Portfolio Tag: Stressmeters

Borehole Deformation Gages

Borehole Deformation Gages
The Model 5000 Borehole Deformation Gage is the proven USBM-style gage used to measure in situ rock stresses using the overcoring technique in rock that is competent and elastic. The measurement of in situ stresses is important in the design of underground openings such as power houses, crushing stations, mines, tunnels and the like. It…
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Concrete Stressmeters (VW)

Concrete Stressmeters (VW)
The Model 4370 Concrete Stressmeter comprises a short vibrating wire load cell in series with a longer cylinder of concrete. This concrete cylinder has the same properties as the surrounding concrete but is de-bonded from it by means of a smooth-walled, porous plastic tube. It’s coupled at its ends to the surrounding concrete by means…
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Soft Inclusion Stress Cells (VW)

Soft Inclusion Stress Cells (VW)
The Model 4360 Vibrating Wire Soft Inclusion Stress Cells (SISC) are larger versions of the Model 4300 Borehole Stressmeters. The SISC is pre-loaded by wedging it into a large size diamond drill hole using an integral screw mechanism or hydraulic piston and can be set to measure both tensile and/or compression stress changes. It has…
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Biaxial Stressmeters (VW)

Biaxial Stressmeters (VW)
The Model 4350 Vibrating Wire Biaxial Stressmeter is designed to measure compressive stress changes in rock, salt, concrete or ice. Three or six Vibrating Wire sensors oriented at 60° intervals allow the principal stress changes to be measured in the plane perpendicular to the stressmeter axis. The stressmeter consists of a high strength steel cylinder…
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