IN THE FOUNDATION SLABS OF TUNNEL-TYPE UNDERPASSES APPLICATION OF NON-METALLIC COMPOSITE REINFORCEMENT

Abstract

The development of the construction industry at the current stage requires the introduction of new high-performance materials into production, and developers are seeking to reduce construction costs without losing the reliability and durability of structures. In today's global practice, composite non-metallic reinforcement is becoming increasingly widely used alongside traditional metal reinforcement. To date, structures using non-metallic composite reinforcement have not yet stood the test of time. Accordingly, this issue requires further study. In this article, a variant design of the foundation slab of a tunnel-type underpass is presented. In the first variant, steel reinforcement is used, and in the second - non-metallic composite reinforcement. The modelling and static calculation of this structure was carried out in the environment of the МОНОМАХ software package. An economic comparison of reinforcement options was carried out. According to the results of the analysis of scientific and technical literature, as well as on the basis of the calculations performed, preference is given to composite reinforcement when reinforcing the foundation slabs of tunnel-type structures. The material savings for the use of non-metallic composite reinforcement in the foundation slab amounted to 19.4% compared to the option of reinforcement with classical steel reinforcement. Further research is planned on the use of composite reinforcement in other structural elements, due to the fact that the elastic modulus of composite reinforcement is lower than that of steel reinforcement.