FIELD PERFORMANCE OF DRIVEN ENLARGED-TIP PILES

Recent experience is presented on the performance of piles with a precast enlarged tip in a variety of soil profiles in the New York City area. The design, construction, and use of one version of enlarged-tip pile are described, along with the conditions under which it may be used to advantage. Although more costly than conventional piles, enlarged-tip piles are used economically where they are significantly shorter than conventional piles or of higher capacity, thus allowing pile substitutions of one for two or one for three. Wave equation analysis of pile driving has made it possible to predict very closely the appropriate hammer size, cushioning material, and driving resistance necessary to produce specific pile capacities with various combinations of pile tips and stems. Soil bearing capacity theory helps to explain why field performance of enlarged-tip piles is markedly superior to that of conventional piles, especially in loose granular soils. Case histories illustrate the range of conditions under which these piles have proved effective.

Media Info

  • Features: Figures; References;
  • Pagination: p. 70-76
  • Monograph Title: PERFORMANCE OF EARTH RETAINING STRUCTURES AND PILE FOUNDATIONS
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00084128
  • Record Type: Publication
  • ISBN: 0309023610
  • Files: TRIS, TRB
  • Created Date: Apr 22 1975 12:00AM