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Mitigation of Temperature-Induced Curling of Concrete Roadbed along High-Speed Railway: In situ Experiment and Numerical Simulation

  • Railroad Engineering
  • Published:
KSCE Journal of Civil Engineering Aims and scope

Abstract

The concrete roadbed in the Beijing-Shenyang high-speed railway (HSR) is being serviced for the first time in HSR construction history. Rail inspections have shown that the extreme temperature conditions in seasonally freezing regions can significantly influence the curling behavior of concrete roadbeds. This paper presents an in situ experiment to fundamentally evaluate the impact of seasonal temperature variations on the curling behavior of concrete roadbeds. Herein, a thermomechanical coupled finite element (FE) model is built and calibrated with experimental data. Then, specific consideration is given to the curling mitigation measures, including adjusting the thickness, length, and construction form of the concrete roadbed. Mitigating upward-curling behavior by increasing the thickness of the concrete roadbed will result in severe downward-curling behavior during one year of service. Finally, an active groove-setting construction form is suggested to prevent curling from the temperature variations in the concrete roadbed. In general, this study further enhances the common understanding of the temperature curling behavior of concrete roadbeds serviced in an HSR.

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Abbreviations

A :

temperature amplitude at the natural ground surface

t :

time

T n :

surface boundary temperature

T α :

ground surface mean temperature

α 0 :

initial phase angle

ΔT F :

temperature increment caused by adherent layer

ΔT g :

temperature gradient

ΔT w :

temperature increment caused by climate warming effect

δ :

vertical deflections

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Acknowledgements

This research was supported by the National Key R&D Program of China (Grant No. 2016YEE0205100), the Key Program of the National Natural Science Foundation of China (Grant No. 41430634), the National Major Scientific Instruments Development Project of China (Grant Nos. 41627801 and 41702382), the Open Research Fund Program of the State Key Laboratory for Geomechanics and Deep Underground Engineering of China (Grant No. SKLGDUEK1807), the Open Research Fund Program of the State Key Laboratory of Permafrost Engineering of China (Grant No. SKLFSE201709), the Opening Fund for Innovation Platform of China (Grant No. 2016YJ004), and the Technology Research and Development Plan Program of China Railway Corporation (Grant No. 2016G002-F).

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Correspondence to Liang Tang.

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Yu, Y., Tang, L., Ling, X. et al. Mitigation of Temperature-Induced Curling of Concrete Roadbed along High-Speed Railway: In situ Experiment and Numerical Simulation. KSCE J Civ Eng 24, 1195–1208 (2020). https://doi.org/10.1007/s12205-020-0671-4

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  • DOI: https://doi.org/10.1007/s12205-020-0671-4

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