Three-dimensional strain monitor for rock boreholes

Details Three-dimensional strain monitor for rock boreholes Three-dimensional strain monitor for rock boreholes

1991-05-02

1992-05-19

Myracle, Jerry W.

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

Earth stresses

G01B 716

Patent

active

051137070

ABSTRACT:
The invention relates to a device for monitoring strain or deformation within rock boreholes in three-dimension. The device comprises in general a vibrating wire strain monitor for monitoring strain or deformation in an axial direction with respect to the borehole axis interposed between two other vibrating wire string monitors which monitor strain or deformation in radial directions with respect to the borehole axis. The radial vibrating wire strain monitors each have elements by which they may be anchored within a borehole. Together, the three vibrating wire strain monitors monitor strain or deformation in three orthogonal directions within a borehole. The combination allows the axial vibrating wire strain monitor to utilize the radial vibrating wire strain monitor's anchors thereby eliminating their requirement to provide separate anchoring means therefor.

REFERENCES:
patent: 4813278 (1989-03-01), Kosugi
patent: 4858472 (1989-08-01), Herget et al.

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