MICHIGAN STUDY OF PILE DRIVING HAMMERS-CLOSURE

THE AUTHOR RESPONDS TO DISCUSSIONS IN JULY, 1966, IN WHICH BOGGS EMPHASIZED A NUMBER OF THE IMPORTANT RESULTS OF THE INVESTIGATION INCLUDING THE SIGNIFICANCE OF IMPROVING THE DESIGN OF CUSHION BLOCKS AND SELECTING HAMMERS FOR SPECIFIC JOB CONDITIONS, DEPENDING ON WHETHER HEAVY DRIVING OR SPEED OF PENETRATION WITH LIGHT DRIVING WERE THE CONTROLLING FACTORS. BENTLEY AND GREAVES SUGGESTED TWO DIFFERENT APPROACHES TO BRIDGING THE GAP BETWEEN DYNAMIC RESISTANCE DURING DRIVING AND THE STATIC LOAD CAPACITY OF PILES. THE WORK CONCEPT USED BY BENTLEY INDICATES A SUFFICIENTLY GOOD CORRELATION IN THE ONE EXAMPLE GIVEN TO JUSTIFY A MORE COMPLETE COMPARATIVE ANALYSIS OF THE MICHIGAN TEST SERIES. THE NONDIMENSIONAL IMPULSE CHARACTERISTIC NUMBER SUGGESTED BY GREAVES MAY BE ANOTHER PROMISING APPROACH WITH A SOUND THEORETICAL BACKGROUND CONFIRMED BY HIS PRACTICAL EXPERIENCE. THE AUTHOR IS IMPRESSED BY THE POSSIBILITY OF THE IMPULSE APPROACH AS HE ALSO USED A MOMENTUM-IMPULSE RELATIONSHIP IN DEVELOPING A PENETRATION METHOD OF EVALUATING SOIL RESISTANCE IN COMMERCIAL BORING AND SAMPLING. REFERENCES: MICHIGAN STUDY OF PILE DRIVING HAMMERS, WILLIAM S. HOUSEL, PROC. PAPER 4483, JOURNAL OF THE SOIL MECHANICS AND FOUNDATIONS DIVISION, PROCEEDINGS OF THE AMERICAN SOCIETY OF CIVIL ENGINEERS, SEPTEMBER, 1965. FIELD MANUAL OF SOIL ENGINEERING, 4TH ED., MICHIGAN STATE HIGHWAY DEPT., LANSING, MICHIGAN, 1960. A PENETRATION METHOD OF MEASURING SOIL RESISTANCE, WILLIAM S. HOUSEL, PROCEEDINGS, AMERICAN SOCIETY FOR TESTING AND MATERIALS, VOL. 35, 1935.

  • Supplemental Notes:
    • Vol 94, No SM5, PP 1177-1178, 3REF, 1APP
  • Corporate Authors:

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    ,   USA 
  • Authors:
    • Housel, W S
  • Publication Date: 0

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  • Accession Number: 00232518
  • Record Type: Publication
  • Report/Paper Numbers: No SM5, Proc Paper 490
  • Files: TRIS
  • Created Date: Aug 15 2004 2:43AM