DETERMINATION OF MODULUS OF SOIL REACTION FROM STANDARD SOIL TESTS

IN 1942, SPANGLER PRESENTED AN EQUATION FOR DETERMINING THE DEFLECTION OF FLEXIBLE METAL PIPE EMBEDDED IN SOIL. THE FORMULA INVOLVED A SOIL MODULUS CALLED THE MODULUS OF SOIL REACTION. TO DATE, NO PRACTICAL MEANS HAVE BEEN PRESENTED FOR DETERMINING THIS MODULUS FOR DESIGN PURPOSES. THE OBJECTIVE OF THIS RESEARCH PROGRAM WAS TO FIND A CORRELATION BETWEEN THE MODULUS OF SOIL REACTION (E') AND THE RESULTS OBTAINED FROM THE CBR TEST, HVEEM'S STABILOMETER TEST AND STANDARD SOIL PROPERTIES SUCH AS DENSITY, COMPACTION, MOISTURE CONTENT, AND PLASTICITY INDEX. THE THEORY OF ELASTICITY WAS USED TO DETERMINE THE RELATIONSHIP BETWEEN E' AND THE CBR VALUE. LABORATORY TESTS SHOW THAT THE RELATIONSHIP OBTAINED YIELDS RESULTS SATISFACTORY FOR MOST DESIGN SITUATIONS. SUGGESTED DESIGN VALUES BASED ON THE CBR TEST ARE ALSO GIVEN. THE RELATIONSHIP BETWEEN E' AND THE R- VALUE DETERMINED FROM HVEEM'S STABILOMETER TEST WAS DETERMINED BY USING AN EMPIRICAL CORRELATION PRESENTED BY THE CALIFORNIA DIVISION OF HIGHWAYS BETWEEN THE R-VALUE AND THE PLATE-BEARING TEST. THE THEORY OF ELASTICITY WAS THEN USED TO RELATE THE PLATE-BEARING TEST TO THE MODULUS OF SOIL REACTION. SLIGHT EMPIRICAL ADJUSTMENTS HAD TO BE MADE IN THE CALIFORNIA CORRELATION; HOWEVER, LABORATORY RESULTS INDICATE A SATISFACTORY CORRELATION. FOR THE SITUATION WHERE THE INSTALLATION IS TO BE SMALL AND LABORATORY TESTS SUCH AS THE ONES JUST DESCRIBED ARE NOT FEASIBLE, THE MODULUS OF SOIL REACTION HAS BEEN RELATED TO RELATIVE COMPACTION OF THE SOIL. OTHER ITEMS INCLUDED IN THE DIMENSIONAL ANALYSIS WERE UNIT WEIGHT, PLASTICITY INDEX, MOISTURE CONTENT AND THE DIFFERENCE IN DENSITY BETWEEN THE AASHO DESIGNATION T180 AND T99 STANDARD COMPACTION TESTS. THE RESULTS OF THE STUDY INDICATE THAT APPROXIMATE VALUE FOR THE MODULUS OF SOIL REACTION CAN BE OBTAINED FROM A SIMPLE COMPACTION TEST. /AUTHOR/

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 1-12
  • Monograph Title: Laboratory and field soil tests; lateritic soils
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00229723
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 15 2004 2:39AM