&Rutting • Safety • Rutting,SurfaceFriction • SurfaceCourseDurability • Aging,Raveling,DebondingbetweenLayers

  6. Structure • Performance-Based Design - Verification • ex: Fatigue Cracking in HMA • FDd : Design Value of Fatigue Damage • FDdl : Limit Value of FDd • gi: Importance Factor HMA Bases Strain onHMA Bottom Subgrade

  7. Safety • Surface Friction • Coefficients of friction are periodicallyinspected • Grooving is generally required • Surface Configuration • Follows the ICAO Recommendations by Surface Friction Tester

  8. Surface Course Durability • Debonding between Layers • Materialsarespecified as follows; • Increase Aggregate Size • Use Polymer-Modified Asphalt • Secure Air Void 3%ormore • Increase Single Lift Thickness to 80mm • Use Warm Mix Asphalt if necessary

  9. AirportPavementM&RManagementsystem in Japan

  10. Airport Pavement M&RManagement

  11. INSPECTION AND MAINTENANCE PHASEPavement Inspection • Patrol • Visually, on foot or slow-moving vehicle • Emergent • Visually, after earthquake • Detailed • When necessary, surface distress by measuring vehicle & structure by FWD, etc. • Periodic • Surface distress and configuration

  12. New Inspection Patrol System • Mobile PC & Differential GPS • Process • Identification • Evaluation and treatment • Description and photographing • Reporting

  13. SOUNDNESS EVALUATION PHASESurfaceDistress • PRI (Pavement Rehabilitation Index) • PRI = 10 - 0.450CR - 0.0511RD - 0.655SV • CR: Crack Ratio, RD: RutDepth, SV: Roughness • The need for rehabilitation works • A: unnecessaryB: in the near future(sub-classifiedinto3cat.)C: immediately

  14. SOUNDNESS EVALUATION PHASEStructural Evaluation with FWD

  15. Overlay Design • Existing Pavement Evaluation • Experienced traffic volume, components & properties of existing pavement • Design Conditions • Design period, loading conditions, climate, fatigue properties of new HMA • Fatigue Analysis • Strains of HMA, aircraft wandering • Overlay Thickness Design

  16. Design Example • Fatigue Damage (FD) of Existing HMA Bottom Layer • Accumulated till the Present: 0.8 • Added after Overlay: 0.204 – 0.142 • Summed: 1.004 - 0.942 • Overlay Thickness: 80mm

  17. REHABILITATION OPTIMIZATION PHASERehab Work Scheduling • AirPORTS (Airport Pavement Optimal Rehabilitation Timing System) Database Annual change of PRI Recovery of PRI due to rehabilitation works Cost of rehabilitation work Optimal Rehabilitation Procedure Selection Acceptable PRI Rehabilitation Cost Prediction Annual rehabilitation cost for service duration Rehabilitation Budget Allocation Annual rehabilitation budget smoothing

  18. Annual Change & Recovery of PRI

  19. Optimal Rehabilitation Schedule

  20. Currently Conducting Studies • Refining AirPORTS • Osaka & Nagasaki Airports were surveyed • Extending to Nationwide • Simplified Rehab Needs Judgment • Utilizing Monthly Inspection Data • Applying to Local Airports • Practical Performance Based Design • Developing Issues on Rutting, etc.

  21. Thank you for your attention. http://www.scopenet.or.jp/main/eng/index.html

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