IMPORTANT CONSIDERATIONS IN THE DESIGN AND USE OF SOIL PRESSURE CELLS

STUDY OF THE PERFORMANCE OF PRESSURE CELLS OF THE PNEUMATIC TYPE INDICATES THAT THE PROBLEM OF ACCURATELY MEASURING SOIL PRESSURES IS A DIFFICULT ONE. TESTS SHOW THAT WHEN THE CELL DOES NOT HAVE A RIM AROUND THE PRESSURE SENSITIVE FACE, THE PRESSURES THAT IT IS APT TO RECORD IN SOILS WILL VARY DIRECTLY AS THE PERIMETER-AREA RATIO OF THE CELL AND THAT AS ITS THICKNESS IS INCREASED THE EFFECT OF SIZE BECOMES MORE PRONOUNCED, I.E., THE SMALLER THE CELL AND THE GREATER ITS THICKNESS THE HIGHER THE RECORDED PRESSURES WILL BE. THE PRESENCE OF A RIM AROUND THE PRESSURE SENSITIVE FACE SERVES TO COMPENSATE FOR THE EFFECT OF CELL THICKNESS. THE REPORT SUGGESTS THAT THE PROBLEM OF MEASURING PRESSURES CAN BEST BE APPROACHED BY SYSTEMATIC STUDY OF THE DESIGN FEATURES OF CELLS THAT SATISFY PRACTICAL REQUIREMENTS AS TO DIMENSIONS AND MATERIALS TO THE END THAT THESE MAY BE USED WITH A FULL KNOWLEDGE OF THEIR ACCURACY AND OTHER CHARACTERISTICS. /AUTHOR/

  • Supplemental Notes:
    • Vol 20, pp 299 - 313, 14 FIG, 3 TAB
  • Authors:
    • Benkelman, A C
    • LANCASTER, R J
  • Publication Date: 1941

Media Info

  • Monograph Title: Proceedings of the Twentieth Annual Meeting of the Highway Research Board Held at Washington, D.C. December 3-6, 1940
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00229973
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 15 1971 12:00AM