Investigation of textile reinforced concrete in tunnel linings

Abstract

This thesis investigates the feasibility and potential advantages of using textile re inforced concrete (TRC) in tunnel linings compared to conventional steel reinforced concrete (RC). The study evaluates structural performance, durability, and environ mental impact by combining a detailed literature review with a case study involving finite element modelling of a tunnel lining. By designing a cross-section for each material, a structural comparison of RC and TRC lining was made, as well as a comparison of CO2 -eq emission. TRC, utilizing non-corrosive carbon fibre meshes and high-strength fine-grained concrete, allows for significantly thinner structural elements due to the elimination of concrete cover requirements. Findings of this thesis indicate that TRC linings can achieve equivalent structural performance with reduced material usage and environmental impact. However, limitations regarding fire resistance, especially concerning the behaviour of resin-impregnated textiles un der high temperatures, highlight the need for further research. The thesis concludes that TRC is a promising alternative for tunnel lining applications, particularly in non-load-bearing scenarios or where design flexibility and sustainability are prioritized.