THICKNESS DETERMINATION OF FLEXIBLE HIGHWAY PAVEMENTS FOR MIXED LOADS AND TRAFFIC VOLUME

ONE ACCEPTED METHOD FOR THE THICKNESS DESIGN OF FLEXIBLE PAVEMENTS IS THAT OF THE U.S. CORPS OF ENGINEERS BASED ON EVALUATION OF THE STRENGTH ACCORDING TO THE CBR SCALE. SINCE THIS METHOD OF THE U.S. CROPS OF ENGINEERS IS PARTICULARLY SUITED TO THE CALCULATION OF PAVEMENT THICKNESS FOR RUNWAYS, THERE IS SPECIAL INTEREST IN THE DEVELOPMENT OF A METHOD OF EXTENDING THIS METHOD FOR USE IN DETERMINING THE THICKNESS OF HIGHWAY PAVEMENTS. OBVIOUSLY SUCH AN EXTENSION SHOULD INCLUDE HIGHWAY PAVEMENT THICKNESS CALCULATION FORMULAE EQUIVALENT TO THOSE OF THE U.S. CROPS OF ENGINEERS AS A SPECIAL CASE WHILE ALSO PROVIDING AN APPROPRIATE METHOD OF CALCULATION FOR MIXED TRAFFIC, WHICH IS THE ACTUAL CASE ON THE ROADS. THIS PAPER PRESENTS THE ABOVE MENTIONED EXTENDED FORMULAE AFTER FIRST DEVELOPMENT OF THE SETTLEMENT RELATIONS WHICH ENABLES THE REQUIRED TRANSLATION OF THE U. S. CORPS OF ENGINEERS METHOD TO HIGHWAY PAVEMENTS. THIS TRANSLATION IS DONE BY ASSUMING THAT THE MAXIMUM ALLOWABLE SETTLEMENT IN HIGHWAYS IS 1.5 TIMES THAT OF RUNWAYS DESIGNED BY THE U.S. CROPS OF ENGINEERS. THE FORMULAE DERIVED BY THIS PROCEDURE GIVES VALUES WHICH ARE VERY SIMILAR TO THOSE OBTAINED BY MCLEADS METHOD AND BY FOSTERS METHOD. THE DEVELOPMENT OF THE ABOVE SETTLEMENT PRINCIPLE ENABLES ALSO CALCULATION OF THE PAVEMENT THICKNESS IN SUCH A CASE BY TRANSLATION OF THE MIXED TRAFFIC LOAD AND VOLUME INTO A SINGLE, EQUIVALENT UNIFORM LOAD, THE BASIS OF THE EQUIVALENCE BEING THE MAGNITUDE OF THE SETTLEMENT CAUSED BY EACH TYPE OF LOADING. THE DIFFERENCE BETWEEN THIS SUGGESTED METHOD AND THE EXISTING METHODS OF CALCULATING THICKNESS FOR MIXED LOADS AND TRAFFIC VOLUMES, IS DUE TO THE ABOVE SETTLEMENT PRINCIPLE. /AUTHOR/

• Supplemental Notes:
  • Preprint VoL, PP 16-22, 5 FIG, 1 TAB, 4 REF
• Authors:
  • Livneh, Moshe
  • Shklarsky, E
• Conference:
  • Intl Conf Struct Design Asphalt Pvmts
• Publication Date: 1967-1

Subject/Index Terms

• TRT Terms: California bearing ratio; Flexible pavements; Mixtures; Pavements; Settlement (Structures); Thickness; Traffic; Traffic volume
• Old TRIS Terms: Determination; Highway pavement; Thickness design
• Subject Areas: Highways; Operations and Traffic Management; Pavements;

Filing Info

• Accession Number: 00205478
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 5 1994 12:00AM