Journal of the Korean GEO-environmental Society (한국지반환경공학회 논문집)

Korean Geo-Environmental Society (한국지반환경공학회)
권호 표지

Study on Settlement Calculation of the Long-Short Pile Composite Foundation

  • XU, Xin (Dept. of Civil and Environmental Engineering, Hanyang University) ;
  • Kwag, Yunehyeong (Dept. of Civil Engineering, Kyonggi University) ;
  • Chun, Byungsik (Dept. of Civil and Environmental Engineering, Hanyang University)
  • Published : 2013.07.01
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Abstract

As a new foundation treatment technology, long-short pile composite's design theory is still in primary phase, and there are no explicit settlement calculation methods in active codes. So it is necessary to study the working mechanism and the methods of settlement calculation. In this paper, the mechanics of long-short pile composite foundation are fully discussed. Meanwhile, based on the shear deformation method, the Mylonakis & Gazetas models about mutual action between two piles and the one between pile and soil are introduced, Considering the performance of cushion, the flexible factors of mutual actions are provided. Then the settlement calculation of long-short pile composite foundation which can consider the mutual actions between pile, soil and cap is deduced, and the correlated program is also developed. Finally, an engineering example is discussed with the method. A comparison shows that calculated results and measured data from a field test pile are in a good agreement, indicating that the presented approach is feasible and applicable in engineering practice.

Keywords

References

  1. Avilkin, V. L, Alekasanrov V M, Kovalenko E V.(1985),On using the more-accurate equations of thin coatings in the theory of axisymmetric contact problems for composite foundations, Applied Mathematics and Mechanics, Vol. 49, No. 6, pp. 770-775 (in Chinese). https://doi.org/10.1016/0021-8928(85)90015-2
  2. Beijing China Architecture and Building Press(1995), The compilation committee of pile foundation engineering manual, pp. 12-15 (in Chinese).
  3. Chow, Y. K.(1986), Analysis of vertically loaded pile grounds, International Journal for Numerical and Analytical Methods in Geomechanics, Vol. 10, pp. 60-70.
  4. DENG Chao, GONG Xiaonan, ZHANG Xianming(2003), Application of long-short-pile composite foundtion to high-rise building, Building Construction, Vol. 25, No. 1, pp. 18-20 (in Chinese).
  5. Dogruglu, A. N. Omurtag M H.(2000), Stability analysis of composite-plate foundation interaction by mixed FEM, Journal of Engineering Mechanics, Vol. 126, No. 9, pp. 768-774.
  6. GE Xinsheng, GONG Xiaonan, ZHANG Xianming(2002), Design of long-short-pile composite foundation, Building Structures, Vol. 32, No. 7, pp. 3-7 (in Chinese).
  7. GE Xinsheng, GONG Xiaonan, ZHANG Xianming(2003), FEM analysis and design of long-short-pile composite foundation, Journal of Building Structures, Vol. 24, No. 4, pp. 91-96 (in Chinese).
  8. GU Xiao-lu (2003), Soil and foundation, 3rd Edn. Beijing: China Architecture and Building Press, pp. 4-6 (in Chinese).
  9. MA Ji, ZHANG Donggang(2001), Design of the composite foundation with long-short-pile, Geotechnical Engineering Technique, Vol. 15, No. 2, pp. 86-92 (in Chinese).
  10. Mylonakis, G., Gazetas, G.(1998), Settlement and additional internal force of grouped piles in layered soil, Geotechnique, Vol. 48, No. 1, pp. 55-73. https://doi.org/10.1680/geot.1998.48.1.55
  11. SHI Feng(2002), Analysis of bering capacity and deformation of composite foundation, Manufactured Build- ing, Vol. 32, No. 9, pp. 41-45 (in Chinese).
  12. ZHANG Ding(1998), Settlement analysis and computation for composite foundation of friable material pile, Journal of the China Railway Society, Vol. 20, No. 6, pp. 98-104 (in Chinese).
  13. ZHAO Minghua, ZHANG Ling(2005), Settlement calculation for long-short composite piled raft foundation, Journal of the china railway society, Vol. 6, No. 6, pp. 34-39 (in Chinese).
  14. ZHU Baili, SHEN Zhujiang(1990), Calculation of soil mechanics, Shanghai Scientific Press, Shanghai, pp. 9-11 (in Chinese).