FIELD TESTS OF LARGE DIAMETER DRILLED SHAFTS. PART I - LATERAL LOADS. FINAL REPORT

Field tests of large diameter drilled shafts under lateral loads were conducted on the Century Freeway, I-105 site. The project objectives were to evaluate the feasibility and cost of using 8-ft-diameter shafts, and to determine the lateral load capacity. These shafts are currently designed using the computer program COM624 to predict shaft behavior. COM624 utilizes soil response curves that have been developed using theoretical models and field test data on laterally loaded piles that are 4 ft or less in diameter. After successfully installing drilled shafts, a pair of 4 ft and a pair of 8 ft shafts were tested under lateral loads. Shaft behavior was predicted using COM624 utilizing site specific data and material test data. Comparison of predicted with experimental results show that field test deflections were larger than those predicted under the maximum test loading but that they were better correlated if variation of shaft flexural rigidity is taken into account. Experimental maximum moments were higher than those predicted. The point of zero deflection on deflection versus depth curves was nearly the same for predicted and experimental values. At loads of typical design level, moment and deflection were adequately predicted using COM624.

Media Info

  • Features: Appendices; Figures; Photos; References;
  • Pagination: 96 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00622323
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/CA/SD-88/02, Rept 59314-624234
  • Contract Numbers: F87SD03, 624234
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: May 31 1996 12:00AM