Journal of the Korean GEO-environmental Society (한국지반환경공학회 논문집)

Korean Geo-Environmental Society (한국지반환경공학회)
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Investigation of Spudcan Penetration Resistance in Layered Soil Deposits

  • Jan, Muhammad Asad (Department of Civil and Environment Engineering, Hanyang University) ;
  • Nizamani, Zubair Ahmed (Department of Civil and Environment Engineering, Hanyang University) ;
  • Park, Duhee (Department of Civil and Environment Engineering, Hanyang University)
  • Received : 2020.12.15
  • Accepted : 2020.12.22
  • Published : 2021.01.01
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Abstract

A suite of 3D large deformation finite element (FE) analyses was performed to investigate the load transfer mechanism and penetration resistance of spudcan foundations in heterogeneous soil profile consisting of sand and clay. The Elasto-Plastic models following Mohr-Coulomb and Tresca failure criteria were adopted for sand and clay, respectively. The accuracy of the numerical model was validated against centrifuge test measurements. The dense sand behavior with dilation is modeled using the non-associated flow rule. An investigation study consisting of key parameters, which includes variation in soil stratigraphy (sand-clay, sand-clay-sand), strength parameters of sand and clay (��' and su) and normalized height ratio of the sand layer (Hs/D) was conducted to assess the penetration behavior of spudcan. Based on calculated outputs, it was demonstrated that these parameters have a significant influence on the penetration resistance of spudcan. The calculated penetration resistance profiles are compared with the published (sand overlying clay) analytical model. It is confirmed that for the case of two-layer soil, the available theoretical model provides an accurate estimate of peak penetration resistance (qpeak). In the case of three-layer soil, the presence of a third stiff layer affects the penetration resistance profile due to the squeezing of the soil.

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References

  1. Achmus, M., Akdag, C. and Thieken, K. (2013), Load-bearing behavior of suction bucket foundations in sand, Applied Ocean Research 43, 157-165. https://doi.org/10.1016/j.apor.2013.09.001
  2. Bolton, M. (1986), The strength and dilatancy of sands, Geotechnique, 36(1), 65-78. https://doi.org/10.1680/geot.1986.36.1.65
  3. Craig, W. and Chua, K. (1990), Deep penetration of spud-can foundations on sand and clay. Geotechnique 40(4), 541-556. https://doi.org/10.1680/geot.1990.40.4.541
  4. Hanna, A. and Meyerhof, G.J.C.G.J. (1980), Design charts for ultimate bearing capacity of foundations on sand overlying soft clay, 17(2), 300-303. https://doi.org/10.1139/t80-030
  5. Hatanaka, M. and Uchida, A. (1996), Empirical correlation between penetration resistance and internal friction angle of sandy soils. Soils and foundations, 36(4), 1-9. https://doi.org/10.3208/sandf.36.4_1
  6. Hossain, M. (2014), Experimental investigation of spudcan penetration in multi-layer clays with interbedded sand layers, Geotechnique, 64(4), 258-276. https://doi.org/10.1680/geot.12.P.194
  7. Hu, P., Stanier, S. A., Cassidy, M. J. and Wang, D. (2014a), Predicting peak resistance of spudcan penetrating sand overlying clay, Journal of Geotechnical and Geoenvironmental Engineering, 140(2), 04013009. https://doi.org/10.1061/(ASCE)GT.1943-5606.0001016
  8. Hu, P., Wang, D., Cassidy, M. J. and Stanier, S. A. (2014b), Predicting the resistance profile of a spudcan penetrating sand overlying clay, Canadian Geotechnical Journal, 51(10), 1151-1164. https://doi.org/10.1139/cgj-2013-0374
  9. Hu, P., Wang, D., Stanier, S. A. and Cassidy, M. J. (2015), Assessing the punch-through hazard of a spudcan on sand overlying clay, Geotechnique, 65(11), 883-896. https://doi.org/10.1680/jgeot.14.P.097
  10. Lee, K., Cassidy, M. and Randolph, M. (2013), Bearing capacity on sand overlying clay soils: experimental and finite-element investigation of potential punch-through failure, Geotechnique, 63(15), 1271. https://doi.org/10.1680/geot.12.P.175
  11. Park, J.-S. and Park, D. (2017), Vertical bearing capacity of bucket foundation in sand overlying clay, Ocean Engineering, 134, 62-76. https://doi.org/10.1016/j.oceaneng.2017.02.015
  12. Qiu, G. and Grabe, J. (2012), Numerical investigation of bearing capacity due to spudcan penetration in sand overlying clay, Canadian Geotechnical Journal, 49(12), 1393-1407. https://doi.org/10.1139/t2012-085
  13. Qiu, G. and Henke, S. (2011), Controlled installation of spudcan foundations on loose sand overlying weak clay, Marine structures, 24(4), 528-550. https://doi.org/10.1016/j.marstruc.2011.06.005
  14. SNAME (2008), Guidelines for site specific assessment of mobile jack-up units, T R Bullitin 5-5A, 366.
  15. Teh, K.-L. (2007), Punch-through of spudcan foundation in sand overlying clay, Doctor of Philosophy PhD thesis, National University of Singapore, Singapore.
  16. Teh, K., Leung, C., Chow, Y. and Cassidy, M. (2010), Centrifuge model study of spudcan penetration in sand overlying clay, Geotechnique, 60(11), 825. https://doi.org/10.1680/geot.8.P.077
  17. Ullah, S. N., Stanier, S., Hu, Y. and White, D. (2017), Foundation punch-through in clay with sand: centrifuge modelling, Geotechnique, 67(10), 870-889. https://doi.org/10.1680/jgeot.16.P.100
  18. White, D., Teh, K., Leung, C. and Chow, Y. (2008), A comparison of the bearing capacity of flat and conical circular foundations on sand, Geotechnique, 58(10), 781-792. https://doi.org/10.1680/geot.2008.3781