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  • Presented to: VI ALACPA Airport Pavements Seminar & IV FAA Workshop

    By: David R. Brill, P.E., Ph.D.

    Date: 29 October, 2009

    Federal Aviation AdministrationFlexible Pavement

    Design FAARFIELD 1.3 Workshop

    2Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Starting Screen – No Job Files Created

    Click on “New Job”

    3Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Creating/Naming a Job File

    Enter Job Title

    Click OK

    4Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Copy Basic Section/Pavement Type from Samples

    Click on “Samples”

  • 5Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Copy Basic Section/Pavement Type from Samples

    Default Basic Pavement Sections

    Click on “Copy Section”

    6Federal AviationAdministration Flexible Pavement Design October 29, 2009

    7 Basic Starting Structures in FAARFIELD

    Unbonded PCC on rigidPCConRigid

    PCC Overlay on flexiblePCConFlex

    New rigid on stabilized baseNew Rigid

    New flexible on stabilized baseNewFlexible

    HMA overlay on rigid pavementAConRigid

    HMA overlay on flexible pavementAConFlex

    New flexible on aggregate baseACAggregate

    Pavement TypeSection Name

    Be sure to select the pavement type that most correctly represents your design requirements.

    7Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Copy a Sample Pavement Section Click on desired pavement section.

    Then click on the project where the section will be saved.

    8Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Create a New Job Title

    Enter job title

    Click OK

  • 9Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Create a New Job Title

    Click “End Copy”

    10Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Working With a Pavement Section

    Select the job and then the section you want to analyze.

    Click on “Structure” to open the file.

    11Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Working With a Pavement Section

    The selected sample pavement will appear.

    Click on “Modify Structure” to modify the structure if desired.

    12Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Modifying a Pavement Section

    Click on the box for the layer material type you want to modify.

  • 13Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Modifying a Pavement Section

    Select the layer type you want to include in the pavement section.

    (No modification for this example)

    Click OK

    (Cancel for this example)

    14Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Layer Placement Restrictions

    • There are restrictions on placement of certain pavement layers, e.g.: – Cannot place an overlay below a surface course. – Cannot have two aggregate base layers (P-209 on

    P-209) in the structure. – Aggregate layer cannot be the surface layer.

    • Some layer changes cause changes in the pavement type. – Changing the surface HMA layer to PCC will change

    the pavement type to new rigid.

    15Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Modifying a Pavement Section

    Click on a property in this area to modify it.

    Modify the subgrade CBR for this example.

    16Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Modifying a Pavement Section

    Enter the new value for the material property.

    **Some materials will have limits on allowable values.

    Click OK

  • 17Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Modifying a Pavement Section

    New values appear in the structure window.

    18Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Modifying a Pavement Section

    Change the P-401 HMA Surface layer thickness to 150 mm.

    When done changing properties, click End Modify

    19Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Enter Traffic Mixture

    Click on “Airplane” to enter traffic mix

    20Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Enter Traffic Mixture

    Use “Clear List” to clear the existing airplanes

  • 21Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Enter Traffic Mixture

    For each airplane:

    Click on the desired airplane group.

    Then select the desired airplane from the library and click “Add”

    Repeat for the complete traffic mixture.

    22Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Traffic Mix for This Example

    0.00600220.446B787-8 (Preliminary)11 0.001,000352.441B777-300 ER10 0.00800204.570B767-400 ER9 0.001,200124.058B757-3008 0.00300414.130B747-400 ER Pass.7 0.00400397.801B747-400B Combi6 0.002,00079.243B737-8005 0.00300562.001A380-8004 0.001,000365.200A340-600 std Belly3 0.001,000365.200A340-600 std2 0.0060068.400A320-1001

    Annual Growth, %

    Annual Departures

    Gross Wt., tonnesNameNo.

    23Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Enter Traffic Mixture Certain airplanes may appear in the list twice. This is to address the presence of wing gears and belly gears.

    FAARFIELD treats these as two airplanes.

    However, the weight and departures are interlocked.

    24Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Adjusting Airplane Information Gross Taxi Weight, Annual Departures and % Annual Growth may be modified.

  • 25Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Adjusting Airplane Information - Gross Weight

    Enter the new weight and click OK

    26Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Adjusting Airplane Information - Gross Weight • There are limitations on changes to airplane gross

    weights. • A range is provided for each airplane which

    represents reasonable weights for the airplane: – Default Weight – 40% – Default Weight + 25%

    27Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Adjusting Airplane Information - Annual Departures

    Click on “Annual Departures” to change departures for an airplane.

    28Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Adjusting Airplane Information - Annual Departures

    Enter the annual departures of the airplane and click OK.

  • 29Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Annual Departures in FAARFIELD

    • Annual departures has the same meaning as in the previous design procedure.

    • Arrivals are ignored. • For design purposes, FAARFIELD uses the

    total annual departures, multiplied by the design period in years: – e.g., 1200 annual departures × 20 years = 24,000

    departures.

    30Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Adjusting Airplane Information - % Annual Growth of Annual Departures

    Click on the annual growth value to bring up the dialog box.

    Enter the percent annual growth and click OK.

    31Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Adjusting Airplane Information - % Annual Growth of Annual Departures

    • Allowable range of percent annual growth is +/- 10%.

    • You can create the same effect by modifying the annual departures.

    32Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Viewing Airplane Information

    Scroll over to reveal additional columns of information.

  • 33Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Viewing Airplane Information Available in FAARFIELD Airplane Screen:

    34Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Viewing Airplane Information

    Values in CDF and P/C ratio columns will be zero when airplanes are first entered.

    Save the list when finished entering, then click the Back button.

    35Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Performing the Pavement Design

    The layer with the small arrow is the layer that will be adjusted to provide the structural design.

    The location of the arrow is determined by the type of structure.

    36Federal AviationAdministration Flexible Pavement Design October 29, 2009

    Layers Adjusted During Design

    PCC Overlay on FlexPCConFlex

    PCC Overlay UnbondPCConRigid

    PCC SurfaceNewRigid

    P-209 SubbaseNewFlexible

    P-401 AC OverlayAConRigid

    P-401 AC OverlayAConFlex

    P-154 SubbaseACAggregate

    LAYER ADJUSTEDPAVEMENT TYPE

    For new flexible sections, the arrow can be moved by double-clicking next to the desired base or subbase layer in “modify structure” mode.

  • 37Federal AviationAdministration Flexible Pavement Design Octobe

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