The Correlation between Static and Dynamic Moduli in Embankment of High Speed Railway

Authors

Abstract

The static modulus of elasticity from the load-settlement line of a second load cycle in a plate load test (PLT), Ev2, is a key parameter to control embankment bearing capacity, settlement and track quality in general. Because of the greater sensitivity in bearing capacity and settlement of high speed understructure, more strict limitations in this issue should be concerned in high speed rail codes so as each individual layer of fill should satisfy a special amount of Ev2. The PLT, as a test to determine Ev2, is expensive and time consuming. But, tests like Light Weight Deflectometer (LWD) that determines the dynamic modulus of elasticity could be economically more efficient. In this study, field data from several PLT and LWD tests, which have been performed over different layers of embankment in the Qom-Isfahan high speed railway, were analyzed. Then, linear and non-linear regression methods were used to extract the best-fit equations among the results. Similary, the relationship between these field data and laboratory tests of California bearing ratio was extracted. Furthermore, back-calculation was used to determine the static and dynamic elastic moduli of each layer individually.

Keywords

References

AASHTO. 1993. “AASHTO Guide for Design of Pavement Structures”. American Association of State Highway and Transportation Officials.
Ali, N. A. and Khosla, N. P. 1987. “Determination of Layer Moduli using a Falling Weight Deflectometer”. Transportation Research Record 1117, National Research Council, Washington, D.C., pp. 1-10.
Camargo, F., Larsen, B., Chadbourn, B., Roberson, R. and Siekmeier, J. 2006. “Intelligent Compaction: A Minnesota Case History”. 54th Annual University of Minnesota Geotechnical Conference, February 17.
Chen, D. H., Bilyeu, J. and He, R. 1999. “Comparison of Resilient Moduli between Field and Laboratory Testing: A Case Study”. The 78th Annual Meeting of the Transportation Research Board, Washington, D.C.
George, K. P. 2003. “Falling Weight Deflectometer for Estimating Subgrade Resilient Moduli”. Final Report, Research Division, Mississippi Department of Transportation, Jackson.
Newcomb, D. E. 1987. “Comparison of field and laboratory estimated resilient moduli of pavement materials”. Association of Asphalt Paving Technologists, Asphalt Paving Technol. 56: 91-106.
Ullidtz, P. 1987. “Pavement Analysis”. Elsevier, Amsterdam, The Netherlands.
Van Deusen, D. A., Lenngren, C. A. and Newcomb, D. E. 1994. “A Comparison of Laboratory and Field Subgrade Moduli at the Minnesota Road Research Project”. In: Von Quintas, H. L., Bush, A. J., Baladi, G. Y. (Eds.), Nondestructive Testing of Pavements and Backcalculation of Moduli, ASTM STP 1198.
Von Quintas, H. L. and Killingsworth, B. M. 1998. “Comparison of Laboratory and In-Situ Determined Elastic Moduli”. The 76th Annual Meeting of the Transportation Research Board, Washington, D.C.
Journal of Transportation Infrastructure Engineering
Volume 1, Issue 3 - Serial Number 3
November 2015
Pages 33-45

Files

History

  • Receive Date: 17 November 2015
  • Accept Date: 17 November 2015

Share

How to cite

Statistics