Abstract
This paper develops a theoretical model to predict the service life of concrete pipelines in contaminated soils. The service life of concrete pipeline is divided into four stages: the chloride ion diffusion stage, the initial corrosive stress generation stage, the initial crack generation stage and the crack propagation stage. For the first stage, the equation for chloride diffusion is formulated and solved analytically by using the integral transform method. For the other stages, the concrete around a corroding steel reinforcing bar is modeled by a thick-walled cylinder with a wall thickness be equal to the thinnest concrete cover. The concrete pipeline is supposed to reach the end of service life when the crack width exceeds the maximum allowable value at the limit state. The proposed model is validated by comparing the predictions with the numerical simulation results. The analysis results demonstrate that the soil pressure and the concrete cover thickness have significant effects on the service life of concrete pipelines exposed to the chloride contaminated soils.
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Acknowledgements
This study was financially supported by the National Natural Science Foundation of China (Grant No. 41772290).
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Li, J., Wang, H., Li, L. (2018). Service Life Prediction of Underground Concrete Pipeline in Chloride Contaminated Soils. In: Shi, X., Liu, Z., Liu, J. (eds) Proceedings of GeoShanghai 2018 International Conference: Transportation Geotechnics and Pavement Engineering. GSIC 2018. Springer, Singapore. https://doi.org/10.1007/978-981-13-0011-0_3
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DOI: https://doi.org/10.1007/978-981-13-0011-0_3
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