Geomechanics and Engineering

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

End bearing capacity of embedded pile with inclined base plate: Field dynamic and static tests

  • Seo, Mi Jeong (School of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Han, Kyungsoo (Lyles School of Civil Engineering, Purdue University) ;
  • Park, Jong-Bae (Land and Housing Institute, Korea Land & Housing Corporation) ;
  • Jeong, Kyeong-Han (The Dream ENC) ;
  • Lee, Jong-Sub (School of Civil, Environmental and Architectural Engineering, Korea University)
  • Received : 2020.12.02
  • Accepted : 2021.08.02
  • Published : 2021.08.10
⟨ Previous Next ⟩

Abstract

The objective of this study is to investigate the effects of incorporating inclined base plates on the end bearing capacities of embedded piles by conducting dynamic pile tests and static load tests. Two types of embedded piles were prepared - conventional piles with a 50-cm-diameter flat base plate and piles with a 56-cm-diameter inclined base plate. The dynamic pile tests were conducted during pile construction, and the static load tests were conducted after curing the cement paste to investigate the end bearing capacities of the test piles. Test results indicate that the base resistances of piles with inclined base plates are greater than those of conventional piles and that the base resistances increase with an increase in the inclination angle. The increased projected area, increased contact area, extended rupture surface, and enhanced slime discharge due to the inclined base plate may result in an increase in the end bearing capacity of the pile. This study demonstrates that the end bearing capacities of the embedded piles may be maximized by incorporating inclined plates to the pile base. Thus, the pile with the inclined base plate may be effectively used for the construction of embedded piles.

Keywords

Acknowledgement

This work was supported by the Korean Small Business Innovation Research Program grant funded by the Korea Land & Housing Corporation and the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. NRF-2021R1A5A1032433).

