DOI QR코드

DOI QR Code

Numerical Study on the Effect of Steel Pipe Specification on Pile Behaviour

강관말뚝의 제원이 말뚝거동에 미치는 영향에 관한 수치해석 연구

  • Park, Jeong-Jun (Incheon Disaster Prevention Research Center, Incheon Natl. Univ.) ;
  • Lee, Kwang-Wu (Geotechnical Engrg. Research Institute, Korea Institute of Civil Engrg. and building Technology) ;
  • You, Seung-Kyong (Dept. of Civil Engrg., Myongji College) ;
  • Hong, Gigwon (Institute of Technology Research and Development, Korea Engrg. & Construction)
  • 박정준 (인천대학교 방재연구센터) ;
  • 이광우 (한국건설기술연구원 지반연구소) ;
  • 유승경 (명지전문대학 토목과) ;
  • 홍기권 ((주)대한건설ENG 기술연구소)
  • Received : 2017.05.17
  • Accepted : 2017.05.24
  • Published : 2017.05.31

Abstract

In this study, three dimensional numerical analyses were carried out to predict axial (pullout and compressive) and lateral behavior of rock-socketed steel pipe pile varying diameter, wall thickness, and length. As a result of the pile pullout analyses, it was confirmed that the pullout displacement was inversely proportional to the pile diameter for given pile length, thickness, pullout load. Load-settlement relationship of the compressive pile analyses revealed that the effect of pile thickness on pile resistance was more significant than that of pile diameter. In addition, laterally loaded pile analyses showed that pile lateral resistance is influenced above all else by pile diameter. This study showed that it is necessary to conduct numerical analyses to identify the effects of pile diameter, wall thickness, and pile length on the steel pipe pile behavior as a preliminary pile design under specified loading conditions.

본 연구에서는 특정 암반에 근입된 강관말뚝의 거동특성을 분석하기 위하여, 강관말뚝의 직경, 두께 및 길이 조건에 따른 인발, 압축 및 수평재하 시의 시험결과 예측을 위한 3차원 수치해석 연구를 수행하였다. 먼저, 인발재하에 대한 거동특성을 분석한 결과, 동일한 말뚝길이 및 두께와 인발하중 크기를 기준으로 말뚝직경에 반비례하는 인발변위가 나타나는 것으로 확인되었다. 또한 압축재하에 따른 하중-침하 관계를 통하여, 말뚝 직경에 비하여 말뚝의 두께가 하중저항에 대한 효과에 더욱 큰 영향을 미치는 것으로 분석되었으며, 수평하중 재하에 따른 수평변위 관계를 바탕으로 수평하중의 저항효과는 말뚝직경에 의한 영향이 큰 것으로 분석되었다. 따라서 강관말뚝을 이용하여 기초구조물 설계에 따른 재하시험을 위해서는 예비설계 단계에서 말뚝 조건이 거동특성에 미치는 영향을 분석할 필요가 있는 것으로 확인되었다.

Keywords

References

  1. Cho, J. Y., Lee, S. J., and Jeong, S. S. (2010), "A Study on the Optimum Design of Piled-raft Foundation Considering Pile Condition", Journal of the Korean Geotechnical Society, Vol.26, No.12, pp.31-40 (in Korean).
  2. Choi, Y. K. (1999), "Suggestions for Improvement of Domestic Pile Foundation Design Routine - At a Viewpoint of Pile Bearing Capacity", Journal of the Korean Society of Civil Engineers, Vol.19, No.III-3, pp.467-477 (in Korean).
  3. Kim, Y. H. and Jeong, S. S. (2010), "Analysis of Soil Resistance on Laterally Loaded Piles Considering Soil Continuity", Journal of the Korean Society of Civil Engineers, Vol.30, No.4C, pp.175-183 (in Korean).
  4. Kwon, O. (2015), "Bearing Behavior Characteristics of Pressure Penetrating Steel Pipe Pile Under Compression Load", Journal of the Korean Geo-Environmental Society, Vol.16, No.7, pp.5-13 (in Korean)
  5. Lee, J. H., Lee, S. H., and Kim, S. R. (2013), "Horizontal Bearing Behavior of Group Suction Piles by Numerical Analysis", Journal of the Korean Geotechnical Society, Vol.29, No.11, pp.119-127 (in Korean). https://doi.org/10.7843/kgs.2013.29.11.119
  6. Lee, S. H. (2013), "Numerical Analyses on Moment Resisting Behaviors of Electric Pole Foundations According to Their Shapes", Journal of the Korean Geotechnical Society, Vol.29, No.11, pp. 85-97 (in Korean). https://doi.org/10.7843/kgs.2013.29.11.85
  7. Na, S. M., Yeo, G. Y., and An, D. W. (2010), "Present and Future of Technology Development in the Field of Pile Foundation Using High Performance Steel Pipe", Seminar on design & construction for improved steel pile, KGS, pp.2-9 (in Korean).
  8. Yang, K. H., Huh, J. C., and Park J. J. (2015), "A Study on p-y Curves with Pressuremeter Tests in Jeju Basalt Rock", Journal of the Korean Geosynthetics Society, Vol.14, No.4, pp.129-137 (in Korean) https://doi.org/10.12814/jkgss.2015.14.4.129
  9. Yun, J. M., Yea, G. G., Kim, H. Y., Kim, D. M., and Kim, S. L. (2016), "Comparison of Construction Costs for Bridge Foundation with Optimization of Steel and PHC Embedded Piles", Journal of the Korean Geosynthetics Society, Vol.15, No.4, pp.71-78 (in Korean).