In situ measurement technique for compressional wave velocity dispersion

2004 ◽  
Vol 116 (4) ◽  
pp. 2556-2556
Author(s):  
Charles W. Holland ◽  
Jan Dettmer ◽  
Stan E. Dosso
Keyword(s):  
Wave Velocity ◽  
Measurement Technique ◽  
Velocity Dispersion ◽  
Compressional Wave ◽  
In Situ Measurement ◽  
Compressional Wave Velocity

DEPENDENCE OF IN‐SITU COMPRESSIONAL‐WAVE VELOCITY ON POROSITY IN UNSATURATED ROCKS

Geophysics ◽  
1972 ◽  
Vol 37 (1) ◽  
pp. 29-35 ◽  
Author(s):  
Joel S. Watkins ◽  
Lawrence A. Walters ◽  
Richard H. Godson
Keyword(s):  
Wave Velocity ◽  
Seismic Refraction ◽  
Compressional Wave ◽  
Unconsolidated Sediments ◽  
Compressional Wave Velocity ◽  
Near Surface ◽  
Least Squares Fit ◽  
Water Saturated ◽  
Porosity Range

The relation of in‐situ compressional‐wave velocities to porosities, determined by seismic refraction for unsaturated near‐surface rocks from different areas in Arizona, New Mexico, and California, is grossly similar to relations determined by other investigators for water‐saturated rock and unconsolidated sediments. The principal difference is that in the porosity range 0.0–0.2, compressional waves travel somewhat more slowly in unsaturated rocks than in water‐saturated rocks, and much more slowly, in the porosity range 0.2–0.8. The function, ϕ=−0.175 ln (α)+1.56, where ϕ is the fractional porosity and α is the compressional‐wave velocity, was obtained as a least squares fit to the experimental data. Bulk densities are reported for all samples; moisture contents are reported in some instances.

In-Situ Measurement Technique of Stress and Structure Change

2015 ◽  
Vol 84 (8) ◽  
pp. 567-572
Author(s):  
Tadafumi HASHIMOTO ◽  
Masahito MOCHIZUKI
Keyword(s):  
Measurement Technique ◽  
Structure Change ◽  
In Situ Measurement
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