J. For. Sci., 2011, 57(10):439-450 | DOI: 10.17221/4/2011-JFS

Results of dynamic penetration test - an indicator of the compaction of surface soil horizons by forestry machinery

K. Rejšek1, J. Buchar1, I. Vaníček2, L. Hromádko1, V. Vranová1, K. Marosz1
Department of Geology and Pedology, Faculty of Forestry and Wood Technology,
1 Mendel University in Brno, Brno, Czech Republic
2 Geotechnical Department, Faculty of Civil Engineering, Czech Technical University Prague, Prague, Czech Republic

The objective of research was, on the basis of the exactly predefined input parameters of upper soil horizons of selected forest soils, to perform accurate measurements of the impact of soil loading by tested forestry machinery using the dynamic penetration test. The measurements by the dynamic penetration test in conditions changed by the wheel traffic of forestry mechanization were performed at three localities of the Křtiny Training Forest Enterprise, Masaryk Forest, a special-purpose facility of Mendel University in Brno. The dynamic penetration test was performed with a lightweight dynamic penetrometer. The methodology of the research is based on assessing the ability of soils to resist dynamic penetration of a rod with a cone, in relation to their lithological composition and physicomechanical properties; the measurement itself is defined by the ISO 22476-2 (2005) standard. Penetrometer measurements were repeated in the period after a harvesting operation and again 6 months later, i.e. in October 2007, April 2008 and October 2008. The results of the field dynamic penetration test and the results of laboratory testing of main soil physical parameters are presented in figures and tables. Besides the naturally variable soil compaction on geologically different substrates, the obtained original results document differences in the impact of particular forestry machines. In conditions of the identical geological substrate, the results indicate that the universal wheeled tractor had a more negative influence on the compaction of surface soil horizons compared to the multi-axle harvester and the forwarder.

Keywords: dynamic penetration test; soil compaction; soil mechanics; lightweight dynamic penetrometer

Published: October 31, 2011  Show citation

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Rejšek K, Buchar J, Vaníček I, Hromádko L, Vranová V, Marosz K. Results of dynamic penetration test - an indicator of the compaction of surface soil horizons by forestry machinery. J. For. Sci.. 2011;57(10):439-450. doi: 10.17221/4/2011-JFS.
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