Automated design-based compaction criteria for airport pavements using FAARFIELD

A new computational procedure developed for the Federal Aviation Administration's (FAA) FAARFIELD program determines the degree of compaction required at various depths, based on the specific pavement thickness design and aircraft traffic mix. This procedure is run at design time and automatically generates a unique schedule of minimum required densities as part of the design report. The basis for computed compaction requirements is the compaction index (CI), which is defined as the CBR required at a given depth for a particular gear load. The procedure implements accepted empirical relationships between CI and degree of compaction that were developed for cohesive and non-cohesive soils from historical full-scale compaction data. Within FAARFIELD, the CI is determined as a function of the layered elastic vertical stress response, making use of the Frohlich's stress concentration factor (to correct for different stress distributions) and the beta factor to relate the computed stress to CBR. The approximate correlation obtained between layered elastic stresses and CI using this methodology is valid throughout the typical design CBR range and can be extended to any complex gear type. The method yields compaction criteria that are reasonable, integrated with the design, and consistent with observed field data.

Language

  • English

Media Info

  • Pagination: pp 797-806
  • Monograph Title: Bearing capacity of roads, railways and airfields: proceedings of the ninth International Conference on the Bearing Capacity of Roads, Railways and Airfields: Trondheim, Norway 25-27 June 2013. Vol 1-2

Subject/Index Terms

Filing Info

  • Accession Number: 01596576
  • Record Type: Publication
  • Source Agency: Swedish National Road and Transport Research Institute (VTI)
  • ISBN: 9788232102853
  • Files: ITRD, VTI
  • Created Date: Apr 21 2016 12:33PM