INCORPORATING SET-UP AND SUPPORT COST DISTRIBUTIONS INTO DRIVE PILE DESIGN. IN: CURRENT PRACTICES AND FUTURE TRENDS IN DEEP FOUNDATIONS

Accounting for set-up in pile design can result in using smaller hammers, smaller pile sections, shorter piles, higher capacities/allowable loads, and therefore more-economical installations than otherwise possible. Geotechnical characterization of a pile-foundation site (anticipated driving behavior, set-up magnitude and distribution, and long-term capacity distribution), combined with installation costs for various pile options, can be used to select cost-efficient pile installations based on support costs. Support cost is the cost of the installed or constructed foundation element (or system) divided by its allowable load. Two case histories are presented: the first utilizes dynamic monitoring during initial drive and restrike testing to characterize end-of-initial-drive capacity, unit set-up, and long-term capacity distributions. Such characterizations permit development of depth-variable penetration resistance criteria. The second case history presents long-term capacity and a number of installation cost components as functions of depth, which aids in determining support cost as a function of depth for two candidate pipe pile sections. The resulting support cost distributions are sued to select the most-cost-efficient pile selection and allowable pile load for the structure.

Language

  • English

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: p. 16-49
  • Monograph Title: CURRENT PRACTICES AND FUTURE TRENDS IN DEEP FOUNDATIONS
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00987880
  • Record Type: Publication
  • ISBN: 9780784407431
  • Files: TRIS
  • Created Date: Mar 9 2005 12:00AM