Influence of experimental conditions on e~log p relation of clay and highly organic soil

As a check on the reliability of one-dimensional consolidation, a review was made of published experimental data concerning the principle settlement computation described by Bjerrum (1967), which showed that the soil model must be clarified by the experimental consolidation behaviors. Standard one-dimensional consolidation tests were performed for undisturbed Hitachi clay and Isehara highly organic soil. In the first series of tests for clay, each load increment was maintained for one or seven days, and in the second series of tests for highly organic soil, two load increment ratios were adopted to check the influence on the e-logp relation. The e-logp relation in the majority of the tests is not significantly affected by the load incremental duration and load increment ratio. A technique is suggested for obtaining the compression index of instant compression line from an observed consolidation time curve and the results of the calculation are given to show the adequacy of the proposed soil model, and further proposed analysis shows that the calculated consolidation curves are in closer agreement with those observed behaviors.