AUTOMATED INVERSION PROCEDURE FOR SPECTRAL ANALYSIS OF SURFACE WAVES

The usual inversion procedures for spectral analysis of surface waves (SASW) testing assume that only one Rayleigh mode is dominant, and thus fail to give reliable results for irregular soil profiles and some complex pavement systems. A new inversion algorithm is presented that is based on the numerical simulation of an actual SASW test, thus enabling the contributions of all types of waves and their modes to be taken into account. The algorithm also benefits from a nonlinear minimization technique in addition to the current linearized minimization to improve robustness of the inversion. Artificial irregular profiles, including a profile with a softer layer trapped between two stiffer layers, a profile with a stiffer layer sandwiched between two softer layers, and a profile with softer layers at larger depths, as well as two experimental pavement profiles have all been successfully inverted.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/3519342
• Supplemental Notes:
  • This study was supported by grant number MSS-9210831 from the National Science Foundation and project 0-1735 from the Texas Department of Transportation.
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Ganji, V
  • Gucunski, N
  • Nazarian, S
• Publication Date: 1998-8

Language

• English

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 757-770
• Serial:
  • Journal of Geotechnical and Geoenvironmental Engineering
  • Volume: 124
  • Issue Number: 8
  • Publisher: American Society of Civil Engineers
  • ISSN: 1090-0241
  • Serial URL: http://ojps.aip.org/gto

Subject/Index Terms

• TRT Terms: Algorithms; Pavements; Rayleigh waves; Simulation; Soft soils; Soil profiles; Spectrum analysis; Stiffness; Tests
• Candidate Terms: Spectral analysis of surface waves
• Uncontrolled Terms: Robustness
• Old TRIS Terms: Inversion procedures
• Subject Areas: Geotechnology; Highways; Pavements; I23: Properties of Road Surfaces; I41: General Soil Surveys;

Filing Info

• Accession Number: 00753285
• Record Type: Publication
• Contract Numbers: RTA65T128, BCS-9116339, A-037
• Files: TRIS
• Created Date: Sep 18 1998 12:00AM