STP444: Energy Measurements for a Diesel Hammer

    Davisson, M. T.
    Associate professor of civil engineering and associate professor of civil engineeringpersonal member ASTM, University of Illinois, Urbana, Ill.

    McDonald, V. J.
    Associate professor of civil engineering and associate professor of civil engineeringpersonal member ASTM, University of Illinois, Urbana, Ill.

    Pages: 43    Published: Jan 1969


    Abstract

    Measurements of pile force and deflection have been made at the head of a long concrete-filled pipe pile driven with a diesel hammer. The measurement techniques utilized are the first to allow calculation of energy transmitted to a pile. Energy transmitted to the pile was 73 percent of manufacturer's rated energy. Measurements, analyses, and logic regarding soil-pile behavior and the mechanics of diesel hammers allow several conclusions: (1) energy transmitted and peak pile force were linearly related for the near refusal driving conditions observed, (2) at combustion-impact diesel hammers contain more than twice manufacturer's rated energy, (3) at combustion-impact diesel hammers make approximately 100 percent of rated energy available for transmission to the pile, whereas steam hammers make only 80 to 85 percent available, and (4) analyses involving the one dimensional wave equation should be used instead of conventional dynamic formulas to estimate energy actually transmitted to the pile.

    Keywords:

    diesel hammers, pile driving, dynamic loads, pile hammers, evaluation, tests


    Paper ID: STP47290S

    Committee/Subcommittee: D18.11

    DOI: 10.1520/STP47290S


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