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An experimental procedure for evaluating the consolidation state of marine clay deposits using shear wave velocity

  • Chang, Ilhan (Department of Civil and Environmental Engineering, KAIST) ;
  • Kwon, Tae-Hyuk (Earth Sciences Division, Lawrence Berkeley National Laboratory) ;
  • Cho, Gye-Chun (Department of Civil and Environmental Engineering, KAIST)
  • Received : 2010.07.01
  • Accepted : 2010.09.01
  • Published : 2011.04.25
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Abstract

In marine clay deposits, naturally formed or artificially reclaimed, the evaluation and monitoring of the consolidation process has been a critical issue in civil engineering practices due to the time frame required for completing the consolidation process, which range from several days to several years. While complementing the conventional iconographic method suggested by Casagrande and recently developed in-situ techniques that measure the shear wave, this study suggests an alternative experimental procedure that can be used to evaluate the consolidation state of marine clay deposits using the shear wave velocity. A laboratory consolidation testing apparatus was implemented with bimorph-type piezoelectric bender elements to determine the effective stress-shear wave velocity (${\sigma}^{\prime}-V_s$) relationship with the marine clays of interest. The in-situ consolidation state was then evaluated by comparing the in-situ shear wave velocity data with the effective stress-shear wave velocity relationships obtained from laboratory experiments. The suggested methodology was applied and verified at three different sites in South Korea, i.e., a foreshore site in Incheon, a submarine deposit in Busan, and an estuary delta deposit in Busan. It is found that the shear wave-based experimental procedure presented in this paper can be effectively and reliably used to evaluate the consolidation state of marine clay deposits.

Keywords

Acknowledgement

Supported by : National Research Foundation of Korea (NRF)

References

  1. Abuhejleh, A.N. and Znidarcic, D. (1995), "Desiccation theory for soft cohesive soils", J. Geotech. Eng., 121(6), 493-502. https://doi.org/10.1061/(ASCE)0733-9410(1995)121:6(493)
  2. Arroyo, M., Wood, D.M., Greening, P.D., Medina, L. and Rio, J. (2006), "Effects of sample size on bender-based axial G(0) measurements", Geotechnique, 56(1), 39-52. https://doi.org/10.1680/geot.2006.56.1.39
  3. Buchan, S. and Smith, D.T. (1999), "Deep-sea sediment compression curves: Some controlling factors, spurious overconsolidation, predictions, and geophysical reproduction", Mar. Georesour. Geotech., 17(1), 65-81. https://doi.org/10.1080/106411999274016
  4. Casagrande, A. (1936), "Determination of the preconsolidation load and its practical significance", Proceedings of the 1st International Conference on Soil Mechanics and Foundation Engineering, Cambridge, MS.
  5. Chang, I. and Cho, G.C. (2010), "A new alternative for estimation of geotechnical engineering parameters in reclaimed clays by using shear wave velocity", Geotech. Test. J., 33(3), 171-182.
  6. Elsworth, D., Lee, D.S., Hryciw, R. and Shin, S. (2006), "Pore pressure response following undrained uCPT sounding in a dilating soil", J. Geotech. Geoenviron., 132(11), 1485-1495. https://doi.org/10.1061/(ASCE)1090-0241(2006)132:11(1485)
  7. Elsworth, D. and Lee, D.S. (2007), "Limits in determining permeability from on-the-fly uCPT sounding", Geotechnique, 57(8), 679-685. https://doi.org/10.1680/geot.2007.57.8.679
  8. Hardin, B.O. and Richart, F.E. (1963), "Elastic wave velocities in granular soils", J. Soil Mech. Found., 89(SM1), 33-65.
  9. Jovicic, V., Coop, M.R. and Simic, M. (1996), "Objective criteria for determining G(max) from bender element tests", Geotechnique, 46(2), 357-362. https://doi.org/10.1680/geot.1996.46.2.357
  10. Kawaguchi, T., Mitachi, T. and Shibuya, S. (2001), "Evaluation of shear wave travel time in laboratory bender element test", Proceedings of the 15th International Conference on Soil Mechanics and Geotechnical Engineering, ISCGME.
  11. Khan, P.A., Madhav, M.R. and Reddy, E.S. (2010), "Consolidation of thick clay layer by radial flow - non-linear theory", Geomech. Eng., 2(2), 157-160. https://doi.org/10.12989/gae.2010.2.2.157
  12. Klein, K. and Santamarina, J.C. (2003), "Monitoring sedimentation of a clay slurry", Geotechnique, 53(3), 370-372. https://doi.org/10.1680/geot.2003.53.3.370
  13. Kwon, T.H. and Cho, G.C. (2005), "Smart geophysical characterization of particulate materials in a laboratory", Smart Struct. Syst., 1(2), 217-233. https://doi.org/10.12989/sss.2005.1.2.217
  14. Landon, M.M., DeGroot, D.J. and Sheahan, T.C. (2007), "Nondestructive sample quality assessment of a soft clay using shear wave velocity", J. Geotech. Geoenviron., 133(4), 424-432. https://doi.org/10.1061/(ASCE)1090-0241(2007)133:4(424)
  15. Lee, J.S. and Santamarina, J.C. (2005), "Bender elements: performance and signal interpretation", J. Geotech. Geoenviron., 131(9), 1063-1070. https://doi.org/10.1061/(ASCE)1090-0241(2005)131:9(1063)
  16. Lee, J., Kim, M. and Lee, S.H. (2009), "Reliability analysis and evaluation of LRFD resistance factors for CPT-based design of driven piles", Geomech. Eng., 1(1), 17-34. https://doi.org/10.12989/gae.2009.1.1.017
  17. Leong, E.C., Yeo, S.H. and Rahardjo, H. (2005), "Measuring shear wave velocity using bender elements",Geotech. Test. J., 28(5), 488-498.
  18. Lu, Y., Ye, L., Wang, D., Zhou, L. and Cheng, L. (2010), "Piezo-activated guided wave propagation and interaction with damage in tubular structures", Smart Struct. Syst., 6(7), 835-849. https://doi.org/10.12989/sss.2010.6.7.835
  19. Lunne, T., Robertson, P.K. and Powell, J.J.M. (1997), "Cone penetration testing in geotechnical practice", Blackie Academic & Professional, London.
  20. Ninjgarav, E., Chung, S.G., Jang, W.Y. and Ryu, C.K. (2007), "Pore size distribution of pusan clay measured by mercury intrusion porosimetry", J. Civil Eng., 11(3), 133-139.
  21. Pennington, D.S., Nash, D.F.T. and Lings, M.L. (2001), "Horizontally mounted bender elements for measuring anisotropic shear moduli in triaxial clay specimens", Geotech. Test. J., 24(2), 133-144. https://doi.org/10.1520/GTJ11333J
  22. Richards, A.F. (1988), Vane shear strength testing in soils: field and laboratory studies, ASTM, Philadelphia.
  23. Santamarina, J.C., Klein, K.A. and Fam, M.A. (2001), "Soils and waves", Wiley, Chichester.
  24. Shang, J.Q., Tang, Q.H. and Xu, Y.Q. (2009), "Consolidation of marine clay using electrical vertical drains", Geomech. Eng., 1(4), 275-289. https://doi.org/10.12989/gae.2009.1.4.275
  25. Tint, K., Kim, Y., Seo, I.S. and Kim, D.M. (2007), "Shear behavior of overconsolidated Nakdong river sandy silt", J. Civil Eng., 11(5), 233-241.

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