APPLICATION OF THE TISAR TECHNIQUE TO THE INVESTIGATIONS OF TRANSPORTATION FACILITIES AND DETECTION OF UTILITIES

The use of frequency analysis of seismic data for shallow applications has been extensively investigated in the last decades. MASW and other methods related to surface waves, body waves and/or guided waves, are significant examples. Another approach is to use the vibratory frequency content information within the data, related to the geometry and the mechanical properties of a layer. The acronym "TISAR" stands for "Testing and Investigation using Seismo-Acoustic Resonance". It is then based on the analysis of the resonance frequencies of the structures under investigation when energized by a transient source. In practice, long recording from multiple seismic receivers allows time and spatial windowings, which are needed for an adequate extraction of the resonant frequencies; however processing is fairly simple. Numerical modeling has shown it to be fairly indicative of the subsurface geometry and diverse applications have demonstrated its usefulness. In this paper, the TISAR technique is shown to be very well adapted for subsurface investigations such as the measurement of asphalt road thickness and the detection of utilities.

Language

  • English

Media Info

  • Pagination: 12p

Subject/Index Terms

Filing Info

  • Accession Number: 00926452
  • Record Type: Publication
  • Files: TRIS, USDOT
  • Created Date: Jun 24 2002 12:00AM