한국지반공학회논문집 (Journal of the Korean Geotechnical Society)

  • 제36권11호
  • /
  • Pages.107-117
  • /
  • 2020
  • /
  • 1229-2427(pISSN)
  • /
  • 2288-646X(eISSN)
한국지반공학회 (Korean Geotechnical Society)
권호 표지
DOI QR코드

DOI QR Code

침하가 예측되는 지반에서 강관말뚝 주면 마찰 저항에 따른 말뚝의 거동 분석

Analysis of Pile Behaviors with Friction Resistance of Skin of Steel Pipe Pile in Ground where Settlement is Predicted

  • 이기철 (인천대학교 건설환경공학과) ;
  • 신세희 (인천대학교 건설환경공학과) ;
  • 이학린 (인천대학교 건설환경공학과) ;
  • 김동욱 (인천대학교 건설환경공학과)
  • Lee, Kicheol (Dept. of Civil and Environ, Engrg., Incheon National Univ.) ;
  • Shin, Sehee (Dept. of Civil and Environ, Engrg., Incheon National Univ.) ;
  • Lee, Haklin (Dept. of Civil and Environ, Engrg., Incheon National Univ.) ;
  • Kim, Dongwook (Dept. of Civil and Environ, Engrg., Incheon National Univ.)
  • 투고 : 2020.10.13
  • 심사 : 2020.11.05
  • 발행 : 2020.11.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

개단 강관말뚝의 경우 일반적으로 말뚝에 작용하는 외부 주면 마찰력뿐만 아니라 설치과정에서 폐색된 흙이 강관 내부에 작용하는 내부 마찰저항이 존재한다. 내·외부 저항에 따라 극한하중의 변화가 예상되며, 말뚝이 시공된 지반이 점성토일 경우 지반 침하로 유발되는 부주면 마찰력에도 영향을 끼칠 것으로 판단된다. 따라서 본 연구에서는 강관말뚝 내·외부 저항 특성에 따른 거동을 수치해석적으로 분석하고자 하며, 지반 침하 발생 전·후의 마찰력 분포, 축력, 침하량을 산정하였다. 해석 결과, 내부 마찰 저항은 외부 마찰 저항보다 적은 영향을 미쳤지만 전체적인 말뚝 거동에 끼치는 영향을 고려하였을 때, 중요한 요소 중 하나이며 설계 시 두 가지 저항요소를 고려할 필요가 있을 것으로 판단된다.

Open-ended steel pipe piles have outside frictional force and inside frictional resistance in which blocked soil acts on the inside of the steel pipe during installation. It is expected that the ultimate load will change depending on the inside and outside resistance. And, if the ground on which the piles were constructed is clay soil, it is predicted that it will have effect on the negative skin friction caused by the ground settlement. Therefore, in this study, the behavior according to the inside and outside resistance characteristics of steel pipe piles was analyzed numerically, and the frictional force distribution, axial load and settlements before and after the occurrence of ground settlement were calculated. As a result of the analysis, the inside frictional resistance had less influence than the outside frictional resistance. However, inside frictional resistance is considered to be one of the important factors considering the effect on the overall pile behavior, and both resistance factors need to be considered in the design process.

키워드

참고문헌

  1. Auvinet, G. and Hanell, J.J. (1981), "Negative Skin Friction on Piles in Mexico City Clay", Proc 10th ICSMFE, Stockholm. pp. 599-604.
  2. Bakholdin, B.V. and Berman, V.I. (1975), "Investigation of Negative Skin Friction on Piles and Suggestions on its Calculations", Journal of Soil Mech. and Foundation Ena., Vol.2, No.4, pp.238-244.
  3. Brand, E.W. and Luangdilok, N. (1975), "A Long Term Foundation Failure Caused by Dragdown on Piles", Proc., 4th Southeast Asian Conf. on Soil Engrg., Kuala Lumpur.
  4. Briaud, J.L. and Tucker, L. (1997), "Design and Construction Guidelines for Downdrag on Uncoated and Bitumen-coated Piles", National Academy Press, No.1458, Washington, U.S.
  5. Chellis, R.D. (1961), "Pile Foundations", Mcgraw Hill Book co, New York, U.S.
  6. Chen, R.P., Zhou, W.H., and Chen, Y.M. (2009), "Influences of Soil Consolidation and Pile Load on the Development of Negative Skin Friction of a Pile", Computers and Geotechnics, Vol.36, No.8, pp.1265-1271. https://doi.org/10.1016/j.compgeo.2009.05.011
  7. Davisson, M.T. (1972), "High Capacity Piles", Proc. Lecture Series on Innovations in Foundation Construction, ASCE, Illinois Section.
  8. Endo, M., Minou, A., Kawasaki, and Shibata, T. (1969), "Negative Skin Friction Acting on Steel Pipe Pile in Clay", 7th Int. Conf. on Soil Mech. and Found. Eng., Mexico City, pp.85-92.
  9. Hejazi, Y., Dias, D., and Kastner, R. (2008), "Impact of Constitutive Models on the Numerical Analysis of Underground Constructions", Acta Geotechnica, Vol.3, No.4, pp.251-258. https://doi.org/10.1007/s11440-008-0056-1
  10. Jeong, S.S. and Ko, J. Y. (2016), "Influence Factors on the Degree of Soil Plugging for Open-Ended Piles", Journal of the Korean Geotechnical Society, Vol.32, No.5, pp.27-36 (in Korean). https://doi.org/10.7843/kgs.2016.32.5.27
  11. Johannessen, I.J. and Bjerrum, L. (1965), "Measurements of the Compression of a Steel Pile to Rock due to Settlement of the Surrounding Clay", Proc., 6th Int. Conf. on Soil Mech. and Found. Eng., pp.261-264.
  12. Kim, D., Jeong, S., and Park, J. (2020), "Analysis on Shaft Resistance of the Steel Pipe Prebored and Precast Piles based on Field Load-transfer Curves and Finite Element Method", Soils and Foundations, Vol.60, No.2, pp.478-495. https://doi.org/10.1016/j.sandf.2020.03.011
  13. Kuwabara, F. and Poulos, H.G. (1989), "Downdrag Forces in Group of Piles", ASCE, Vol.115, No.6, pp.806-814.
  14. Lambe, T.W., Garianger, J.E., and Leifer, S.A. (1974), "Prediction and Field Evaluation of Downdrag Forces on a Single Pile", Research Report, No. R74-27, Massachusetts Institute of Technology, Cambridge, U.S.
  15. Lim, J.S., Park, J.H., and Sim J.S. (2010), "A Study on the Negative Skin Friction Depending Upon the Locations of Piles in a Group Using Model Test", KGS Spring National Conference 2010. Seoul. (in Korean).
  16. Rollins, K. (2019), "Proposed AASHTO specification for design of piles for downdrag", NCHRP12-116, Brigham Young University, Utah, U.S.
  17. SIMULIA (2014), "6.14 Documentation collection", ABAQUS/CAE User' Manual.
  18. Tan, S.A. and Fellenius, B.H. (2016), Negative Skin Friction Pile Concepts with Soil-structure Interaction, Geotechnical Research, Vol.3, No.4, pp.137-147. https://doi.org/10.1680/jgere.16.00006
  19. Terzaghi, K. (1942), "Discussion of the Progress Report of the Committee on the Bearing Value of Pile Foundations", In Proceedings ASCE, Vol.68, pp.311-323.
  20. Walker, L.K., Darvall, L., and Le, P. (1973), "Dragdown on Coated and Uncoated Piles", 8th Int. Conf. on Soil Mech. and Found. Eng., Moscow, pp.257-262.