Behavior of large piled raft foundation on different soil profiles for different loadings and different pile raft configurations

Abstract

In the present study, 3D numerical model is employed to understand the settlement, load-sharing, bending moment and shear force behavior of large piled rafts, founded on homogeneous soil profile and varying soil profile for different load configurations and different piled raft configurations (PRC). Thus, the effect of pile spacing and number of piles are studied. Results of study show that as the pile spacing increases, average settlement decreases significantly for varying soil profile as that of homogeneous soil profile and it is noted to be lesser for uniform PRC. For any soil profile, with an increase in pile spacing differential settlement increases and is observed to be lesser in ‘V’-shaped PRC. Further, load-sharing ratio increases with increases in pile spacing and is noted to be maximum in ‘W’-shaped PRC. It is observed to be more for varying soil profile and equivalent point loads as compared to homogeneous soil profile and uniformly distributed load, respectively. Maximum bending moment and maximum shear force are noted to be lesser for varying soil profile and homogeneous soil profile, respectively. It is observed to be lesser in ‘V’-shaped PRC.

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References

  1. 1.

    Franke E, El-Mossallamy Y, Wittmann P (2000) Calculation methods for raft foundation in Germany. In: Hemsley JA (ed) Design applications of raft foundation. Thomas Telford, London, pp 283–322

    Google Scholar 

  2. 2.

    Burland J (1977) Piles as settlement reducers. In: Proceedings on 19th National Italian geotechnical conference Padova, Italy, vol 2, pp 21–34

  3. 3.

    Viggiani C. (2001) Analysis and design of piled raft foundations. First Arrigo Croce Lecture, Rivista Italiana Di Geotechnica, pp 47–75

  4. 4.

    Mandolini A, Di Laora R, Mascarucci Y (2013) Rational design of piled raft. Procedia Eng 57:45–52

    Article  Google Scholar 

  5. 5.

    El-Mossallamy Y, Lutz B, Richter Th (2006) Innovative application and design of piled raft foundation. In: 10th international conference on piling and deep foundations, Amsterdam, Netherlands

  6. 6.

    Nguyen DDC, Kim DS, Jo SB (2013) Settlement of piled rafts with different pile arrangement schemes via centrifuge tests. J Geotech Geoenviron Eng 139:690–1698

    Google Scholar 

  7. 7.

    Akl AY, Mansour MH, Moustafa HK (2014) Effect of changing configurations and lengths of piles on piled raft foundation behaviour. Civ Eng Urban Plan 1(1):49–65

    Google Scholar 

  8. 8.

    Mali S, Singh B (2018) Behavior of large piled–raft foundation on clay soil. Ocean Eng 149:205–216

    Article  Google Scholar 

  9. 9.

    Cho J, Lee JH, Jeong SS, Lee J (2012) The settlement behavior of piled raft in clay soils. Ocean Eng 53:153–163

    Article  Google Scholar 

  10. 10.

    Poulos HG, Devdas AJ (2005) Foundation design for the Emirates twin towers, Dubai. Can Geotech J 42:716–730

    Article  Google Scholar 

  11. 11.

    Poulos HG, Bunce G (2008) Foundation design for the Burj Dubai: The world tallest building. In: Proceedings on the sixth international conference on case histories in geotechnical engineering, Arlinton, VA, pp 11–16

  12. 12.

    Poulos HG, Small JC, Chow HSW (2011) Piled raft foundation for tall buildings. Geotech Eng J SEAGS AGSSEA 42:78–84

    Google Scholar 

  13. 13.

    Rabiei M, Choobbasti AJ (2016) Piled raft design strategies for high rise buildings. Geotech Geol Eng 34(1):75–85

    Article  Google Scholar 

  14. 14.

    Reul O (2004) Numerical study of the bearing behavior of piled rafts. Int J Geomech 4:59–68

    Article  Google Scholar 

  15. 15.

    Sanctis LD, Mandolini A (2006) Bearing capacity of the piled rafts on soft clays. J Geotech Geoenviron Eng 132:1600–1610

    Article  Google Scholar 

  16. 16.

    Chow HSW, Small JC (2005) Behaviour of piled rafts with piles of different lengths and diameters under vertical loading. Adv Deep Found. https://doi.org/10.1061/40778(157)20

  17. 17.

    Brinkgreve R, Swolfs W, Engin E (2015) PLAXIS user’s manual, version 6.1, Balkema, Rotterdam, The Netherlands

  18. 18.

    Gandhi SR, Maharaj DK (1995) Behavior of piled raft under uniform loading. In: Proceedings on Indian geotechnical conference (IGC-95), Bangalore, vol 1, pp 169–172

  19. 19.

    Tran TV, Teramoto S, Kimura M, Boonyatee T, Vinh LB (2012) Effect of ground subsidence on load sharing and settlement of raft and piled raft foundations. Stress 1:N3

    Google Scholar 

  20. 20.

    Sheil B (2017) Numerical simulations of the reuse of piled raft foundations in clay. Acta Geotech 12(5):1–13

    Article  Google Scholar 

  21. 21.

    Jeong S, Lee J, Lee CJ (2004) Slip effect at the pile-soil interface on dragload. Comput Geotech 31(2):115–126

    Article  Google Scholar 

  22. 22.

    Sinha A, Hanna AM (2016) 3D Numerical model for piled raft foundation. Int J Geomech 17(2). https://doi.org/10.1061/(asce)gm.19435622.0000674

  23. 23.

    Ranjan G, Rao ASR (2007) Basic and applied soil mechanics. New Age International, Chennai

    Google Scholar 

  24. 24.

    Reul O, Randolph MF (2004) Design strategies for piled rafts subjected to nonuniform vertical loading. J Geotech Geoenviron Eng 130:1–13

    Article  Google Scholar 

  25. 25.

    Liew SS, Gue SS, Tan YC (2002) Design and instrumentation results of a reinforcement concrete piled raft supporting 2500 ton oil storage tank on very soft alluvium deposits. In: Ninth international conference on piling and deep foundations, Nice, 3rd–5th June

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Correspondence to Shivanand Mali.

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Mali, S., Singh, B. Behavior of large piled raft foundation on different soil profiles for different loadings and different pile raft configurations. Innov. Infrastruct. Solut. 4, 8 (2019). https://doi.org/10.1007/s41062-018-0193-9

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Keywords

  • Piled raft
  • Numerical modeling
  • Clay
  • Load configurations
  • Piled raft configurations