INFLUENCE OF COMPRESSIBILITY ON THE ULTIMATE BEARING CAPACITY OF PILES IN NON-COHESIVE SOIL

INFULENCE DE LA COMPRESSIBILITE SUR LA FORCE PORTANTE A LA RUPTURE DES PIEUX EN MILIEU PULVERULENT

This paper was presented to the French Committee of Soil Mechanics, 17th February 1975. The authors present the results of numerous driving operations carried out in the laboratory in a test tank in homogeneous sand of variable density, in two-course sand layers, and in a medium artificially overloaded to simulate the influence of a soft clay layer situated on top of the anchorage layer. These tests show the limitation of nq formulae (high bearing capacity coefficient) and demonstrate that the friction angle of the material is not the parameter to take into account when the limit stress occurs. The notion of critical depth is defined, and its decrease with the intensity of the excess load applied to the anchorage layer, is shown. A design method is proposed for evaluating the limit bearing capacity and the ultimate bearing capacity for anchorage heights smaller than the depth at which gradation occurs. /TRRL/

  • Corporate Authors:

    Societe de Diffusion de Tech du Bat et de Trav Pub

    9 rue la Perouse
    Paris 16e,   France 
  • Authors:
    • Foray, P
    • Puech, A
  • Publication Date: 1976-5

Language

  • French

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00188274
  • Record Type: Publication
  • Source Agency: Central Laboratory of Bridges & Highways, France
  • Files: ITRD, TRIS
  • Created Date: Apr 12 1979 12:00AM