SAND MOVEMENT MEASUREMENT NEAR ANCHOR PLATES

VERY FEW EXPERIMENTAL TECHNIQUES ARE AVAILABLE FOR RECORDING SOIL MOVEMENT IN THE VICINITY OF LABORATORY SCALE FOUNDATIONS. EGGESTAD DEVELOPED INDUCTANCE TYPE SOIL STRAIN METERS AND USED THEM TO RECORD SAND MOVEMENTS BENEATH A SURFACE FOOTING, WHILE ROSCOE AND COWORKERS PIONEERED THE USE OF X-RAY TECHNIQUES FOR SOIL MOVEMENT MEASUREMENT AROUND SMALL SCALE LABORATORY FOUNDATION STRUCTURES. BECAUSE THE INDUCTANCE-TYPE SOIL- STRAIN METER WAS FOUND TO BE UNRELIABLE AND BECAUSE THE USE OF X-RAYS IS EXPENSIVE AND REQUIRES A SMALL SCALE OF TESTING, THE WRITERS DEVELOPED A MECHANICAL METHOD OF SAND MOVEMENT MEASUREMENT AND APPLIED IT TO OBTAIN THE DISTRIBUTION OF MOVEMENTS IN THE SAND AROUND A CIRCULAR ANCHOR PLATE. THE DESIGN AND THE USE OF THIS MECHANICAL GAGE ARE DESCRIBED. /AUTHOR/