Advertisement

Effect of helix bending deflection on load settlement behaviour of screw pile

  • Adnan Anwar MalikEmail author
  • Jiro Kuwano
  • Shinya Tachibana
  • Tadashi Maejima
Research Paper

Abstract

A screw pile has higher end bearing capacity than any other straight pipe piles due to its larger helix with respect to central shaft. However, larger helices are not frequently used as it will bend and may reduce the actual bearing capacity of the ground. In the present study, the effect of helix bending deflection on the load settlement behaviour and ultimate bearing capacity is investigated. To achieve the objectives, model scale pile load tests were conducted. The effect of helix bending on the load settlement behaviour at higher stress level was also investigated in this research. The helices with different helix-to-shaft-diameter ratios and thicknesses were used, so that clear difference of deformed and non-deformed screw piles in the load settlement behaviour can be observed. Dry Toyoura sand in dense state was used as a model ground. It is observed from test results that the helix bending deflection starts affecting the load settlement behaviour of the ground if it is more than the critical helix bending deflection. The ratio of critical helix bending deflection to outstand length decreases with increase in helix-to-shaft-diameter ratio, and its relationship is presented in this study. It is also observed that the Roark’s formula for flat circular plate having uniform load over a very small circular area with fixed outer edges showed good agreement with the measured helix bending deflection. In order to estimate the optimum helix thickness, the well-agreed equation is also modified with respect to critical helix bending deflection.

Keywords

Helix bending deflection Load settlement behaviour Pile load test Screw pile 

Notes

Acknowledgements

The first author acknowledges the Ministry of Education, Culture, Sports, Science and Technology (Monbukagakusho) of Japan for its support by providing the scholarship for this research.

