SYMPOSIA PAPER Published: 01 January 1962

Facilities for Dynamic Testing of Soils


Very little is known about the strength of soils when subjected to a single large magnitude pulse load such as that which would be produced by a large explosion. To determine such information suitable laboratory test equipment must be developed.

Some suitable testing facilities have recently been developed at the University of Illinois and more are being planned, all of which operate pneumatically. Equipment is now available which will apply a concentrated load of 60 kips to a loading pad in as short a time as 2 milliseconds or apply a uniform pressure of 500 psi to the top of a soil specimen 2 ft in diameter and 2 ft deep in as short a time as 6 milliseconds. Additional facilities currently in the design stage will be built which will be able to apply a uniform pressure of up to 800 psi in as short a time as 3 milliseconds to the top surface of soil specimens which may be as small as the normal consolidation test specimen or as large as 6 ft in diameter and 6 ft deep.

These loadings may be maintained indefinitely or reduced at a controlled rate of decay.

Author Information

Sinnamon, G
University of Illinois, Urbana, Illinois
Newmark, N
University of Illinois, Urbana, Illinois
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Developed by Committee: D18
Pages: 38–44
DOI: 10.1520/STP44375S
ISBN-EB: 978-0-8031-5965-5
ISBN-13: 978-0-8031-6119-1