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Volume 40 Issue S2
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CHENG Hua-wei, CHENG Zhao, JIANG Chong, LI Yu. Influences of ultimate frictional resistance at low confining pressure on bearing characteristics of backfill piles[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(S2): 87-90. DOI: 10.11779/CJGE2018S2018
Citation: CHENG Hua-wei, CHENG Zhao, JIANG Chong, LI Yu. Influences of ultimate frictional resistance at low confining pressure on bearing characteristics of backfill piles[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(S2): 87-90. DOI: 10.11779/CJGE2018S2018
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Influences of ultimate frictional resistance at low confining pressure on bearing characteristics of backfill piles

  • 1. Hunan Provincial Communications Planning Survey & Design Institute, Changsha 410008, China;
    2. School of Resources and Safety Engineering, Central South University, Changsha 410083, China

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  • Received Date: July 21, 2018
  • Published Date: October 29, 2018
    Graphical Abstract
    • Abstract
  • In order to study the influences of the ultimate frictional resistance of the backfill on the bearing characteristics of piles, the method for calculating Q-S curve of piles with exponential load transfer equation is obtained by considering the nonlinear change of the ultimate frictional resistance of backfill under low confining pressure. This method is validated by combining the existing research results and engineering practice results, and the influences of parameters of the ultimate frictional resistance on bearing characteristics of piles are discussed. The results show that the side resistance of the rock-socked section first reaches the extreme value. The normal stress σ and the test parameters A and b of the material are very beneficial to improve the side resistance and the ultimate bearing capacity of piles. Especially, the influences of the normal stress σ on the side resistance and the ultimate bearing capacity of piles are obvious.
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    • References (7)
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