The use of a geotechnical centrifuge permits the simulation of long-term groundwater flow conditions through tests on scale models. In a centrifuge, relatively large soil samples can be tested under the same stress conditions as in the prototype. This allows for a more realistic representation of field conditions than is possible in small-scale laboratory experiments. In cases of contaminant migration through relatively impermeable soils, the times of interest span decades and even centuries. The scaling relations can be utilized in solving specific problems of groundwater flow through saturated soil and also to calibrate numerical models that can then be used for prediction purposes. The scaling relationships are established and the results are illustrated through an experiment in modeling of models. Two case studies simulating long-term contaminant migration through soil are presented. In the first, the transport of radioactive contaminants through groundwater was modeled. Geiger-Mueller detectors were used to observe the migration of the radionuclides. This is a nonintrusive method of observation that does not interfere with the normal flow of water through the soil medium. The second case study deals with the behavior of different types of landfill cover materials. Specifically the long-term behavior of paper sludge as a cover material was studied. Thirty years of prototype behavior was simulated in centrifuge tests on two types of paper sludges and on a clay cover used as a control material.


  • English

Media Info

  • Features: Figures; References;
  • Pagination: p. 47-54
  • Monograph Title: Subsurface drainage, soil-fluid interface phenomena, and management of unpaved surfaces
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00666229
  • Record Type: Publication
  • ISBN: 0309055113
  • Files: TRIS, TRB
  • Created Date: Sep 16 1994 12:00AM