Measuring bearing capacity of forest roads with the advanced Benkelman Beam Apparatus
Gergely Markó, Péter Primusz & József Péterfalvi
Correspondence: Markó Gergely
Postal address: H-9400 Sopron, Bajcsy-Zsilinszky u. 4.
Forest roads covered with asphalt pavement represent the basis of the forest opening up networks in Hungary. If properly maintained, asphalt pavements offer a high level of service. While traffic load of forest road networks have grown, expenses on their maintenance remained lower then required in the last three decades. As a result, this roads are in poor condition, generally. Renovation projects demand the knowledge of the roads’ bearing capacity. Bearing capacity measurements of roads traditionally were carried out using the Benkelmann beam. The Benkelman beam measurements provide the maximum vertical deflection of the pavement under 50 kN of wheel load. Nowadays the bearing capacity of public roads are measured with falling weight deflectometers. Falling weight deflectometer measurements provide the full deflection basin. It is convenient to use these high precision instruments on forest roads, but their application is inefficient and costly. Researchers of the Department of Forest Opening Up developed a new method to measure the full deflection basin with the Benkelman beam. Besides the instrument improvement the authors developed a new method for the processing of the deflection basin data. New results are presented via the case study of a 2nd class opening up forest road.
Keywords: Benkelman-beam, forest road, bearing capacity, Pavement Management System
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Cite this article as:
Markó, G., Primusz, P. & Péterfalvi, J. (2012): Measuring bearing capacity of forest roads with the advanced Benkelman Beam Apparatus. Bulletin of Forestry Science, 2(1): 107-121. (in Hungarian)
Volume 2, Issue 1
3 September 2012
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