Suitable for measurement of 3-dimensional bedrock stress
This sensor is designed to measure three-dimensional bedrock stress with the borehole bottom strain release method. Strain gages are molded with resin. The sensor is bonded on the bottom wall of the borehole using a fixture and then subjected to over-coring to measure released strain.
|Methods||Kumamoto University method|
|Gage Patterns||8 biaxial gages bonded (16 elements)
Model with 8 triaxial gages (24 elements) can be manufactured on request.
|Models of Strain Gage||KFGS-5-120-D16-11|
|Gage Resistance||120 Ω|
|Gage Factor||Approx. 2.1|
|Gage Length||5 mm|
|Young’s Modulus of Mold Material||100 MPa|
|Borehole Diameter||65 mm|
●Compatible with the conical-ended borehole over-coring technique of The Japan Geotechnical Society
●Installation will be performed by a specialized company. Contact a KYOWA representative for details.