Prediction of Field Compressibility from Laboratory Consolidation Tests of Peats and Organic Soils
Stinnette P
(Received 29 May 1995; accepted 6 July 1998)

Abstract
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.

Keywords:
consolidation, organic soil, peat, ultimate settlement

Paper ID: 4234XXX2

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Author Stinnette P Title Prediction of Field Compressibility from Laboratory Consolidation Tests of Peats and Organic Soils Symposium , Committee on