MEASUREMENT OF DYNAMIC SOIL PROPERTIES

In this article, the author attempts to summarize material from earlier studies, other papers and recent developments, and to integrate results from both laboratory and field data where possible. Several important categories of dynamic soil tests are described and include the following: strain-rate tests; resonant column tests; ultrasonic pulse tests; cyclic tests. With respect to field techniques, specific recommendations and comments are included and are directed towards the adaptation of well-known seismic technique to measurement of dynamic soil properties for engineering purposes. The seismic techniques described include the following: Seismic refraction survey; seismic down-hole survey; surface wave techniques; standard penetration test; frequency domain measurements; cylindrical in situ test. To narrow the gap between field and laboratory data, several steps are necessary. Important areas of research involve eliminating disturbances, developing uniformity in lab specimen preparation, and developing consistency in laboratory and field test performance. Appropriate attention must also be paid to stress-history and time effects. Another major uncertainty in interpreting lab and field data is the use of Poisson's ration in converting E to G or vice versa. Two current practices which run counter to desired goals of correlation between lab and field results are: 1) performing only short term lab tests for modules and damping, and 2) selection of field seismic techniques without regard to engineering use of the data.

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 91-178

Subject/Index Terms

Filing Info

  • Accession Number: 00179745
  • Record Type: Publication
  • Report/Paper Numbers: Proceeding
  • Files: TRIS
  • Created Date: Oct 12 1978 12:00AM