New approach for calibration and interpretation of IRAD GAGE vibrating-wire stressmeters

Abstract

IRAD GAGE vlbratlng-wlre stressmeters were Installed In the Spent Fuel Facility it the Nevada Test Site to measure the change In In-sltu stress during the Spent Fuel Test-Climax (SFT-C). This paper discusses the results of removing a cylindrical section of rock and gages as a unit through overcorlng, and the subsequent post-test calibrations of the stresstneters In the laboratory. The estimated in-situ stresses based on post test calibration data are quite consistent with those directly measured in nearby holes. The magnitude of stress change calculated from pre-test calibration data is generally much smaller than that estimated from post test calibration data. RESUME Des jauges de contreinte a corde vlbrante, IRAD, ont etl installies au