PART I-CAST-IN-DRILLED-HOLE-PILES IN ADVERSE SOIL CONDITIONS

TO INCREASE THE AREAS IN WHICH CAST-IN-DRILLED HOLE PILES CAN BE USED, THREE 16 IN. DIAMETER TEST PILES WERE DRILLED AND INSTALLED WHERE THIS PILE TYPE IS NOT NORMALLY USED BECAUSE OF UNSTABLE SOIL CONDITIONS AND THE PRESENCE OF GROUND WATER. EACH TEST PILE WAS INSTALLED DIFFERENTLY TO DETERMINE THE MOST SUCCESSFUL INSTALLATION METHOD AND ITS EFFECTS ON THE PILE BEARING CAPACITY. TWO OF THE PILES WERE DRILLED WITHOUT BENTONITE; ONE BEING POURED AFTER BAILING THE HOLE DRY WHILE THE OTHER WAS POURED WITHOUT DEWATERING, A THIRD PILE WAS DRILLED WITH BENTONITE AND POURED AFTER BAILING THE BENTONITE. THE TEST RESULTS INDICATE THAT DRILLING CIDH PILES WITH BENTONITE OR POURING THEM WITHOUT DEWATERING THE PILE HOLE DECREASES THE PILE BEARING CAPACITY. THESE RESULTS ASSUME THAT ANY BEARING DIFFERENCE IS DUE TO THE INSTALLATION METHOD AND NOT OTHER VARIABLES. NO CONCLUSION WAS REACHED ON THE BEST INSTALLATION METHOD TO PREVENT CAVING OR SLOUGHING OF THE HOLE WALLS SINCE THE SOILS AT THE SITE WERE MORE STABLE THAN ANTICIPATED./AUTHOR/

  • Corporate Authors:

    California Division of Highways

    Bridge Department
    Sacramento, CA  United States  05914

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Hager, R F
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00230728
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: D-5-22
  • Files: TRIS, USDOT
  • Created Date: Mar 7 1971 12:00AM