References

  1. Acharyya, R. (2019), "Finite element investigation and ANN-based prediction of the bearing capacity of strip footings resting on sloping ground", Int. J. Geo-Eng., 10, 5. https://doi.org/10.1186/s40703-019-0100-z.
  2. ASTM D1143 (2013), Standard test methods for deep foundations under static axial compressive load, ASTM International, West Conshohocken, Pennsylvania, U.S.A.
  3. ASTM D4945 (2008), Standard test methods for high-strain dynamic testing of deep foundations, ASTM International, West Conshohocken, Pennsylvania, U.S.A.
  4. Berezantzev, B., Khrisoforov, V. and Golubkov, V. (1961), "Load bearing capacity and deformation of piled foundations", Proceedings of the 5th International Conference on Soil Mechanics and Foundation Engineering, Paris, France, July.
  5. Camp, W.M., Brown, D.A. and Mayne, P.W. (2002), "Construction method effects on axial drilled shaft performance", Proceedings of the Deep Foundations 2002: An International Perspective on Theory, Design, Construction, and Performance, Orlando, Florida, U.S.A., February.
  6. Colmenares, J.E., Kang, S.R., Shin, Y.J. and Shin, J.H. (2014), "Ultimate bearing capacity of conical shell foundations", Struct. Eng. Mech., 52(3), 507-523. http://doi.org/10.12989/sem.2014.52.3.507.
  7. Fellenius, B.H. (2002), "Determining the true distributions of load in instrumented piles", Proceedings of the Deep Foundations 2002: An International Perspective on Theory, Design, Construction, and Performance, Orlando, Florida, U.S.A., February.
  8. Fellenius, B.H. and Terceros, M.H. (2014), "Response to load for four different bored piles", Proceedings of the DFI/EFFC International Conference on Piling and Deep Foundations, Stockholm, Sweden, May.
  9. Han, K., Seo, M.J., Hong, W.T. and Lee, J.S. (2020), "End-bearing capacity of embedded piles with inclined-base plate: Laboratory model tests", J. Geotech. Geoenviron. Eng., 146(8), 04020063. https://doi.org/10.1061/(ASCE)GT.1943-5606.0002304.
  10. Hanna, A. and Abdel-Rahman, M. (1990), "Ultimate bearing capacity of triangular shell strip footings on sand", J. Geotech. Eng., 116(12), 1851-1863. https://doi.org/10.1061/(ASCE)0733-9410(1990)116:12(1851).
  11. Hanna, A. and Abdel-Rahman, M. (1998), "Experimental investigation of shell foundations on dry sand", Can. Geotech. J., 35(5), 847-857. https://doi.org/10.1139/t98-049.
  12. Ho, C.E. (2003), "Base grouted bored pile on weak granite", Proceedings of the Third International Conference on Grouting and Ground Treatment, New Orleans, Louisiana, U.S.A., February.
  13. Hong, H.S., Cho, C.W., Lee, M.W. and Lee, W.J. (1997), "Failure of precast piles installed by preboring method and the remedial measures", Proceedings of the International Conference on Foundation Failures, Singapore, August.
  14. Hong, W.P. and Chai, S.G. (2003), "The skin friction capacity of SDA (separated doughnut auger) pile", Proceedings of the Thirteenth International Offshore and Polar Engineering Conference, Honolulu, Hawaii, U.S.A., May.
  15. Huat, B.B.K., Mohammed, T.A., Abang Ali, A.A.A. and Abdullah, A.A. (2007), "Numerical and field study on triangular shell footing for low rise building", Int. J. Eng. Technol., 4(2), 194-204.
  16. Janbu, N. (1976), "Static bearing capacity of friction piles", Sechste Europaeische Konferenz fuer Bodenmechanik und Grundbau, 1(3), 1-26.
  17. Karkee, M.B. (1999), "Developments in low noise and low vibration methods of pile installation in Japan", Proceedings of the 11th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, Seoul, Korea, August.
  18. Kurian, N.P. and Devaki, J.V.M. (2005), "Analytical studies on the geotechnical performance of shell foundations", Can. Geotech. J., 42(2), 562-573. https://doi.org/10.1139/t04-110.
  19. Massarsch, K.R., Brieke, W. and Tancre, E. (1988), "Displacement auger piles with compacted base", Proceedings of the International Geotechnical Seminar on Deep Foundations on Bored and Auger Piles, Ghent, Belgium, June.
  20. Meyerhof, G.G. (1976), "Bearing capacity and settlement of pile foundations", J. Geotech. Eng. Div., 102(GT3), 197-228. https://doi.org/10.1061/AJGEB6.0000243
  21. Mohammed, W. and Austrell, P.E. (2018), "A comparative study of three onshore wind turbine foundation solutions", Comput. Geotech., 94(1), 46-57. https://doi.org/10.1016/j.compgeo.2017.08.022.
  22. Mullins, G., Winters, D. and Dapp, S. (2006), "Predicting end bearing capacity of post-grouted drilled shaft in cohesionless soils", J. Geotech. Geoenviron. Eng., 132(4), 478-487. https://doi.org/10.1061/(ASCE)1090-0241(2006)132:4(478).
  23. Neely, W.J. (1991), "Bearing capacity of auger-cast piles in sand", J. Geotech. Eng., 117(2), 331-345. https://doi.org/10.1061/(ASCE)0733-9410(1991)117:2(331).
  24. Norlund, R.L. (1963), "Bearing capacity of piles in cohesionless soils", J. Soil Mech. Found. Div., 89(3), 1-36. https://doi.org/10.1061/JSFEAQ.0000507
  25. Paik, K.H. (1997), "Characteristics of the bearing capacity for new auger-drilled piles", J. Kor. Geotech. Soc., 13(4), 25-35.
  26. Park, J.J., Jung, G.J. and Jeong, S.S. (2017), "The analysis of skin friction on small-scale prebored and precast piles considering cement milk influence", J. Kor. Geotech. Soc., 33(1), 5-15. https://doi.org/10.7843/kgs.2017.33.1.5.
  27. Pile Dynamics Inc. (2014), "CAPWAP background report Version 2014", Pile Dynamics Inc., Cleveland, Ohio, U.S.A.
  28. Roscoe, G.H. (1983), "The behavior of flight auger bored piles in sand", Proceedings of the International Conference on Advances in Piling and Ground Treatment, London, U.K., March.
  29. Seo, Y.H., Cho, S.H., Choi, D.W. and Han, B.K. (2003), "A study on the optimum design guide for auger-drilled piling", J. Kor. Soc. Civ. Eng., 51(7), 8-16.
  30. Shrivastava, A.K., Jain, D. and Vishwakarma, S. (2016), "Frictional resistance of drilling fluids as a borehole stabilizers", Int. J. Geo-Eng., 7, 12. https://doi.org/10.1186/s40703-016-0026-7.
  31. Terzaghi, K. (1943), Theoretical Soil Mechanics, Wiley, New York, U.S.A.
  32. Vesic, A.B. (1963), Bearing Capacity of Deep Foundations in Sand, Highway Research Record, Washington, D.C., U.S.A.
  33. Yoo, C.S., Kim, S.B., Heo, K.S. and Song, K.Y. (2007), "End bearing capacity of pile tip-enlarged PHC piles in weathered rock", J. Kor. Geotech. Soc., 23(1), 23-37.
  34. Zou, J.F., Yang, T. and Deng, D. (2019), "Field test of the long-term settlement for the post-grouted pile in the deep-thick soft soil", Geomech. Eng., 19(2), 115-126. http://doi.org/10.12989/gae.2019.19.2.115.