QUASI-PRECONSOLIDATION EFFECTS DEVELOPED IN NORMALLY CONSOLIDATED CLAYS

概要

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When a load is applied to a normally consolidated clay which has experienced secondary compression, the skeleton of soil particles can sustain a part of the load increment, before sliding of particles will be initiated at a certain pressure. This is referred to a quasi-preconsolidation effect. The quasi-preconsolidation effect can be mostly explained by Bjerrum's concept concerning the delayed compression of a clay. However, in general, there exists some difference between the observed and the estimated values of quasi-preconsolidation pressure. In the present Note, the degree of the difference and its characteristics are examined through consolidation tests on various clayey soils. As a result of these tests, it is found that the degree of difference is unchanged by consolidation pressure, but is influenced by the duration of sustained loading at a previous stage and has some relation with the properties of a clay.
社団法人地盤工学会の論文
1992-12-15