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[Borehole Pressure Cells] Equipment

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<p>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 ...
<p>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 ...
<p>Borehole Pressure Cells have a long term track record of stress monitoring in both elastic and viscoelastic rock. While typically classified as a soft inclusion, the cell may be filled with mercury to gain stiffness for use as a rigid inclusion in low modulus ...
<p>Borehole Pressure Cells have a long term track record of stress monitoring in both elastic and viscoelastic rock</p>
<p>The standard Borehole Pressure Cell (BPC) is used to measure rock stress changes and is designed to be grouted inside a borehole. The BPC is manufactured from two steel plates welded together around their periphery. The plates are deformed into a “dog bone” ...
<p>The Model 4300 Vibrating Wire Borehole Stressmeters are designed to measure stress changes in rock and can be installed in boreholes up to 100 feet deep. The Stressmeter consists of a high strength steel proving ring wedged tightly across one diameter inside ...
<p>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, ...
<p>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 ...