Taxiway P at Philadelphia International Airport (PHL) is a parallel taxiway to Runway 9L-27R; however, it does not meet Federal Aviation Administration (FAA) separation criteria for Group V aircraft in low-visibility conditions. Therefore, the taxiway was realigned to meet the separation criteria, resulting in the taxiway footprint being located on normally consolidated, very soft clay soils. To address intolerable settlement, site improvement was a key aspect of the project design and included surcharging to accelerate consolidation as well as two first-of-their-kind uses at PHL: Low-Density Cellular Concrete (LDCC) and Cement-Treated Subgrade (CTS). This case study evaluates the site improvement and pavement design processes and assumptions against as-constructed conditions via a settlement plate monitoring program, quality control and quality assurance materials testing, and Heavy-Weight Deflectometer (HWD) testing. The results are intended to further the state of the engineering practice for airfield pavement projects constructed over soft ground susceptible to consolidation settlement.


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    Title :

    Design and Construction of Taxiway Realignment over Soft Soils at Philadelphia International Airport


    Contributors:

    Conference:

    International Airfield and Highway Pavements Conference 2025 ; 2025 ; Glendale, Arizona



    Publication date :

    2025-06-05




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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