Results 251 to 260 of about 220,127 (302)

Dependencies of Shear Wave Velocity and Shear Modulus of Soil on Saturation

Journal of Engineering Mechanics - ASCE, 2016
AbstractShear wave propagation in soil is a physical phenomenon and has been used widely for monitoring and seismic property assessment in geotechnical engineering. Shear wave velocity Vs and small-strain shear modulus G0 are the key parameters in defining material response to various dynamic loadings.
Yi Dong, Ning Lu
exaly   +2 more sources

Velocities of compressional and shear waves in limestones

Geophysical Prospecting, 2003
Carbonate rocks are important hydrocarbon reservoir rocks with complex textures and petrophysical properties (porosity and permeability) mainly resulting from various diagenetic processes (compaction, dissolution, precipitation, cementation, etc.). These complexities make prediction of reservoir characteristics (e.g.
Assefa, S., McCann, C., Sothcott, J.
openaire   +3 more sources

Shear‐wave velocity estimation

SEG Technical Program Expanded Abstracts 1993, 1993
Shear-wave velocity estimation from principally porosity, clay content and compressional velocity has been widely studied by different authors for different core samples. When comparing the results of the velocity estimated with those laws and the velocity measured on core or with sonic logs and seismic data, discrepancies are often seen.
F. Lefeuvre, P. Desegaulx, M. L. Baratin
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A further comparison of shear-wave velocities

Canadian Geotechnical Journal, 1982
In a previous paper by the same authors the values of the shear-wave velocity in natural soils found from laboratory tests were compared with wave velocities measured in situ. Dynamic free-vibration torsion tests were carried out in the laboratory on undisturbed 150 × 75 mm soil samples. Downhole seismic tests were performed at the site to measure the
T. J. Larkin, P. W. Taylor
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Shear wave velocity in surface sediments

Jökull, 2011
Surface sediments of different nature are common in Iceland. Natural soil sites and man-made fillings commonly serve as foundations for different types of structures. In Civil engineering work it is fundamental to know the geotechnical properties of these materials in the upper 20–30 m.
Bjarni Bessason, Sigurður Erlingsson
openaire   +1 more source

Surface Wave Inversion for Shear Wave Velocity

1991
Land based seismic exploration has typically viewed the surface wave or ground roll as undesirable noise while earthquake seismology has been able to use the surface wave to invert for lateral variations in crust-upper mantle shear-wave velocity. Although surface-wave inversion techniques for shear-wave velocity and shear-wave Q are easy to apply once ...
R. B. Herrmann, G. I. Al-Eqabi
openaire   +1 more source

On linear wave motions in magnetic-velocity shears

Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1977
Abstract The propagation properties of linear wave motions in magnetic and/or velocity shears which vary in one coordinate z (say) are usually governed by a second order linear ordinary differential equation in the independent variable z. It is proved that associated with any such differential equation there always exists a quantity A
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Shear wave velocities in the Earth's mantle

Physics of the Earth and Planetary Interiors, 1972
Direct measurement of the travel time gradient for S waves together with travel time data are used to derive a shear velocity model for the earth's mantle. In order to satisfy the data it is necessary to discard the usual assumption of lateral homogeneity below shallow depths.
Russell Robinson, Robert L. Kovach
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Shear Wave Velocity in Marine Sediment

Japanese Journal of Applied Physics, 2006
The shear wave velocity in surficial marine sediment is important evaluating the physical properties of such sediment. In this study, the dispersion of the shear wave velocity is investigated using the Biot–Stoll model. Next, the shear wave velocities of air- and water-saturated beach sands are measured at a low overburden stress, and the shear moduli ...
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Means for obtaining shear wave velocities

The Journal of the Acoustical Society of America, 1989
The present invention provides a method of logging a subterranean formation through a wellbore containing a fluid, wherein no shear wave signal is obtainable utilizing conventional sonic well logging tools suspended in the wellbore. The shear wave signal is not obtainable usually because the acoustic velocity of the wellbore fluid is greater than the ...
openaire   +1 more source