APPLICATION OF TRIAXIAL COMPRESSION TEST RESULTS TO THE CALCULATION OF FLEXIBLE PAVEMENT THICKNESS

WHILE SERVICE RECORDS AND FIELD OBSERVATIONS ARE RECOGNIZED AS ESSENTIAL TO THE DESIGN OF BASES AND SURFACES, THEORETICAL RELATIONS BETWEEN PAVEMENT PERFORMANCE AND SOIL CHARACTERISTICS ARE PRESENTED AS AN AID TO INTERPRETING AND EVALUATING FIELD DATA. THE STRESSES AND DISPLACEMENTS RESULTING FROM A UNIFORM VERTICAL PRESSURE OVER A CIRCULAR AREA ARE TABULATED. ALSO DISCUSSED ARE THE VARIATIONS CAUSED BY TIME- CONSOLIDATION, CONTACT SHEAR STRESS, ELLIPTICAL CONTACT AREA, RIGIDITY OF BEARING AREA, AND STRENGTH OF SUPPORTING MATERIAL. STRESS-STRAIN AND STRENGTH CHARACTERISTICS OF PAVEMENT AND FOUNDATION MATERIALS ARE DETERMINED FROM TRIAXIAL TEST RESULTS AND APPLIED TO THE CALCULATION OF PAVEMENT THICKNESS BY THREE METHODS: (1) DISPLACEMENT, WHICH REQUIRES EMPIRICAL DETERMINATION OF ALLOWABLE DISPLACEMENT; (2) OVERSTRESS OF A POINT, APPLICABLE TO COHESIVE MATERIALS; (3) BEARING CAPACITY, APPLICABLE TO BOTH COHESIVE AND COHESIONLESS MATERIALS. THE VARIATION OF PAVEMENT THICKNESS WITH LOAD AND MOISTURE CONTENT OF A COHESIVE SUBGRADE IS ILLUSTRATED. IT IS SUGGESTED THAT THE EFFECT OF THE PAVEMENT ON THE STRENGTH OF THE SUBGRADE MAY BE AS IMPORTANT AS ITS AFFECT ON THE STRESS DISTRIBUTION. STRESSES TRANSMITTED FROM A UNIFORM TANGENTIAL STRESS OVER A CIRCULAR AREA SUCH AS CAUSED BY VEHICLE DECELERATION ARE EVALUATED. A RELATION BETWEEN SUCH LOADING AND SURFACE THICKNESS IS PRESENTED. /AUTHOR/

  • Supplemental Notes:
    • Vol 26, pp 26-39, 13 FIG, 5 TAB, 18 REF
  • Authors:
    • Barber, E S
  • Publication Date: 1947

Media Info

  • Monograph Title: Proceedings of the Twenty-Sixth Annual Meeting of the Highway Research Board Held at Washington, D.C. December 5-8, 1946
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00205902
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: May 29 1972 12:00AM