An evaluation of primary lining deformation using measurements with FBG sensors during a tunnel excavation

Authors

  • Jan Záleský Czech Technical University in Prague, Faculty of Civil Engineering, Department of Geotechnics, Thákurova 7/2077, 166 29 Prague 6 – Dejvice, Czech Republic
  • Petr Mayer Czech Technical University in Prague, Faculty of Civil Engineering, Department of Mathematics, Thákurova 7/2077, 166 29 Prague 6 – Dejvice, Czech Republic
  • Michal Beneš Czech Technical University in Prague, Faculty of Civil Engineering, Department of Mathematics, Thákurova 7/2077, 166 29 Prague 6 – Dejvice, Czech Republic
  • Jiří Barták Czech Technical University in Prague, Faculty of Civil Engineering, Department of Geotechnics, Thákurova 7/2077, 166 29 Prague 6 – Dejvice, Czech Republic
  • Jan Pruška Czech Technical University in Prague, Faculty of Civil Engineering, Department of Geotechnics, Thákurova 7/2077, 166 29 Prague 6 – Dejvice, Czech Republic
  • Marek Záleský SG Geotechnika a.s., Geologická 988/4, 152 00 Prague 5 – Hlubočepy, Czech Republic
  • Zdeněk Sekyra SG Geotechnika a.s., Geologická 988/4, 152 00 Prague 5 – Hlubočepy, Czech Republic
  • Monika Lidmilová SG Geotechnika a.s., Geologická 988/4, 152 00 Prague 5 – Hlubočepy, Czech Republic
  • Ladislav Šašek SAFIBRA, s.r.o., U Sanitasu 1621, 251 01 Říčany

DOI:

https://doi.org/10.14311/APP.2026.56.0046

Keywords:

geotechnical monitoring, underground structures, primary lining, fibre optics Fiber Bragg Gratings

Abstract

The paper presents an evaluation of data gathered with the FBG (Fiber Bragg Gratings) instrument for primary lining deformation measurement, which was installed into primary lining of adit during construction. The evaluation is related to the initial shape of primary lining, and its deflection curve is computed. Definition of appropriate boundary conditions can be verified with the use of geodetic convergence monitoring results. The developed evaluation procedure can be used also for determination of Bragg wavelengths during the design of primary lining monitoring.

Downloads

Download data is not yet available.

Downloads

Published

2026-02-20

Issue

Vol. 56 (2026): 51st and 52nd Conference Foundation Engineering Brno 2023 and 2024

Section

Articles

License

Copyright (c) 2026 Jan Záleský, Petr Mayer, Michal Beneš, Jiří Barták, Jan Pruška, Marek Záleský, Zdeněk Sekyra, Monika Lidmilová, Ladislav Šašek

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

Záleský, J., Mayer, P., Beneš, M., Barták, J., Pruška, J., Záleský, M., Sekyra, Z., Lidmilová, M., & Šašek, L. (2026). An evaluation of primary lining deformation using measurements with FBG sensors during a tunnel excavation. Acta Polytechnica CTU Proceedings, 56, 46-51. https://doi.org/10.14311/APP.2026.56.0046