Analýza teplotního zatížení definitivního ostění tunelových staveb

Abstract

This dissertation thesis deals with the design and loading of the final tunnel lining by temperature influences. Periodic stress changes in tunnel linings caused by the temperature fluctuations in the tunnels can act as a very significant factor in the design of the whole work. In countries like the Czech Republic, with four seasons characterized by different temperatures as well as temperature variations during the day, this phenomenon cannot be ignored and must be included in the proposal when assessing lifetime of the tunnel lining. One of the main reasons for concentrating on the issue of the final lining load is the absence of applicable national standards or regulations. The work focuses on both the theoretical and practical part. Influence of the measured results was verified through mathematical modelling using the finite element method. There was used a planar and a spatial model. The theoretical part summarizes the general knowledge about the construction and function of the final lining and a type of the load. In the practical part there are collected measurements of the Klimkovice tunnel where a continuous monitoring of the behavior of the final lining was installed. These data are very rare and quite unique. The results of the measurements determined the final lining load and a process of the temperature gradient. These results have been entered in the calculations and compared with the German railway Directive. The final part of this thesis takes a recommendation for thermal load on the final tunnel lining. This recommendation is based on the results of long-term measurement and computational analysis.