Journal Published Online: 01 December 1998
Volume 21, Issue 4

Prediction of Field Compressibility from Laboratory Consolidation Tests of Peats and Organic Soils



Gibson and Lo (1961) compressibility parameters a and b for an organic soil can be determined from the organic content and the current pressure using the model presented by Gunaratne et al. (1998). These parameters, however, were developed based on results of laboratory one-dimensional consolidation tests and are valid for the K0 state. Researchers such as Edil et al. (1984) have found that the experimentally determined values of b in particular are larger for field situations. Therefore, the compressibility parameters have to be modified to predict field settlement under surcharges. This paper describes an extended model that addresses this issue and demonstrates how the laboratory-based b value can be corrected for field loading conditions. Finally, results of a full-scale, instrumented field settlement study of organic soil are shown to correlate well with the predictions of the extended model.

Author Information

Stinnette, P
Hillsborough Community College, Plant City, FL
Pages: 10
Price: $25.00
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Stock #: GTJ11369J
ISSN: 0149-6115
DOI: 10.1520/GTJ11369J