Based on the results of this study we achieved several important conclusions such as the discrepancies of the compression and consolidation parameters under the different test conditions from the conventional consolidation test, the effect of size of specimens on the compression and consolidation parameters of clays, the effect of time scale on the interpretation of secondary compression for clays, and the effect of the amount and the duration of surcharge on the long-term settlement of clays.
This study also carried out the consolidation tests for specimens of different size to investigate the size effect of compression and consolidation parameters. The results of the tests are not only to verify whether the compression and consolidation parameters of 2 cm specimen can be applied to predict the consolidation settlement of a thick soil layer in the field, but also to feedback the numerical model.
Furthermore, the construction factors, such as nonlinear parameters, large strain, time-varying load, loading and unloading of arbitrary foundation shape, the settlement of the composite ground reinforced by piles, dewatering and recharging of ground water, and the smear effect and the well resistance of prefabricated vertical drains, are simulated to improve the abilities of the numerical program. The verification of the numerical model with other closed-form solutions or numerical results was performed. Furthermore, the statistical correlations of the compression and consolidation parameters with their physical indexes for many alluvial clays and the experiences of settlement analysis obtained from several engineering projects were also proposed.||en_US|