TY - GEN
T1 - Investigate the detection rate of defects in concrete lining using infrared-thermography method
AU - Afshani, Alireza
AU - Akagi, Hirokazu
AU - Konishi, Shinji
N1 - Publisher Copyright:
© 2018 China Communications Press Co. Ltd. All rights reserved.
PY - 2018
Y1 - 2018
N2 - 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.
AB - 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.
KW - Concrete defects
KW - Heat transfer
KW - Infrared thermography
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M3 - Conference contribution
AN - SCOPUS:85048987585
T3 - Proceedings of the 7th China-Japan Geotechnical Symposium: New Advances in Geotechnical Engineering, CJGS 2018
SP - 1
EP - 5
BT - Proceedings of the 7th China-Japan Geotechnical Symposium
A2 - Zhang, Jian-Min
A2 - Kikuchi, Yoshiaki
PB - China Communications Press Co., Ltd.
T2 - 7th China-Japan Geotechnical Symposium: New Advances in Geotechnical Engineering, CJGS 2018
Y2 - 16 March 2018 through 18 March 2018
ER -