Geotechnical field measurements: G-tunnel, Nevada Test Site
The FY81 geotechnical measurements focused on borehole measurements in the Grouse Canyon welded tuff in G-tunnel on the Nevada Test Site. These ambient temperature measurements were taken to: (1) establish baseline reference field data, and (2) gain field testing experience in welded tuff. The in situ state of stress was obtained using the three-hole overcoring method with the US Bureau of Mines three-component borehole deformation gage. The orthogonal horizontal stresses were 5.5 and 0.3 MPa and the nominal vertical was 8.5. Biaxial tests were performed on recovered cores and the average modulus of deformation was 31 GPa. The modulus of deformation using the borehole jack (Goodman) had an average value of 12 GPa. This value is not corrected for effective bearing contact area. Two orthogonal boreholes were used to determine the range of hydraulic conductivities. The range was from 0.022 cm/s (22 Darcy`s) to 1.923 cm/s (1988 Darcy`s).
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 59463
- Report Number(s):
- SAND--81-1971; ON: DE82019963
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
58 GEOSCIENCES
AMBIENT TEMPERATURE
BOREHOLES
DEFORMATION
DRILL CORES
EXPERIMENTAL DATA
FIELD TESTS
FRACTURES
GEOLOGIC DEPOSITS
HYDROLOGY
MECHANICAL TESTS
NEVADA TEST SITE
PERMEABILITY
RADIOACTIVE WASTE FACILITIES
RADIOACTIVE WASTE STORAGE
ROCK MECHANICS
SITE SELECTION
STRESSES
TUFF
UNDERGROUND STORAGE
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