ESTIMATING 1-DIMENSIONAL CONSOLIDATION, INCLUDING SECONDARY COMPRESSION, OF CLAY LOADED FROM OVERCONSOLIDATED TO NORMALLY CONSOLIDATED STATE

The estimation is described of the rate and magnitude of the settlement that will occur, including recompression, virgin compression and secondary compression when a large shallow foundation is placed at a site underlain by saturated clay. The details of the problem are described. The solution outlined here assumes that primary and secondary effects can arbitrarily be separated. Primary consolidation can be predicted from Terzaghi's 1-dimensional consolidation theory or extensions of his theory. The assumptions are listed for a working hypothesis of secondary compression for engineering practice in which the load increment ratio is a sufficient magnitude to cause some primary consolidation. Behavior resulting from the working hypothesis is illustrated in a figure. Comments are made on the test apparatus and procedures, and the evaluation of individual test results is discussed. The evaluation of overall soil properties (amount of primary settlement, rate of primary settlement, rate of secondary compression, and combined primary and secondary compression) is also discussed.

• Record URL:
  • https://onlinepubs.trb.org/Onlinepubs/sr/sr163/163-003.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:
  • Raymond, G P
  • Wahls, Harvey E
• Publication Date: 1976

Media Info

• Media Type: Digital/other
• Features: Figures; References;
• Pagination: pp 17-23
• 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: Clay; Compression; Consolidation; Estimating; Foundations; Ground settlement; Loads; Mat foundations; Overconsolidation; Properties of materials; Saturated soils; Soils; Terzaghi's rule; Testing
• Uncontrolled Terms: Soil properties
• Old TRIS Terms: One dimensional consolidation; Primary consolidation; Recompression; Secondary compression
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00134875
• Record Type: Publication
• Files: TRIS, TRB, ATRI
• Created Date: Oct 6 1976 12:00AM