References

  1. 1.
    Adams PA (2011) Helical pile application and design. Ph.D. Engineer, LLC, pp 1–15Google Scholar
  2. 2.
    Bobbitt DE, Clemence SP (1987) Helical anchors: application and design criteria. In: Proceedings of 9th Southeast Asian geotechnical conference, Bangkok, Thailand, vol 6, pp 105–120Google Scholar
  3. 3.
    Clayton DJ (2005) Basic helical screw pile design. ECP Torque Anchor Brand of Helical Screw Piles, Earth Contact Products, pp 1–28Google Scholar
  4. 4.
    Elsherbiny ZH, El Nagar MH (2013) Axial compressive capacity of helical piles from field tests and numerical study. Can Geotech J 50(12):1191–1203.  https://doi.org/10.1139/cgj-2012-0487 Google Scholar
  5. 5.
    Garnier J, Gaudin C, Springman S, Cullingan SM, Goodings D, Konig D, Kutter B, Phillips R, Randloph MF, Thorel L (2007) Catalogue scaling laws and similitude questions in geotechnical centrifuge modeling. Int J Phys Model Geotech 3:1–24Google Scholar
  6. 6.
    Ghaly A, Hanna A, Hanna M (1991) Installation torque of screw anchors in dry sand. Soils Found 31(2):77–92Google Scholar
  7. 7.
    Hoyt RM, Clemence SP (1989) Uplift capacity of helical anchors in soil. In: Proceedings of the 12th international conference on soil mechanics and foundation engineering, vol 2. Rio de Janerio, Brazil, pp 1019–1022Google Scholar
  8. 8.
    Janssen H (1895) Versuche uber Getreidedruvk in Silozellen. Ver Stsch Ing 39:1045–1049Google Scholar
  9. 9.
    Jaky J (1948) Earth pressure in silos. In: Proceedings of 2nd international conference on soil mechanics and foundation engineering, vol 1. Rotterdam, Netherlands, pp 103–107Google Scholar
  10. 10.
    Kishida H (1963) Stress distribution of model piles in sand. Soils Found 4(1):1–23Google Scholar
  11. 11.
    Lanyi-Bennet SA, Deng L (2018) Axial load testing of helical pile groups in glaciolacustrine clay. Can Geotech J.  https://doi.org/10.1139/cgj-2017-0425 Google Scholar
  12. 12.
    Li W, Deng L (2018) Axial load tests and numerical modeling of single-helix piles in cohesive and cohesionless soils. Acta Geotechnica.  https://doi.org/10.1007/s11440-018-0669-y Google Scholar
  13. 13.
    Malik AA, Kuwano J, Maejima T (2013) The effect of helix/wing plate deformation on end bearing resistance of screw piles. In: Proceedings of 38th annual conference on deep foundations, Pheonix, USA, pp 505–510Google Scholar
  14. 14.
    Malik AA, Kuwano J, Maejima T (2015) Helix deflection effect on load settlement behavior of pile with increasing stress level. In: Proceedings of 40th annual conference on deep foundations, Oakland, USAGoogle Scholar
  15. 15.
    Malik AA, Kuwnao J, Tachibana S, Maejima T (2016) Interpretation of screw pile load test data using extrapolation method in dense sand. Int J GEOMATE 10(1):1567–1574.  https://doi.org/10.21660/2016.19.29262 Google Scholar
  16. 16.
    Malik AA, Kuwnao J, Tachibana S, Maejima T (2017) End bearing capacity comparison of screw pile with straight pipe pile under similar ground conditions. Acta Geotech 12(2):415–428.  https://doi.org/10.1007/s11440-016-0482-4 Google Scholar
  17. 17.
    Meyerhof GG, Adams JI (1968) The ultimate uplift capacity of foundations. Can Geotech J 4:225–244Google Scholar
  18. 18.
    Mitsch MP, Clemence SP (1985) The uplift capacity of helix anchors in sand. In: Proceedings of ASCE. New York, pp 26–47Google Scholar
  19. 19.
    Narasimha RS, Prasad S, Shetty MD, Joshi VV (1989) Uplift capacity of screw pile anchors. Geotech Eng 20(2):139–159Google Scholar
  20. 20.
    Narasimha RS, Prasad YVSN (1993) Estimation of uplift capacity of helical piles in clays. J Geotech Eng 119(2):352–357Google Scholar
  21. 21.
    Nabizadeh F, Choobbasti AJ (2017) Field study of capacity helical piles in sand and silty clay. Transp Infrastruct Geotechnol 4(1):3–17.  https://doi.org/10.1007/s40515-016-0036-0 Google Scholar
  22. 22.
    Perko HA (2009) Helical piles: a practical guide to design and installation. Wiley, New JerseyGoogle Scholar
  23. 23.
    Pipatpongsa T, Heng S (2010) Granular arch shapes in storage silo determined by quasi-static analysis under uniform vertical pressure. J Solid Mech Mater Eng 4(8):1237–1248.  https://doi.org/10.1299/jmmp.4.1237 Google Scholar
  24. 24.
    Rakotonindriana MHJ, Kouby AL, Buttigieg S, Derkx F, Thorel L, Garnier J (2010) Design of an instrumented model pile for axial cyclic loading. In: Springman S, Laue J, Seward L (eds) Physical modeling in geotechnics. Taylor & Francis Group, London, pp 991–996Google Scholar
  25. 25.
    Randolph MF, Worth CF (1978) Analysis of deformation of vertical loaded piles. J Geotech Eng Div 104(12):1465–1488Google Scholar
  26. 26.
    Robinsky EI, Morrison CF (1964) Sand displacement and compaction around model friction piles. Can Geotech J 1(2):81–93Google Scholar
  27. 27.
    Sakr M (2009) Performance of helical piles in oil sand. Can Geotech J 46(9):1046–1061Google Scholar
  28. 28.
    Sakr M (2010) High capacity helical piles—a new dimension for bridge foundations. In: Proceedings of 8th international conference on short and medium span bridges, Niagara Falls, Canada, pp 142.1–142.11Google Scholar
  29. 29.
    Sakr M (2011) Installation and performance characteristics of high capacity helical piles in cohesionless soils. DFI J 5(1):39–57Google Scholar
  30. 30.
    Sakr M (2014) Relationship between installation torque and axial capacities of helical piles in cohesionless soils. Can Geotech J 52(6):747–759.  https://doi.org/10.1139/cgj-2013-0395 Google Scholar
  31. 31.
    Santos TC, Tsuha CHC, Giacheti HL (2013) The use of CPT to evaluate the effect of helical pile installation in tropical soils. In: Coutinho RQ, Mayne PW (eds) Geotechnical and geological site characterization 4. Taylor and Francis Group, London, pp 1079–1084Google Scholar
  32. 32.
    Tsuha CHC, Aoki N (2010) Relationship between installation torque and uplift capacity of deep helical piles in sand. Can Geotech J 47(6):635–647.  https://doi.org/10.1139/T09-128 Google Scholar
  33. 33.
    Vesic AS (1971) Breakout resistance of objects embedded in ocean bottom. J Soil Mech Found Division 97(9):1183–1205Google Scholar
  34. 34.
    Wark C (2010) A structural analysis of the welded connection between helix plate and tubular pile shaft on steel helical piles. M.Sc. thesis, Imperial College London, LondonGoogle Scholar
  35. 35.
    Widisinghe S, Sivakugan N (2014) Vertical stresses within granular materials in containments. Int J Geotech Eng 8(4):431–435.  https://doi.org/10.1179/1939787913Y.0000000031 Google Scholar
  36. 36.
    Yang J (2006) Influence zone of end bearing piles in sand. J Geotech Geoenviron Eng 132(9):1229–1237Google Scholar
  37. 37.
    Young WC, Budynas RG (2002) Roark’s formulas for stress and strain. McGraw-Hill Companies Inc, Two Penn PlazaGoogle Scholar
  38. 38.
    Yttrup PJ, Abramsson G (2003) Ultimate strength of steel screw piles in sand. Aust Geomech 38(1):17–27Google Scholar
  39. 39.
    Yu F, Yang J (2012) Bearing capacity of open-ended steel pipe piles in sand. J Geotech Geoenviron Eng 138(9):1116–1128Google Scholar

Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Adnan Anwar Malik
    • 1
    Email author
  • Jiro Kuwano
    • 1
  • Shinya Tachibana
    • 2
  • Tadashi Maejima
    • 3
  1. 1.Graduate School of Science and EngineeringSaitama UniversitySaitama-shiJapan
  2. 2.Research Center for Urban Safety and SecurityKobe UniversityKobeJapan
  3. 3.Asahikasei Kenzai CompanyChiyodaJapan

Personalised recommendations