International Journal of Highway Engineering (한국도로학회논문집)

Korean Society of Road Engineers (한국도로학회)
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Evaluation of Geogrid-Reinforced Subbase Layer Thickness of Permeable Flexible Pavements based on Permanent Deformation Model

지오그리드로 보강된 투수성 연성포장 보조기층제 영구변형을 고려한 층두께 산정 비교 연구

  • 권혁민 (한국교통대학교 철도시설공학과) ;
  • 오정호 (한국교통대학교 철도시설공학과) ;
  • 한신인 (서영엔지니어링 기술연구소)
  • Received : 2014.12.26
  • Accepted : 2015.01.13
  • Published : 2015.02.16
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Abstract

PURPOSES : The objective of this study is to evaluate the effectiveness of a geogrid reinforced subbase of permeable flexible pavement structures with respect to permanent deformation. METHODS : Experimental trials employing a repeated triaxial load test scheme were conducted for both a geogrid reinforced subbase material and a control specimen to obtain the permanent deformation properties based on the VESYS model. Along with this, a finite element-based numerical analysis was conducted to predict pavement performance with respect to the rutting model incorporated into the analysis. RESULTSAND CONCLUSIONS : The results of the experimental study reveal that the geogrid reinforcement seems to be effective in mitigating permanent deformation of the subbase material. The permanent deformation was mostly achieved in the early stages of loading and then rapidly reached equilibrium as the number of load applications increased. The ultimate permanent deformation due to the geogrid reinforcement was about 1.5 times less than that of the control specimen. Numerical analysis showed that the permeable, flexible pavement structure with the geogrid reinforced subbase also exhibits less development of rutting throughout the service life. This reduction in rutting led to a 20% decrease in thickness of the subbase layer, which might be beneficial to reduce construction costs unless the structural adequacy is not ensured. In the near future, further verification must be conducted, both experimentally and numerically, to support these findings.

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References

  1. Adu-Osei, A., (2000). Characterization of Unbound Granular Layers in Flexible Pavements. Ph.D. dissertation, Texas A&M Univ., College Station, Tx.
  2. Applied Research Associates (ARA). (2001). Correlation of CBR Values with Soil Index Properties-Appendix CC-1, Guide for Mechanistic-Empirical Design of New and Rehabilitated Pavement Structures, Champaing, Illinois.
  3. Duncan, J. M., Chnag, C. Y. (1970). "Nonlinear Analysis of Stress and Strain in Soils,"Journal of the Soil Mechanics and Foundations Division, ASCE, 96(SM5), pp. 1629-1653.
  4. Giroud, J. P., and Noiray, L. (1981)," Geotextile-reinforced unpaved roads,"Journal of Geotechnical Engineering Division, ASCE, Vol. 107(9), pp. 1233-1254.
  5. Holtz, R. D., Christopher, B. R., and Berg, R. R. (1998), Geosynthetic design and construction guidelines, FHWA, Washington D.C., FHWA-HI-98-038, 460p
  6. Kenis, W. J. (1978), Predictive Design Procedure, VESYS $User^{\circ}$Os Manual: An Interim Design Method for Flexible Pavement Using the VESYS Structural Subsystem. Final Report No. FHWA-RD-77-154, FHWA, Washington D.C.
  7. Lee, S. H., Yoo, I. K., and Kim, J. W. (2011), "A Study on the Structural Design of Permeable Asphalt Pavement,"Journal of the Korean Society of Road Engineers, Vol. 13, No. 3, pp. 39-49 (in korean). https://doi.org/10.7855/IJHE.2011.13.3.039
  8. Oh, J., Lytton, R. L., Fernando, E. G. (2006), Modeling of Pavement Response Using Nonlinear Cross-Anisotropy Approach, Journal of Transportation Engineering, Vol. 132, No. 6, pp.458-468. https://doi.org/10.1061/(ASCE)0733-947X(2006)132:6(458)
  9. Tseng, K-H., and Lytton, R. L. (1989), Prediction of Permanent Deformation in Flexible Pavement Materials. Implication of Aggregates in the Design, Construction, and Performance of Flexible Pavements, ASTM STP 1016, ASTM, Philadelphia, PA, pp. 154-172,
  10. Tutumluer, E., and Thompson, M. R. (1997). "Anisotropic modeling of granular based in flexible pavements". Transportation Research Record. 1577, Transportation Research Board, Washington, D.C., pp.18-26. https://doi.org/10.3141/1577-03
  11. Ullidtz, P. (1997), Modeling of Granular Materials Using the Discrete Element Method. Proc. of the 8th International Conference on Asphalt Pavements, Seattle, WA, pp.757-769.
  12. Zhou, F., Fernando, E., and Scullion, T. (2008). A Review of Performance Models and Test Procedures with Recommendations for Use in the Texas M-E Design Program, Research Report FHWA/TX-08/0-5798-1, Texas Transportation Institute, College Station, Tx.