IMPACT OF SUBGRADE VARIABILITY ON PAVEMENT CONSTRUCTION-MAINTENANCE COST TRADE-OFFS

A philosophy for determining design values for parameters that display stochastic variation is presented. An illustrative example is given that uses the subgrade CBR of a flexible airfield pavement as the stochastic parameter whose design value is desired. The analysis takes into account several plans for pavement maintenance. Based on the trade-off between construction costs and maintenance costs, the optimal maintenance and reconstruction plan and the optimal design CBR are chosen. It becomes clear from the discussion and example that it is just as possible to arrive at an uneconomical design by using too low a design CBR as it is by using too high a value. The only way to determine the proper design CBR is to consider lift-cycle costs and evaluate the construction-maintenance cost trade-offs.

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00080976
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Mar 26 1975 12:00AM