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Analysis of Skin Friction Behavior in Prebored and Precast Piles Based on Field Loading Test

재하시험을 통한 매입말뚝의 주면마찰력 거동 분석

Gyung-Ja Jung1
,
Do-Hyun Kim2
,
Chul-Ju Lee3
,
Sang-Seom Jeong4*
정 경자1
,
김 도현2
,
이 철주3
,
정 상섬4*
1Deputy Principal Researcher, Korea Expressway Corporation Research Institute
2Graduate Student, Dept. of Civil and Environment Engrg., Yonsei Univ.
3Prof., Dept. of Civil Engrg., Kangwon Univ.
4Prof., Dept. of Civil and Environmental Engrg., Yonsei Univ.
1한국도로공사 도로교통연구원 책임연구원
2연세대학교 토목환경공학과 박사과정
3강원대학교 토목공학과 교수
4연세대학교 토목환경공학과 교수
*교신저자. *Corresponding Author. 
31 January 2017. pp. 31-38
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Abstract

Skin friction of prebored and precast pile may be one of the most critical factors affecting the bearing capacity and settlement. Special attention was given to the interface behavior of pile-cement milk-surrounding soil when the load is acting on the prebored and precast pile. The cases of single pile were analyzed through a three-dimensional finite element approach and pile loading tests. A series of numerical analyses of the interface of pile-cement milk-soil was conducted with the proposed t-z curve and field measurements. It is shown that the use of cement milk around the pile increases the skin friction and reduces the pile settlement. It is also known that the suggested t-z curve between the cement milk and the soil, enhances the accuracy of the numerical analysis results.

Keywords
Prebored and precast pile
Finite element method
Interface modeling
Load-settlement curve
t-z curve

본 연구에서는 매입말뚝의 지지력과 침하에 큰 영향을 미치는 시멘트풀과 지반 사이의 주면 인터페이스 및 영향인자에 따른 거동을 분석하였다. 시멘트풀과 지반 사이의 인터페이스를 고려하기 위한 User-defined 모델을 적용하였고, 현장 시험 결과와의 검증을 바탕으로 매입말뚝 거동을 고려한 새로운 t-z 곡선을 제안하였다. 또한, 매입말뚝의 거동에 영향을 주는 인자 중 시멘트풀의 유무 그리고 시멘트풀-지반 사이의 인터페이스 모델에 대한 분석을 수행하였다. 해석결과, 시멘트풀이 있는 경우 주면마찰력이 급격히 증가하는 것이 확인되었고, 침하량은 감소하는 것으로 확인되었고, 본 연구에서 제안한 t-z 곡선이 매입말뚝 거동을 더 정확히 예측할 수 있다는 것을 알 수 있었다.

References
1
Dassault Systems. (2013), “ABAQUS CAE 6.13 Manual”
2
Korea Expressway Corporation. (2012), “Expressway construction guide specification”
3
O’Neill, M. and Hassan, K. (1994), “Drilled Shaft : Effects of Construction on Performance and Design Criteria”, Proceedings of the International Conference on Design and Construction of Deeu Foundations, Federal Highways Administration, Washington D.C., Vol.1, pp.137-187.
4
O’Neill, M., Townsend, F., Hassan, K., Buller, A., and Chan, P. (1996), “Load Transfer for Drilled Shafts in Intermediater Geomaterials”, Federal Highways Administration.
5
Hong, W., Lee, J., and Chai, S. (2008), “Bearing Capacity of SDA Augered Piles in Various Grounds Depending on Water-cement Ratio of Cement Milk”, Journal of Korean Geotechnical Society, Vol.24, No.5, pp.37-54.
6
Lim, H., Park, Y., and Park, J. (2002), “Investigation of Characteristics and Suggestion of Evaluation Formulae for Skin Resistance of SIP”, Journal of the Korean Geoenvironmental Society, Vol.3, No. 2, pp.15-21.
7
Park, J. (2004), “Strength and Friction behavior of Cement Paste Poured in the Bored Pile”, Journal of the Korean Geoenvironmental Society, Vol.5, No.3, pp.31-39.
8
Jeong, S., Lee, J., and Lee, C. (2004), “Slip Effect of the Pile-soil Interface on Dragload”, Computers and Geotechnics, Vol.31, pp. 115-126.
9
Reddy, K. and Saxena, S. (1993), “Effects of Cementation on Stress-strain and Strength Characteristics of Sands”, Soils and Foundations, Vol.33, No.4, pp.121-134.
10
Uesugi, M. and Kishida, H. (1986), “Influential Factors of Friction between Steel and Dry Sands”, Soils and Foundations, Vol.26, No. 2, pp.33-46.
11
Uesugi, M., Kishida, H., and Tsubakihara, Y. (1989), “Friction between Sand and Steel under Repeated Loading”, Soils and Foundations, Vol.29, No.3, pp.127-137.
12
Uesugi, M., Kishida, H., and Uchikawa, Y. (1990), “Friction between Dry Sand and Concrete under Monotonic and Repeated Loading”, Soils and Foundations, Vol.30, No.1, pp.115-128.
Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 33
  • No :1
  • Pages :31-38
  • Received Date : 2016-10-06
  • Revised Date : 2016-11-30
  • Accepted Date : 2016-12-17
  • DOI :https://doi.org/10.7843/kgs.2017.33.1.31
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