한국지반공학회논문집 (Journal of the Korean Geotechnical Society)

  • 제34권6호
  • /
  • Pages.5-16
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  • 2018
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  • 1229-2427(pISSN)
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  • 2288-646X(eISSN)
한국지반공학회 (Korean Geotechnical Society)
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수평하중을 받는 2×2 무리말뚝의 실험적 거동 특성

Experimental Behavior Characteristics of 2×2 Group Pile under Lateral Loads

  • 권오균 (계명대학교 건축토목공학부 토목공학전공) ;
  • 박종운 (대구공업대학교 토목조경과)
  • Kwon, Oh-Kyun (Dept. of Civil Engrg., Faculty of Architecture & Civil Engrg., Keimyung Univ.) ;
  • Park, Jong-Un (Dept. of Civil Engrg. & Landscape Architecture, Daegu Technical Univ.)
  • 투고 : 2017.10.19
  • 심사 : 2018.06.15
  • 발행 : 2018.06.30
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초록

본 연구에서는 수평하중을 받는 연직 및 경사말뚝에 대하여 실내 대형 모형실험을 수행하여 무리말뚝의 배열방법과 경사각도에 따른 무리말뚝의 수평지지력 특성을 파악하였다. 또한 말뚝직경(D), 말뚝의 중심간격, 말뚝길이, 지반면 상부 말뚝돌출길이, 상재하중 등을 변화시켜 무리말뚝의 거동에 미치는 영향을 파악하였다. 이러한 실험 결과로부터 수평하중을 받는 $2{\times}2$ 배열 무리말뚝의 경우, 말뚝을 수직으로 시공하는 것보다 양쪽으로 경사지게 시공하는 것이 더 유리한 것으로 나타났다. 그리고 무리말뚝에서 수평지지력에 미치는 요소에 대한 실험 결과, 무리말뚝에 가장 큰 영향을 미치는 요소는 말뚝길이인 것으로 나타났다. 근입깊이비(L/D)가 26.5에서 36.5로 커지면, 수평지지력이 3~4배 이상 증가하는 것으로 나타났다. 그러나 말뚝 중심간격, 말뚝돌출길이 및 상재하중은 무리말뚝의 수평지지력에 큰 영향을 미치는 못하는 것으로 나타났다.

In this study, the large scale laboratory model tests were executed to investigate the lateral resistance characteristics of $2{\times}2$ group pile under lateral loads according to the array method and installation angle of piles. The effect on the behavior of $2{\times}2$ group pile was also investigated through model tests varying the pile diameter and length, distance to pile top from the ground surface, center-to-center (CTC) length and surcharge etc. From these test results, it was found that the lateral resistance of $2{\times}2$ group pile of which piles were constructed slantly in both directions was greater than that of group pile of which piles were constructed vertically. And as a result of parameter tests on the lateral resistance of $2{\times}2$ group pile, it was found that the most important parameter was the pile length. As the embedment depth ratio (L/D) increased to 36.5 from 26.5, the lateral resistance increased 3~4 times or more. But the center-to-center (CTC) length, distance to pile top from the ground surface and surcharge did not affect much on the lateral resistance of group pile.

키워드

참고문헌

  1. Awad, A. and Petrasovits, G. (1968), "Considerations on the Bearing Capacity of Vertical and Batter Piles Subjected to Forces Acting in Different Directions", Proceedings of the 3rd Budapest Conference on Soil Mechanics and Foundations Engineering, Budapest, pp. 484-497.
  2. Bae, W.S. (1997), Pullout Behaviors of Inclined Piles in Sand, Master thesis, Chungbuk National University (in Korean).
  3. Baugrundinstitut Stuttgart (1980), Institut Fur Grundbau Bodenmechanik, Stuttgart: Mitteilung, pp.61-65.
  4. Broms. B. B. (1964a), "Lateral Resistance of Piles in Cohesive Soils", ASCE, Vol.90, No.2, pp.27-63.
  5. Broms, B. B. (1964b), "Lateral Resistance of Piles in Cohesionless Soils", ASCE, Vol.90, No.3, pp.123-156.
  6. Chang, Y. L. (1937), "Lateral Pile Loading Test", ASCE, 102, pp. 272-278.
  7. Das, B. M. (1983), "A Procedure for Estimation of Uplift Capacity of Rough Piles", Soils and Foundation, Vol.23, No.3, pp.122-126. https://doi.org/10.3208/sandf1972.23.3_122
  8. Hanna, A.M. and Afram, A. (1986) "Pull-out Capacity of Single Batter Piles in Sands", Canadian Geotech. J., Vol.23, No.3, pp. 387-392. https://doi.org/10.1139/t86-054
  9. Kim, J.H. (2001), An Experimental Study on Bearing Capacity of Battered Pile, Master thesis, Keimyung University (in Korean).
  10. Kim, Y.S. and Kim, B.T. (1998), "Model Tests on the Characteristics of Lateral Behavior of Steel Pipe Pile in Homogeneous and Nonhomogeneous Soil Conditions", Journal of Korean Geotechnical Society, Vol.14, No.6, pp.153-166 (in Korean).
  11. Korean Geotechnical Society (2009), Design Specification of Foundation of Structures and Explanation, Goomibook, Seoul (in Korean).
  12. Matlock, H. and Reese, L. C. (1960), "Generalized Solution for Laterally Loaded Piles", Soil Mechanics and Foundations Division, ASCE, Vol.86, No.5, pp.63-91.
  13. Meyerhof, G.G. (1973), "Uplift Resistance of Inclined Anchors and Piles", 8th International Conference on Soil Mechanics and Foundation Engineering, Moscow, pp.167-172.
  14. Meyerhof, G.G. and Ranjan, G. (1973), "The Bearing Capacity of Rigid Piles under Inclined Loads in Sand. II: Batter Piles", Canadian Geotech. J., Vol.10, pp.71-85. https://doi.org/10.1139/t73-006
  15. Park, J. U. (2012), A Study on Behavior Characteristics of Concrete Pile under Lateral Loads, PhD thesis, Keimyung University (in Korean).
  16. Park, Y.H., Kim, S.H., Kim, N.Y., and Yook, J.H. (2009), Foundation Engineering Practice and Integral Abutment Bridge, Construction Guide Co., Seoul, pp.31-32 (in Korean).
  17. Sung, I.C., Lee, M.H., Choi, Y.K., and Kwon, O.K. (2013), “A Study on the Vertical Bearing Capacity of Batter Piles Subjected to Vertical Load”, Journal of Korean Geotechnical Society, Vol. 19, No.2, pp.49-55 (in Korean).