Assessing Liquefaction Potential Based on Cone Penetration Test Results

Pezeshki Najafabadi, Ali | 2020

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 53580 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Ahmadi, Mohammad Mehdi
  7. Abstract:
  8. This study aimed to model the cone penetration test using FLAC 2D software in order to investigate the silty soils that can be found in tailing dams. Additionally, the model of the direct simple shear test was built in the software to estimate the variation of liquefaction potential in these soils with in-situ conditions. It should be noted that the constitutive law used in this study was the NORSAND model which meets the requirements of modeling in both tests. After validating the models, several important parameters are considered as variables to examine their effects on the results of both experiments. Regarding the validation of the models, the constructed numerical models of the cone penetration test and the cyclic simple shear test show acceptable agreement with filed and laboratory results, respectively. Further, changes in liquefaction potential with the results of the cone penetration test have been investigated. Analyses indicated that variation of tip resistance and excess pore water pressure in silts with some parameters is different from those in sands. Therefore, the criteria presented for evaluating liquefaction potential based on sands may not provide correct results
  9. Keywords:
  10. Liquefaction ; Cone Penetration Test ; Excess Pore Water Pressure ; Cone Resistance ; Silty Sand ; Dynamic Simple Shear Apparatus ; NORSAND Constitutive Law

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