SOME PRINCIPLES OF SOIL SURVEYING AND SOIL MAPPING FOR ROAD PURPOSES

KNOWLEDGE OF SOIL CONDITIONS, REQUIRED FOR THE EFFICIENT DESIGN OF ROADS, NECESSITATES THE MAKING OF SOIL SURVEYS. EXISTING SOIL MAPS AND PROFILES WHICH ARE DESIGNED FOR AGRICULTURAL USE ARE NOT SUFFICIENT FOR THE ROAD ENGINEER. IT IS RECOMMENDED THAT IN ADDITION TO THE SOIL GROUPING DEFINED BY THE BUREAU OF PUBLIC ROADS THE SOILS BE FURTHER CHARACTERIZED WITH RESPECT TO PERMEABILITY AND STABILILITY. A METHOD FOR DETERMINING THE MOISTURE EQUIVALENT OF THE SOIL BY CENTRIFUGING AND A NEW TEST FOR SHEARING RESISTANCE ARE SUGGESTED. THE SHEARING RESISTANCE IS MEASURED BY PULLING OUT A RIGID STAKE THAT HAS BEEN DRIVEN INTO THE SOIL FOR TWELVE INCHES, BY MEANS OF A WIRE CONNECTED TO THE AXLE OF AN AUTOMOBILE THROUGH A DYNOMOMETER. UNDER GENERAL CONSIDERATIONS REFERRING TO SOIL MAPPING AND THE PREPARATION OF SOIL PROFILES, SUBGRADE PROBLEMS ARE DISCUSSED IN CONSIDERABLE DETAIL. DISCUSSIONS ON THE MOISTURE EQUIVALENT AND SHEARING RESISTANCE OF SOILS AND METHODS OF DETERMINING THESE CHARACTERISTICS ARE PROPOSED. SOME GENERAL PRINCIPLES AS TO THE IMPROVEMENTS ARE ADVANCED. /AUTHOR/

  • Supplemental Notes:
    • Vol 11, Pt 1, PP 199-217, 13 FIG, 1 TAB, 13 REF
  • Authors:
    • Krynine, D P
    • Hogentogler, C A
    • Eno, F H
  • Publication Date: 1932

Media Info

  • Monograph Title: Proceedings of the Eleventh Annual Meeting of the Highway Research Board Held at Washington, D.C. December 10-11, 1931. Part I: Reports of Research Committees and Papers
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00202855
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Jun 1 1971 12:00AM