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Estimation of preconsolidation stress of clays from piezocone by means of high-quality calibration data

1 Norwegian Geotechnical Institute, Sognsveien 72, 0855 Oslo, Norway
2 Tampere University, Korkeakoulunkatu 5, 33720 Tampere, Finland

Special Issues: Characterization and Engineering Properties of Natural Soils used for geotesting

An extensive database of high-quality piezocone (CPTU) and laboratory oedometer test data on onshore and offshore clays worldwide has been established. The database covers a wide range of index parameters and overconsolidation ratios (OCR) in the range 1 to 5. The purpose is to derive general correlations to model preconsolidation stress in clays from CPTU data based on high-quality laboratory data. Several studies have already discussed such correlations for different clay types, where the preconsolidation stress is defined as a function of the cone resistance and/or the pore pressure measured in CPTU tests. Often, these correlations are characterized by high uncertainty, mainly because of the sample quality of the laboratory data. New correlations are proposed based on the new database. These correlations are meant to be used for preliminary assessment of preconsolidation stress in the absence of laboratory data or as a comparison tool when limited test data is available.
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Keywords preconsolidation stress; OCR; CPTU; correlation; clay

Citation: Marco DIgnazio, Tom Lunne, Knut. H. Andersen, Shaoli Yang, Bruno Di Buò, Tim Länsivaara. Estimation of preconsolidation stress of clays from piezocone by means of high-quality calibration data. AIMS Geosciences, 2019, 5(2): 104-116. doi: 10.3934/geosci.2019.2.104


  • 1. Bjerrum L (1973) Problems of Soil Mechanics and Construction on Soft Clays. State-of-the-art report. In Proceedings, 8th ICSMFE, Moscow 3: 111–159.
  • 2. Ladd CC, Foott R (1974) A new design procedure for stability of soft clays. J Geotech Geoenviron Eng 100: 763–786.
  • 3. Larsson R (1980) Undrained shear strength in stability calculation of embankments and foundations on soft clays. Can Geotech J 17: 591–602.    
  • 4. D'Ignazio M, Phoon KK, Tan SA, et al. (2016). Correlations for undrained shear strength of Finnish soft clays. Can Geotech J 53: 1628–1645.    
  • 5. Lunne T, Berre T, Strandvik S (1997) Sample disturbance effects in soft low plastic Norwegian clay. In Proceedings of the Conference on Recent Developments in Soil and Pavement Mechanics, Rio de Janeiro, 81–102.
  • 6. Lunne T, Berre T, Andersen KH, et al. (2006) Effects of sample disturbance and consolidation procedures on measured shear strength of soft marine Norwegian clays. Can Geotech J 43: 726–750.    
  • 7. Di Buò B, Selänpää J, Lansivaara,T, et al. (2018) Evaluation of existing CPTu-based correlations for the deformation properties of Finnish soft clays. In Cone Penetration Testing IV, Proceedings of the 4th International Symposium on Cone Penetration Testing (CPT 2018), Delft, 185–191.
  • 8. Di Buò B, Selänpää J, Länsivaara T, et al. (2018) Evaluation of sample quality from different sampling methods in Finnish soft sensitive clays. Can Geotech J.
  • 9. Paniagua P, L'Heureux JS, Yang SL, et al. (2016) Study on the practices for preconsolidation stress evaluation from oedometer tests. In Proceedings of the 17th Nordic Geotechnical Meeting (NGM).
  • 10. Robertson PK, Howie JA, Sully JP, et al. (1988) Discussion on Preconsolidation pressure from piezocone tests in marine clay by J.M. Konrad and K. Law. Géotechnique 38: 455–465.
  • 11. Mayne PW (1986) CPT indexing of in situ OCR in clays. In Proceedings of ASCE conference on Use of In-Situ Tests in Geotechnical Engineering (In-situ '86), Blacksburg, 780–793.
  • 12. Mayne PW, Holtz RD (1988) Profiling stress history from piezocone soundings. Soils Found 28: 16–28.    
  • 13. Chen BSY, Mayne PW (1996) Statistical relationships between piezocone measurements and stress history of clays. Can Geotech J 33: 488–498.    
  • 14. Karlsrud K, Lunne T, Kort DA, et al. (2005) CPTU correlations for clays. In Proceedings of the International Conference on Soil Mechanics and Geotechnical Engineering, Balkema Publishers 16: 693.
  • 15. Mayne PW (2017) Stress History of Soils from Cone Penetration Tests. 34th Manual Rocha Lecture, Soils and Rocks 40: 203–218.
  • 16. Ching J, Phoon KK (2014) Correlations among some clay parameters-the global database. Can Geotech J 51: 663–685.    
  • 17. Leroueil S (1996) Compressibility of clays: fundamental and practical aspects. J Geotech Eng 122: 534–543.    
  • 18. Lefebvre G, Poulin C (1979) A new method of sampling in sensitive clay. Can Geotech J 16: 226–233.    
  • 19. Yang SL, Lunne T, Andersen KH, et al. (2019) Undrained shear strength of marine clays based on CPTU and SHANSEP parameters. In Proceedings of the XVII ECSMGE, Reykjavik, Iceland. In Press.
  • 20. Casagrande A (1936) The determination of the preconsolidation load and its practical significance. In Proceeding of the First International Conference on Soil Mechanics and Foundation Engineering, Cambridge, 60–64.
  • 21. Janbu N (1963) Soil compressibility as determined by oedometer and triaxial tests. In Proceeding of the European Conference on Soil Mechanics and Foundation Engineering 1: 19–25.
  • 22. Kolisoja P, Sahi K, Hartikainen J (1989) An automatic triaxial-oedometer device. In Proceedings of the 12th International Conference on Soil Mechanics and Foundation Engineering, Rio De Janeiro, 61–64.
  • 23. Schroeder K, Andersen KH, Tjok K (2006) Laboratory testing and detailed geotechnical design of the Mad Dog Anchors. Offshore Technology Conference, 17949.
  • 24. Powell JJM, Quarterman RST, Lunne T (1988) Interpretation and use of the piezocone test in UK clays. In Penetration testing in the UK: Proceedings of the Geotechnology Conference organized by the Institution of Civil Engineers, Birmingham, 151–156.
  • 25. Leroueil S, Demers D, Martel LRP, et al. (1995) Practical use of the piezocone in Eastern Canada clays. In Proceedings of the International Symposium on Cone Penetration Testing, CPT'95, Sweden: Linköping, 2: 515–522.
  • 26. Mesri G (2001) Undrained shear strength of soft clays from push cone penetration test. Géotechnique 51: 167–168.    
  • 27. Konrad JM, Law KT (1987) Preconsolidation pressure from piezocone tests in marine clays. Géotechnique 37: 177–190.    
  • 28. DeGroot DJ (2014) Evaluation of soft clay properties from interpretation of CPTU data within a SHANSEP framework. In Proceedings of the 5th International Workshop: CPTU and DMT in Soft Clays and Organic Soils, Poland: Poznan, 79–94.
  • 29. Powell JJM, Lunne T (2005) Use of CPTU data in clays/fine grained soils. Stud Geotech Mech 27: 29–66.
  • 30. L'Heureux JS, Gundersen AS, D'Ignazio M, et al. (2018) Impact of sample quality on CPTU correlations in clay–Example from the Rakkestad clay. In Cone Penetration Testing IV: Proceedings of the 4th International Symposium on Cone Penetration Testing (CPT 2018) Delft, 395–400.
  • 31. Paniagua P, D'Ignazio M, L'Heureux JS, et al. (2019) CPTU correlations for Norwegian clays: an update. AIMS Geosci 5: 82–103.    


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