Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
권호 표지

Characteristics of Stress-Displacement on Uplift Loaded Group Piles

인발력을 받는 무리말뚝의 응력-변위 특성

  • Lee, Jun-Dae (Department of Civil Engineering, Semyung University) ;
  • Ahn, Byeong-Cheol (Department of Civil Engineering, Chungbuk National University)
  • 이준대 (세명대학교 토목공학과) ;
  • 안병철 (충북대학교 토목공학과)
  • Published : 2005.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

This experimental study was devoted to investigate skin friction of H group piles with uplift loading conditions in granite soil under laboratory test. Model piles made of steel embedded in weathered granite soil were used in this study. Pile arrangements($2{\times}2,\;3{\times}3$), pile space(2D, 4D, 6D), and soil density($D_r=40%,\;80%$) were tested. The main results obtained from the model tests can be summarized as follows. The series of tests found that ultimate uplift load and displacement for group piles were increased as piles space ratio increases to $D_r=40%$ of soil density. In the relative density of $D_r=80%$, bearing capacity for group piles was greater than for single pile. In the relative density of $D_r=40%$, the theoretical value of skin friction for group piles was greater than practical value. In the relative density of $D_r=80%$, both theoretical and practical value of skin friction for group piles were increased as piles space ratio increases.

Keywords

References

  1. Hegedus, E., and Khosla, V. K., 'Pullout Resistance of H - Piles', Journal of Geotechnical Engineering, ASCE, Vol. 100, No. 9, pp. 1274-1290, 1984
  2. Lam, T. S. K., Tse, S. H., Cheung, C. K., and Lo, A. K. Y., 'Performance for Two Steel H-Pile Founded in Weathered Meta-Siltstone', Hong Kong Geotechnical Engineering, Vol. 3, No. 2, pp. 5.6.1- 5.6.10., 1985
  3. Ho, J., and Weber, L., 'The Use of High Strength H Bearing Piles in Hong Kong', 4th International DFI Conference, pp. 249-254, 1991
  4. Das, B. M., 'A Procedure for Estimation of Uplift Capacity of Rough Piles', Soil and Foundation, Vol. 23, No.3, pp.122-126, 1983
  5. Tang, N. C., 'Static Uplift Capacity of Board Piles', Proceedings of Piling and Ground Treatment, ICE, London, pp. 197-202, 1983
  6. Darrag, A.A., 'Capacity of Driven Piles in Cohesionless Soils Including Residual Stresses', Ph. D. Thesis, Purdue University, pp. 20-60, 1987
  7. Matsumoto, T., and Takei, M., 'Effects of Soil Plug on Behaviour of Driven Pipe Piles', Soils and Foundations, Japanese Society of Soil Mechanic and Foundation Engineering, Vol. 31, No. 2, pp. 14- 34, 1991
  8. Meyerhof, G. G., 'Bearing Capacity and Settlement of Pile Foundation', Journal of Geotechnical Engineering, ASCE, Vol. 102, No. GT3, pp. 197-228, 1977
  9. Vesic, A. S., 'Bearing Capacity of Deep Foundations in Sand', Highway Research Record 39, Highway Research Board, National Research Council, Washington D, C., pp. 112-153, 1963
  10. 김명모, ''개단 말뚝의 폐색효과에 대한 모형실험 연구', 대한토목학회논문집, 제7권, 제3호, pp. 175-181, 1987
  11. Baligh, M. M., 'Cavity Expansion in Sands with Curved Envelopes', Journal of Geotechnical Engineering, ASCE, Vol. 102, No. GT11, pp. 1131- 1147, 1976