SHEAR AND COMPRESSIONAL VELOCITY MEASUREMENTS
Three groups of 100 ft holes were drilled vertically downward from the floor of U 12e main tunnel and U 12e.03 drift at the Nevada Test Site. Distances between holes in each group varied from 13 to 375 ft. One hole in each group wae used as a shot hole; the others for seismometers to record the energy generated in the shot hole. Two types of recordings were made; one for dilatational or longitudinal ""P"" waves aad one for transverse or shear "S" waves. Simultaneous recordings were made on photographic paper and on magnetic belts with a minimum of three specimen records at each hole for each type of recording The magnetic belts were transcribed to 1/2-in. IRIG tape for computer use. Rock density measurements were also made in the holes. From these data Poisson-s ratio, bulk modulus, rigidity modulus, and Young's modulus were computed. Elastic constant values obtained in situ are much higher than those determined by soils laboratory tests on small rock samples The data obtained are considered to be of exceptionally high accuracy (auth)
- Research Organization:
- United ElectroDynamics, Inc., Pasadena, Calif.; California. Univ., Livermore. Lawrence Radiation Lab.
- DOE Contract Number:
- W-7405-ENG-48
- NSA Number:
- NSA-14-023841
- OSTI ID:
- 4154471
- Report Number(s):
- UCRL-5993
- Resource Relation:
- Other Information: Project HOBO. Orig. Receipt Date: 31-DEC-60
- Country of Publication:
- United States
- Language:
- English
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