PRESSURE-TIME RELATIONSHIP IN LATERALLY STRESSED FROZEN GRANULAR SOILS

A FROZEN SAND--ICE LAYER, WHEN SUBJECTED TO LATERAL PRESSURE AT A CONSTANT TEMPERATURE SHOWS REDUCTION IN STRESS WITH TIME. INVESTIGATIONS WERE CARRIED OUT TO STUDY THE GENERAL TENDENCY OF THIS REDUCTION IN LATERAL STRESS AND ALSO TO INVESTIGATE THE EFFECTS OF CERTAIN PARAMETERS INFLUENCING THIS BEHAVIOR. TWO DIFFERENT TYPES OF SAND WERE USED TO PREPARE THE SAND--ICE SPECIMENS WITH A VAREITY OF INITIAL POROSITY AND DEGREE OF ICE SATURATION. THEY WERE TESTED AT VARIOUS CONSTANT TEMPERATURE UNDER SELECTED INITIAL PRESSURES. THE MAGNITUDE OF PRESSURE RETAINED BY A FROZEN SAND SAMPLE AT ANY TIME, AFTER COMMENCEMENT OF THE EXPERIMENT, WAS MEASURED BY MEANS OF A PRESSURE GAUGE ATTACHED TO THE "PRESSURE UNIT." THE REDUCTION IN LATERAL STRESS, EXPRESSED AS A PERCENTAGE OF INITIAL PRESSURE APPLIED TO A FROZEN SAND LAYER, WAS STUDIED AS A FUNCTION OF FIVE VARIABLES: INITIAL PRESSURE, THE INITIAL POROSITY OF THE SAND, THE DEGREE OF ICE SATURATION, TEMPERATURE OF SAMPLE, AND TIME ELAPSED AFTER THE APPLICATION OF INITIAL PRESSURE. EXPERIMENTAL RESULTS WERE PLOTTED IN THE FORM OF PRESSURE--TIME CURVES TO STUDY THE TIME-DEPENDENT BEHAVIOR OF THE SAND--ICE SYSTEM UNDER APPLIED LOAD. ALSO, REDUCTION IN STRESS WAS PLOTTED AGAINST EACH OF THE PREVIOUSLY MENTIONED VARIABLES TO SHOW THEIR INFLUENCE ON THE REDUCTION IN LATERAL STRESS. A GENERAL EQUATION TO PREDICT THE VALUE OF LATERAL PRESSURE RETAINED BY THE SAND--ICE LAYER AT ANY TIME AFTER THE APPLICATION OF A KNOWN INITIAL PRESSURE WAS DERIVED EMPIRICALLY IN TERMS OF THE FIVE VARIABLES.

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 79-87
  • Monograph Title: FROST ACTION IN SOILS
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00238083
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Feb 23 1973 12:00AM