Seasonal Deterioration of Unsurfaced Roads
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 132, Issue 7
Abstract
Seasonal deformation of unsurfaced roads was observed over several years and was studied using pavement deterioration models and finite-element analysis. The Mathematical Model of Pavement Performance is a model designed for pavement deterioration prediction and was successfully used for seasonal deterioration modeling because of its flexibility in defining the pavement structure, properties, and seasonal impact. However, these types of models are designed for highways and are somewhat limited in soils characterization and manipulation of the forces at the road–tire interface. Therefore, a three-dimensional dynamic finite-element model of a wheel rolling over soil was applied to simulate local vehicle traffic on a secondary unpaved road. These simulations were used to study the effects of vehicle speed, load, suspension system, wheel torque, and wheel slip on rutting and washboard formation. Modeling results are compared to field measurements and observations.
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Acknowledgments
Field measurements of washboard formation were performed by Susan Kapp-Monaghan and Byron Young of CRREL. Specifications for the 1/4 car model were provided by Jim Lacombe of CRREL.
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© 2006 ASCE.
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Received: Mar 18, 2005
Accepted: Aug 17, 2005
Published online: Jul 1, 2006
Published in print: Jul 2006
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