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Journal of Geotechnical & Geoenvironmental Engineering / Volume 132 / Issue 7 / TECHNICAL PAPERS

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Seasonal Deterioration of Unsurfaced Roads

J. Geotech. Geoenviron. Eng. 132, 852 (2006); http://dx.doi.org/10.1061/(ASCE)1090-0241(2006)132:7(852) (9 pages)

S. Shoop, M.ASCE1, R. Haehnel2, V. Janoo, M.ASCE3, D. Harjes4, and R. Liston5

1Research Civil Engineer, Cold Regions Research and Engineering Laboratory, U.S. Army Engineer Research and Development Center, Hanover, NH, 03755-1290 (corresponding author). E-mail: shoop@crrel.usace.army.mil
2Mechanical Engineer, Cold Regions Research and Engineering Laboratory, U.S. Army Engineer Research and Development Center, Hanover, NH 03755-1290.
3Chief Technical Advisor, United Nations Office for Program Services (UNOPS), Kabul, Afghanistan.
4Graduate Student, Massachusetts Inst. of Technol., Cambridge, MA 02139.
5Branch Chief; Retired, Cold Regions Research and Engineering Laboratory, U.S. Army Engineer Research and Development Center, Hanover, NH 03755-1290.

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(Submitted 18 March 2005; accepted 17 August 2005)

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.

© 2006 ASCE

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.

Article Outline

  1. Introduction
  2. Modeling Road Deterioration with MMOPP
  3. Deterioration Modeling Results
  4. Field Observations of Seasonal Distresses on Unpaved Roads
  5. Finite-Element Simulations and Results
    1. Rutting Model
    2. Washboard Model
  6. Spectral Analysis of Washboard Measurements and Finite-Element Analysis
  7. Summary and Conclusions

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ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1061/(ASCE)1090-0241(2006)132:7(852)

PUBLICATION DATA

ISSN

1090-0241 (print)  
1943-5606 (online)

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ASCE

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