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Chapter 16: Theory of Viscoelastic Love Waves and their Potential Application to Near-surface Sensing of Permeability

By
Paul Michaels
Paul Michaels
Boise State University Center for Geophysical Investigation of the Shallow Subsurface, Boise, Idaho, U.S.A.
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Vijay Gottumukkula
Vijay Gottumukkula
ExxonMobil Exploration Company, Houston, Texas, U.S.A.
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Published:
January 01, 2010

Abstract

In computing Love-wave solutions, the choice of constitutive model depends on the domain of application. In the domain of global earthquake seismology, the search for solutions in the complex plane began in the vicinity of the elastic solutions. In the case of near-surface engineering work, damping levels can be large, and elastic stiffness can be much less than in global seismology. Furthermore, the choice of representation should depend on the permeability and degree of water saturation. The study of dry or impermeable soils and rock, where viscous effects are largely absent, has led to an alternative representation for the Kelvin-Voigt damping property. Under that alternative of effective viscosity, the damping ratio is a frequency-independent soil constant. Permeable, water-saturated soils, on the other hand, have shown viscous behavior. A method to solve for Love waves can be used under a truly viscous assumption. Applications would include near-surface remote sensing of either water content or permeability.

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Contents

Geophysical Developments Series

Advances in Near-surface Seismology and Ground-penetrating Radar

Society of Exploration Geophysicists
Volume
15
ISBN electronic:
9781560802259
Publication date:
January 01, 2010

GeoRef

References

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