Repeated load testing over a period of 13 to 23 months was conducted at two test sites on five separate pilings. Four of the test piles were drilled shafts, the other being a timber piling. Previous observations of changing ultimate bearing capacity with respect to continued load testing were thought to be the result of climatic influences. The loss in bearing capacity is attributed to residual soil strength after repeated shear has occurred. Minor fluctuations in residual ultimate load capacity may be due to climatic influences. The residual ultimate load capacities more nearly approximate the original bearing calculations performed for the "Determination of Pile Bearing Capacities", than was found at the completion of that study. The analysis covered climatological data, nuclear moisture density data and load test data. The method of load testing used was a calibrated hydraulic jack-reaction beam system. The method of load testing followed A.S.T.M. standards, with minor modifications. The modifications were made in the settlement rate required to advance to the next higher load.

Media Info

  • Features: Figures; Tables;
  • Pagination: 40 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00265457
  • Record Type: Publication
  • Report/Paper Numbers: Final Rpt.
  • Created Date: Mar 6 1975 12:00AM