Abstract
The concrete foundation in railway tunnel settles gradually following long-term exposure to repeated loads by trains on the track. We established two foundation numerical models of a railway tunnel and their structure responses under the loads by trains and verified the methodology by field testing. With these models, we examined the relationship between the train velocity and the vertical dynamic coefficient, demonstrated that the damages in the concrete foundation resulted from fatigue damage accumulation due to repeated loads. In concrete foundations with rebar, the attenuation rate of stress was higher than those without rebar, thus having better structure responses. In conclusion, we advise to increase the reinforcement ratio of the concrete foundation of tunnel railways to improve its structure responses.
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Acknowledgments
This work has been supported by the National Natural Science Foundation of China (No. 51108472 & 51309261), the Natural Science Foundation of Guangdong Province, China (No. S2011040005172 & S2012010010446), and the Specialized Research Fund for the Doctoral Program of Higher Education of China (No. 20110171120012), these supports are gratefully acknowledged.
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Huang, L.C., Li, G. (2015). Foundation Damage Responses of Concrete Infrastructure in Railway Tunnels Under Fatigue Load. In: Lollino, G., et al. Engineering Geology for Society and Territory - Volume 6. Springer, Cham. https://doi.org/10.1007/978-3-319-09060-3_115
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DOI: https://doi.org/10.1007/978-3-319-09060-3_115
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