ESTIMATING CONSOLIDATION SETTLEMENTS OF SHALLOW FOUNDATIONS ON OVERCONSOLIDATED CLAY

Procedures are recommended for estimating the consolidation settlements with a minimum of error, perhaps less than 50 percent. It is recommended that the initial effective vertical overburden pressure be reapplied and then the sample be sorrounded with water and the dial reading allowed to equlibrate before consolidation testing is commenced. The change in height should be recorded; if there is a swelling tendency, an additional stress increment should be applied. The stress increments in the consolidation test should be large enough so that the consolidation process can be identified from the settlement versus time readings. For lightly overconsolidated clays the minimum possible stress increments should be used. The measured data should be plotted to see whether Terzaghi type of settlement versus time curve has been obtained. The duration of each load increment should be kept approximately constant, and long periods of secondary compression should be avoided. Factors on which the recompression index depends are listed, and the calculation of consolidation settlements is discussed.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/sr/sr163/sr163-002.pdf
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/0360859X
• Supplemental Notes:
  • Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Corporate Authors:

  Transportation Research Board (TRB)

  Washington, DC   
• Authors:
  • Leonards, G A
• Publication Date: 1976

Media Info

• Media Type: Digital/other
• Features: Figures;
• Pagination: pp 13-16
• Monograph Title: Estimation of consolidation settlement: manual of practice
• Serial:
  • Transportation Research Board Special Report
  • Issue Number: 163
  • Publisher: Transportation Research Board
  • ISSN: 0360-859X

Subject/Index Terms

• TRT Terms: Calculation; Clay; Compression; Estimating; Foundations; Ground settlement; Mat foundations; Overburdens; Overconsolidation; Pressure; Soil consolidation test; Stresses; Time
• Uncontrolled Terms: Computation; Increments
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00134874
• Record Type: Publication
• Files: TRIS, TRB, ATRI
• Created Date: Oct 6 1976 12:00AM