›› 2014, Vol. 35 ›› Issue (S2): 245-249.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Calculation of the ultimate uplift capacity of single piles in sand

ZOU Dan1, 2, HE Huai-jian1   

  1. 1. Institute of Rock and Soil Mechanics , Chinese Academy of Sciences , Wuhan 430071, China; 2.College of Civil Engineering, Hunan University, Changsha 410082, China
  • Received:2014-03-18 Online:2014-10-31 Published:2014-11-12

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Abstract: As an important parameter of calculating the limit skin friction which is a main part of the ultimate uplift capacity of single piles in sand, the rationality of the coefficient of lateral earth pressure K will affect the accuracy of the ultimate uplift capacity of single piles. Firstly, based on the passive stress state of dense sand around uplift piles and the active stress state of loose sand around uplift piles, the coefficients of lateral earth pressure of different relative densities sand are derived considering the effects of the skin friction and the surface roughness of piles. Afterwards according to cylindrical shear failure mode, a method for predicting the ultimate uplift capacity of single piles in sand is obtained considering the development critical depth of unit skin friction. Lastly, the test results of uplift piles are analyzed by the present method and the predicted ultimate uplift capacity of single piles agree well with those measured values.

Key words: single pile, ultimate uplift capacity, limit skin friction of piles, coefficient of lateral earth pressure, sand

CLC Number: 

  • TU 473
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