Investigate the detection rate of defects in concrete lining using infrared-thermography method

Alireza Afshani Mehrabad, Hirokazu Akaki, Shinji Konishi

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    By aging of the tunnels with concrete lining, their cracks and defections are also increasing. In old tunnels, spalling becomes a common danger for passing vehicles and trains and frequent monitoring and health check of the concrete lining surface become necessary. Among the non-destructive methods to detect the defects in the tunnel, application of Infrared thermography in tunneling is a relatively new attempt. This study investigates infrared thermography application on the damaged concrete lining of tunnels. The thermal field data of tunnel air temperature and the surface temperature of damaged and undamaged part of several defected lining segments of a tunneling case collected. A thermal numerical model is employed to simulate heat transfer mechanics in this site using the field measurement data. In numerical analysis, convection, conduction, and radiation heat transfer mechanics were taken into consideration and then verified with the field data. The model is used to investigate the influence of temperature differences between damaged and undamaged concrete surface, and also temperature difference between tunnel air and the concrete surface on detection rate of defects.

    Original languageEnglish
    Title of host publicationProceedings of the 7th China-Japan Geotechnical Symposium
    Subtitle of host publicationNew Advances in Geotechnical Engineering, CJGS 2018
    PublisherChina Communications Press Co., Ltd.
    Pages1-5
    Number of pages5
    Volume2018-March
    ISBN (Electronic)9787114139567
    Publication statusPublished - 2018 Jan 1
    Event7th China-Japan Geotechnical Symposium: New Advances in Geotechnical Engineering, CJGS 2018 - Sanya, China
    Duration: 2018 Mar 162018 Mar 18

    Other

    Other7th China-Japan Geotechnical Symposium: New Advances in Geotechnical Engineering, CJGS 2018
    CountryChina
    CitySanya
    Period18/3/1618/3/18

    Keywords

    • Concrete defects
    • Heat transfer
    • Infrared thermography

    ASJC Scopus subject areas

    • Geotechnical Engineering and Engineering Geology

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  • Cite this

    Afshani Mehrabad, A., Akaki, H., & Konishi, S. (2018). Investigate the detection rate of defects in concrete lining using infrared-thermography method. In Proceedings of the 7th China-Japan Geotechnical Symposium: New Advances in Geotechnical Engineering, CJGS 2018 (Vol. 2018-March, pp. 1-5). China Communications Press Co., Ltd..