Nondestructive determination of material stiffness for potential application at dams and landfills

David W. Sykora

doi:10.1117/12.209403

12 May 1995 Nondestructive determination of material stiffness for potential application at dams and landfills

David W. Sykora

Proceedings Volume 2457, Nondestructive Evaluation of Aging Structures and Dams; (1995) https://doi.org/10.1117/12.209403
Event: Nondestructive Evaluation of Aging Infrastructure, 1995, Oakland, CA, United States

Abstract

Most conventional seismic geophysical means of determining material stiffness (e.g., shear modulus) for engineering studies have important limitations when used at dams and landfills because they are intrusive and the results are adversely affected by the inherent non-isotropic state of stress beneath slopes. One exception is the spectral-analysis-of-surface-waves (SASW) method which provides a non-destructive and non-intrusive means of measuring Rayleigh wave dispersion which can then be used to determine the vertical variation of material stiffness. The SASW method was developed under `level ground' assumptions and has proven to be an effective method for layered media. The SASW method was recently found to be an appropriate method to determine stiffness for sloping ground conditions. The potential application of the SASW method to slopes of dams and landfills is addressed by presenting the results of this theoretical study of surface wave propagation in sloping ground and a validation study at a sloping ground site.

Citation Download Citation

David W. Sykora "Nondestructive determination of material stiffness for potential application at dams and landfills", Proc. SPIE 2457, Nondestructive Evaluation of Aging Structures and Dams, (12 May 1995); https://doi.org/10.1117/12.209403

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