SYMPOSIA PAPER Published: 01 January 1969

Energy Measurements for a Diesel Hammer


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.

Author Information

Davisson, M., T.
University of Illinois, Urbana, Ill.
McDonald, V., J.
University of Illinois, Urbana, Ill.
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Developed by Committee: D18
Pages: 295–337
DOI: 10.1520/STP47290S
ISBN-EB: 978-0-8031-6901-2
ISBN-13: 978-0-8031-6644-8