Abstract
The aim of this paper is to define a guideline for an objective interpretation of oedometer tests on Yoldia clay. The approach followed consists in a first analysis where the separation of strains is applied to the consolidation curves. During this phase, primary consolidation strains are filtered from creep by using Brinch-Hansen, Taylor and ANACONDA method. The second phase of the interpretation aims to determine the preconsolidation stress according to three different theories (Akai, Janbu and Casagrande - Terzaghi). The preconsolidation stress values, as well as the consolidation curves, are slightly influenced by the separation of strains method applied, while using different preconsolidation stress theories deeply affects the final results.
Highlights
The preconsolidation stress vaffilinunaealsl,rreeasssuulwlttss.e.ll as the consolidation curves, are slightly influenced by the separation of strains method applied, while using different preconsolidation stress theories deeply affects the final results
ANACONDA states that the two consolidation phases run simultaneously
Oedometer results on Yoldia clay from two different locations in Denmark are studied in this light
Summary
The preconsolidation stress vaffilinunaealsl,rreeasssuulwlttss.e.ll as the consolidation curves, are slightly influenced by the separation of strains method applied, while using different preconsolidation stress theories deeply affects the final results. By using the theoretical relationship between the consolidation ratio U and the square root of time factor t, Taylor [4] presents the square root of time fitting method. A second line, starting from the same point on the U axis, is drawn with all abscissas 1.15 times higher than the first line. The intersection between this second line and the curve returns U=90%. The three methods applied to separate the total strains tot, between consolidation strains cons, and creep strains creep, are described . ANACONDA states that the two consolidation phases run simultaneously
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