ULTIMATE LOAD OF GROUPS OF PILES, EXPERIMENTAL AND THEORETICAL ASPECTS

CHARGE LIMITE DES GROUPES DE PIEUX, BASES EXPERIMENTALES ET THEORIE

CALCULATION METHODS BASED ON THE ELASTIC THEORY DO NOT PERMIT THE ACCURATE DETERMINATION OF LIMIT FORCES APPLICABLE TO A GROUP OF PILES: (1) THE INTERACTION OF THE PILE AND GROUND WHEN SUBJECTED TO LATERAL FORCES DOES NOT FOLLOW THE LAW OF ELASTICITY, AND (2) A GROUP OF PILES FORMS A SYSTEM CONTAINING TOO MANY BONDS, THE STRENGTH OF WHICH DIMINISHES PROGRESSIVELY FROM INITIAL PLASTIFYING TO COMPLETE FAILURE. USING THE RESULTS OF FULL-SCALE TESTS, THE AUTHOR DEFINES A SAFETY RANGE FOR THE PILE/GROUND SYSTEM FOR A SINGLE PILE. THE INTRINSIC FIELD OF SAFETY OF THE PILE IS ALSO DEFINED AS A FUNCTION OF THE CHARACTERISTICS OF ITS CONSTITUTIVE INGREDIENTS. THE LIMIT EQUILIBRIUM CONDITIONS ARE THEN EXPRESSED FOR ALL EXTERNAL FORCES APPLIED TO THE FOUNDATION. IN THE SPECIAL CASE WHERE THE LATERAL REACTION OF THE SUBGRADE IS NOT TAKEN INTO ACCOUNT THE PROBLEM IS REDUCED TO THE MAXIMIZATION OF A LINEAR SHAPE UNDER LINEAR CONDITIONS; ITS SOLUTION IS KNOWN. IT IS DEMONSTRATED THAT THIS METHOD CAN ALSO BE APPLIED TO THE MORE GENERAL CASE WHEN THE LATERAL REACTION OF THE SUBGRADE IS TAKEN INTO ACCOUNT. DIFFERENT EXAMPLES SOLVED WITH AN OPERATIONAL COMPUTING PROGRAM ARE GIVEN.

Language

  • French

Media Info

  • Pagination: 49-84
  • Serial:
    • ANN ITBTP
    • Issue Number: 328
    • ISSN: 0020-2568

Subject/Index Terms

Filing Info

  • Accession Number: 01296807
  • Record Type: Publication
  • Source Agency: Institut Francais des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)
  • Files: ITRD
  • Created Date: Nov 21 2010 6:05AM