Analysis of Permanent Lining of Branisko Tunnel

Abstract:

Structural layouts of the tunnel concrete linings are dictated by various factors; to name the most influential ones: geology and hydrological conditions, overburden depth, size and shape of the tunnel and the method of excavation and support. Varying tunnel lining thicknesses and loading conditions, imposed by the above factors, require multiple computations to represent typical and critical cross sections and which are relevant for the structural designs. In contrast to the temporary (primary) lining, where some failures of the lining can be tolerated and may be used in the lining design, a permanent concrete lining has to be designed for a maintenance-free life of 50 or more years. Consequently, all the loads that may occur during the operational life of the tunnel have to be taken into account. This article deals with analysis of the geotechnical monitoring results from the Branisko tunnel which was carried out during 2003 – 2013. One part of geotechnical monitoring was checking of cracks which were created during construction of the permanent lining. Measured data are utilized for comparison of static calculations of the supposed load cases of permanent lining with real state of stresses. The static analysis has been performed in two different models developed for different static patterns.

• Periodical: Key Engineering Materials (Volume 738)
• Pages: 249-260
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.738.249
• Online since: June 2017
• Authors: Jana Chabronova*, Marek Bednar, Jan Snopko
• Keywords: Cracks in Lining, Geotechnical Monitoring, Permanent Lining, Static Calculation

References

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DOI: 10.4028/www.scientific.net/kem.738.249

[7] J. Snopko, M. Bednar, Technical Report of Evaluation Long-term Measurement of Branisko Tunnel Final Lining, Tarosi Construction & Consulting Company, Bratislava, Slovakia, (2016).