INTERPRETATION OF SOIL TEST DATA ON AN AREAL BASIS

THE USE OF GEOLOGY IN THE PLANNING OF NEW ROADS IS DISCUSSED. THE INTERPRETATION OF SOIL TEST DATA ON AN AREAL BASIS AND USE OF THESE DATA FOR DESIGN OF ROADS AND PAVEMENTS IS EMPHASIZED. RESULTS OF A STUDY OF SOIL VARIANCE AS IT PERTAINS TO THE DESIGN OF FLEXIBLE TYPE PAVEMENTS SUGGEST THAT IT IS A FUNCTION OF THE PROPERTY BEING MEASURED AND THAT INSOFAR AS DESIGN OF PAVEMENTS IS CONCERNED, ITS SIGNIFICANCE IS DEPENDENT ON TRAFFIC AND ENVIRONMENTAL CONDITIONS AT THE SITE. A METHOD FOR SELECTING A DESIGN VALUE FROM AN ARRAY OF SOIL DATA OBTAINED FROM A GIVEN MATERIAL TYPE IS PRESENTED. THE ANALYSIS REVEALS THAT THE OPTIMUM DESIGN VALUE IS GENERALLY, BUT NOT ALWAYS, LESS THAN THE MEAN TEST VALUE FOR THE AREA AND THAT IT IS DEPENDENT ON TRAFFIC, ENVIRONMENTAL CONDITIONS AND SOIL VARIABILITY. SOIL VARIABILITY AND FACTORS INFLUENCING IT ARE REVIEWED AND THE PREDICTION OF TEST VALUES FROM SOIL SURVEYS IS DISCUSSED. DESIGN STRENGTH VALUES AND MAINTENANCE COST ANALYSIS ARE CONSIDERED. FIGURES ILLUSTRATE TYPICAL DISTRIBUTION OF REQUIRED THICKNESS OF FLEXIBLE PAVEMENT AS A FUNCTION OF PERCENTILE ROADWAY, AND ACTUAL TEST DATA FOR A SPECIFIC ROAD TOGETHER WITH THE REQUIRED THICKNESS ARE TABULATED. THE EFFECT OF COMPACTION VARIABILITY ON PERCENTILE DESIGN VALUE AND DESIGN THICKNESS, AND THE EFFECT OF DEGREES OF SATURATION IS TABULATED.

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 137-50

Subject/Index Terms

Filing Info

  • Accession Number: 00230155
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 4 1973 12:00AM