MODULUS OF SOIL REACTION AS DETERMINED FROM THE TRIAXIAL SHEAR TEST

IN 1942 SPANGLER PUBLISHED HIS CLASSICAL THEORY FOR THE DEFLECTION OF UNDERGROUND CONDUITS. THIS THEORY HAS RECEIVED ONLY LIMITED USE, PARTIALLY BECAUSE OF THE INABILITY TO DETERMINE THE PROPER NUMERICAL VALUE OF THE MODULUS OF SOIL REACTION. SEVERAL DIFFERENT ATTEMPTS HAVE BEEN MADE TO DETERMINE THIS MODULUS IN THE LABORATORY BUT EACH HAS MET WITH ONLY LIMITED SUCCESS. BURNS AND RICHARDS (1964) SOLVED THE PROBLEM OF THE BURIED CONDUIT USING THE THEORY OF ELASTICITY BY ASSUMING IDEAL ELASTIC CONDITIONS. THEIR EQUATIONS HAVE BEEN USED TO CALCULATE THE MODULUS OF SOIL REACTION. THE ENSUING EQUATION BECAME VERY DIFFICULT TO EVALUATE; THEREFORE, THE COMPUTER WAS USED TO DETERMINE AN APPROXIMATE RELATIONSHIP FOR THE NECESSARY VARIABLES AND THE MODULUS OF SOIL REACTION. THE MODULUS HAS ALSO BEEN SHOWN TO BE DETERMINABLE FROM THE TRIAXIAL SHEAR TEST. THE MODULUS IS DEPENDENT ON POISSONS RATIO AND THE MODULUS OF ELASTICITY. BOTH VALUES CAN BE DETERMINED FROM A SINGLE TRIAXIAL SHEAR TEST. DATA OBTAINED FROM A TRIAXIAL SHEAR TEST ARE USED TO CALCULATE THE MODULUS OF SOIL REACTION WHICH IS THEN COMPARED WITH THE VALUE MEASURED IN THE DEVICE CONSTRUCTED BY WATKINS AND NEILSON CALLED THE MODPARES DEVICE. /AUTHOR/

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/hrr/1967/185/185-006.pdf
• Supplemental Notes:
  • Paper sponsored by Committee on Buried Structures and Committee on Culverts and Culvert Pipe and presented at the 46th Annual Meeting. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Nielson, F Dwayne
• Publication Date: 1967

Media Info

• Media Type: Digital/other
• Features: Appendices; Figures; References; Tables;
• Pagination: pp 80-90
• Monograph Title: Tunneling, geophysical studies and soil-culvert interactions
• Serial:
  • Highway Research Record
  • Issue Number: 185
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Conduits; Deflection; Modulus; Modulus of elasticity; Poisson ratio; Shear stress; Soil mechanics; Triaxial shear tests; Underground structures
• Uncontrolled Terms: Modulus of soil reaction
• Old TRIS Terms: Poissons ratio; Triaxial shear
• Subject Areas: Bridges and other structures; Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00216078
• Record Type: Publication
• Report/Paper Numbers: HS-000 708
• Files: TRIS, TRB
• Created Date: Oct 13 1994 12:00AM