STEEL-PIPE PILE LOADING TEST IN TOKYO-NAGOYA EXPRESSWAY

RESULTS ARE PRESENTED OF LOADING TESTS OF STEEL-PIPE PILES USED IN THICK SOFT SOIL LAYER. STEEL PILES ARE USED MOSTLY AS STRUCTURAL FOUNDATIONS FOR FOUNDATIONS IN SOFT GROUND. DRILLING SURVEYS WERE CONDUCTED AND LOAD DISPLACEMENT RELATIONSHIPS DUE TO VERTICAL LOAD DETERMINED. TEST RESULTS INDICATE THAT THE COMPRESSIBILITY OF SOIL INSIDE THE STEEL PIPE HAVING AN OPEN END, WHEN DRIVEN INTO THE ALLUVIAL MEDIAN LAYER IS SMALL, AND NO CLOSING ACTION AT THE END IS OBSERVED. WHEN THE AXIAL FORCE OF PILE IS DIVIDED INTO SURFACE FRICTION FORCE AND END SUPPORTING FORCE, THE SURFACE FRICTION FORCE ON OPEN END PILE IS ALMOST THE SAME TO THAT OF CLOSED END PILE. FILLING THE CEMENT CONCRETE INTO PIPE IS A LITTLE MORE EFFECTIVE THAN NOT TREATING THE STEEL-PIPE PILE WHEN THE HORIZONTAL FORCE IS LESS THAN 25 TONS FOR LATERAL RESISTANCE. CHANG'S FORMULA REPRESENTS GOOD CONSISTENCY FOR COMPUTING LATERAL RESISTANCE. THE ALLOWABLE LIMIT OF ELASTIC BEHAVIOR IN THIS GROUND IS ABOUT 1 CM OF HORIZONTAL DISPLACEMENT FOR 60 CM DIAMETER PILE. TAMANO'S FORMULA SHOWS EXCELLENT CONSISTENCY FOR THE COMPARISON OF DATA ON HORIZONTAL DISPLACEMENT, VERTICAL DISPLACEMENT, ANGLE OF GYRATION AND CONFINING MOMENT AT PILE HEAD OF THE BLOCK FOOTING WHICH COMBINES THE HEADS OF PAIR PILES. THE LOAD-DEFORMATION RELATIONSHIP AND STRESS DISTRIBUTION IN SOIL OF SINGLE PILE IS DIFFERENT FROM THAT OF COMBINED PAIR PILES.

  • Supplemental Notes:
    • pp 37-56, 23 FIG, 9 TAB, 6 REF
  • Authors:
    • Sasadom
    • Sato, T
    • AKAI, K
  • Publication Date: 1967

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  • Accession Number: 00234365
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 15 1994 12:00AM