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Title: ANALYTICAL EVALUATION OF VARIABLES AFFECTING SURFACE WAVE TESTING OF PAVEMENTS
Accession Number: 00469595
Record Type: Component
Availability: Find a library where document is available Abstract: Spectral-Analysis-of-Surface-Waves (SASW) is a promising nondestructive technique for evaluating the mechanical properties of pavement systems and soil deposits. In applying the technique, it is assumed that only plane Rayleigh waves are generated by the source. In reality, when an impulse is applied at the top of a layered system, body waves (shear and compression waves) and other types of surface waves are produced along with Rayleigh waves. In this paper, the dispersion curves (frequency or wavelength versus phase velocity) obtained by assuming only plane Rayleigh waves are compared with dispersion curves obtained when all types of waves are considered. Several cases with different types of layering are studied, and emphasis is placed on typical pavement systems. It is found that the receiver arrangement can significantly influence the dispersion curve and, hence, the resulting modulus profile. For a typical SASW setup in which the distance from the source to the first receiver is kept equal to the distance between the two receivers, wavelengths considered during analysis of the field data should be equal to or less than one-half of the distance between receivers. If this filtering of low frequencies is not performed, the assumption that only plane Rayleigh waves propagate through the medium can lead to errors when backcalculating physical properties from the dispersion curve.
Supplemental Notes: Publication of this paper sponsored by Committee on Flexible Pavement Design. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
Monograph Title: Monograph Accession #: 01418141
Authors: Sanchez-Salinero, IgnacioRoesset, Jose MShao, Ko-YoungStokoe II, Kenneth HRix, Glenn JPagination: pp 86-95
Publication Date: 1987
Serial: ISBN: 0309045169
Media Type: Print
Features: Figures
(9)
; References
(20)
; Tables
(4)
TRT Terms: Candidate Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces
Files: TRIS, TRB, ATRI
Created Date: Jul 31 1988 12:00AM
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