Research Article
Feb 1971
In-Situ Investigation using SH-Waves
Publication: Journal of the Soil Mechanics and Foundations Division
Volume 97, Issue 2
Abstract
The in-situ dynamic shear modulus of pavement materials may be deduced from measurements of the surface phase velocity of horizontally polarized shear waves (SH-waves). The velocity of SH-waves as observed at the surface of layered pavements is dependent on the frequency of wave motion, the material properties and the layer thicknesses. Interpretation of the observed phase velocity dispersion with frequency allows the material properties to be obtained. A torsional vibrator capable of generating continuous SH-waves at the surface of a pavement, and instruments suitable for detecting and measuring the velocity of the resulting wave motion, are described. This equipment was used to obtain dispersion plots on two- and three-layer pavements. Theoretical phase velocity-frequency dispersion relationships are presented, describing the propagation of SH-waves in idealized two- and three-layered pavement-type structures. The observed dispersion plots were interpreted, using theoretical dispersion relationships for comparable idealized structures, to deduce the material properties.
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Published In
Journal of the Soil Mechanics and Foundations Division
Volume 97 • Issue 2 • February 1971
Pages: 341 - 356
Copyright
© 1971 American Society of Civil Engineers.
History
Published in print: Feb 1971
Published online: Feb 12, 2021
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Authors
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Marcis Kurzeme
Res. Scientist; Div. of Appl. Geomechanics, Commonwealth Sci. and Industrial Res. Organization, Syndal, Victoria, Australia
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