Abstract
The authors describe and discuss experimental investigation of the effect exerted by blow frequency and additional static force on penetration rate of a pipe under vibration-percussion by a pneumatic hammer with using a measuring and recording instrumentation developed at the Institute of Mining, Siberian Branch, Russian Academy of Sciences. The penetration velocity ranges are found for the real blow frequencies of the test pneumatic hammer equipped with additional static load. Determination of static force sufficient to press the pipe in soil in hammer-free regime is reported.
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