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International Journal of Soil Science
  Year: 2009 | Volume: 4 | Issue: 2 | Page No.: 57-66
DOI: 10.3923/ijss.2009.57.66
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Influence of Compaction Curve Modeling on Void Ratio and Pre-Consolidation Stress

S. Narra

The objective of this study is to investigate the influence of different consolidation curve models on the initial void ratio values and through which on the obtained pre-consolidation stress. Further, this study verifies the dependence of pre-consolidation stress on the initial void ratio value measured at 1 kPa. This was done in order to check the trend between the consolidation curve models and the deviation in pre-consolidation stresses. Three different Oedometer tests have been carried out which were denoted as undisturbed, disturbed and disturbed-rewetted. The curves were fitted using two different curve models (Assouline and Van Genuchten models) and the graphical calculation of the pre-consolidation stress was done using two different methods (Casagrande and Silva methods). The curve models are applied on the compaction data obtained from the soil classified as loamy sand. A good consolidation curve fit to the data (R2 ranging between 0.97 and 0.99) has been verified for a wide range of applied stresses (0 to 2500 kPa), including stresses less than the pre-consolidation stress. Huge differences in the initial void ratio values (Δe ranging between 0.003 and 0.423) have been observed with different curve models and with which a huge difference in pre-consolidation stresses (ΔP ranging between 0 and 57 kPa) have been observed. This study clearly showed that the pre-consolidation value obtained was mainly dependent on the curve fitting model and also on the calculating method. This study also showed a dependence of pre-consolidation stress over the void ratio measured at 1 kPa.
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  •    Modelling Water-Induced Compaction of the SaalianGlacial till in Lower Lusatia
  •    Assessing the Load Size Effect in the Soil (Under Single Foundation) Using Finite Element Method
How to cite this article:

S. Narra , 2009. Influence of Compaction Curve Modeling on Void Ratio and Pre-Consolidation Stress. International Journal of Soil Science, 4: 57-66.

DOI: 10.3923/ijss.2009.57.66






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