Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Evaluation of Ultimate Lateral Resistance for Single Pile Using Strain Wedge Model in Sand

모래지반에서 쐐기모델을 이용한 단말뚝의 극한수평저항력 산정

  • Kim, Ji-Seong (Research Institute for Infrastructure Performance, Korea Infrastructure Safety Corporation) ;
  • Kang, Gi-Chun (Dept. of Civil Engrg., Engrg. Research Institute, Gyeongsang National Univ.)
  • 김지성 (한국시설안전공단 시설성능연구소) ;
  • 강기천 (경상대학교 토목공학과 공학연구원)
  • Received : 2016.04.11
  • Accepted : 2016.11.14
  • Published : 2016.12.31
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Abstract

The magnitude of the lateral resistance that resists the lateral movement of the pile is controlled by the amount of the pile movement and the strength and stiffness of soil. In this paper, we proposed an equation which produces the ultimate lateral resistance of the laterally loaded single pile in sand using the strain wedge model of the soil deformation. The ultimate lateral resistance in strain wedge model is composed of earth pressure of wedge rear, the shear resistance on the side of the wedge, and the frictional resistance between pile and ground. The ultimate lateral resistance determined by the proposed equation was compared with the Ashour, F.D.M., field test in sand. As a result, the error of the proposed equation and Ashour theory, field test, F.D.M were respectively 1.03%, 0.40~3.32%, 6.02%.

본 연구에서는 Strain wedge 해석모델을 이용하여 수평하중이 작용하는 단말뚝의 극한수평저항력 산정식을 제안하였다. 저항특성은 쐐기 후면부의 수평저항토압, 쐐기 측면부의 전단저항, 그리고 말뚝과 지반의 마찰저항으로 구분하였고, 이들의 합으로써 극한수평저항력을 산정하였다. 제안된 식을 기존의 쐐기 이론과 현장실험, 유한차분법과비교 분석하였다. 그 결과 제안식의 값이 기존의 쐐기 이론과 1.03%, 현장실험과는 0.40~3.32%, 유한차분법과는 6.02%의 차이를 보였다.

Keywords

References

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  1. Ultimate Lateral Resistance of Quadrangle Array Piles Using the Strain Wedge Model on Soil Subgrade vol.46, pp.6, 2018, https://doi.org/10.1520/JTE20170132