Consolidation Parameters Interpretation of CPTU Dissipation Data Based on Strain Path Theory for Soft Jiangsu Quaternary Clays |
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| Authors: | Guojun Cai Songyu Liu Anand J. Puppala |
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| Affiliation: | 1. Institute of Geotechnical Engineering , Southeast University , Nanjing , Jiangsu , China focuscai@163.com;3. Institute of Geotechnical Engineering , Southeast University , Nanjing , Jiangsu , China;4. Department of Civil Engineering , The University of Texas at Arlington , Arlington , TX , USA |
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| Abstract: | When a piezocone (CPTU) penetrates the ground, pore pressures are set up due to the stress changes. Pore pressure dissipation occurs in the subsequent consolidation process in a manner dependent on the initial stress distribution. The process of analysis can be used to interpret the consolidation parameters from CPTU data based on strain path approach. For the two approaches to the CPTU analysis, the Houlsby and Teh method used an elastic-plastic model, while the Levadoux and Baligh solution used parameters specifically appropriate for Boston Blue Clay. This article discusses a comparison between the two theoretical predictions and field CPTU measurements deployed in Jiangsu (China) Quaternary clays. The values of the coefficient of consolidation calculated from the two methods are then compared with high-quality laboratory tests. Both theoretical predictions provide good agreement for the shape of the dissipation curve, but the predicted c h values are different and thought should indeed be given to the use of an appropriate value of G/s u. |
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| Keywords: | clays coefficient of consolidation piezocone pore pressure strain path |
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