Fiberglass Coating of Railway Culvert Pipes

Abstract

The culvert pipes in the railway roadbeds are an important element of the infrastructure. The pipes are subjected to chemical and electrochemical attack, the influence of frost and groundwater. Aggressive medium causes a negative change in a concrete structure and metal and results in pipe destruction. A glass-reinforced plastic band is proposed for internal and external protection of the pipes. The pipe construction, known as “pipe-in-pipe”, has been obtained by the winding of the outer fiberglass layers at an angle of 45° to the longitudinal direction of the pipe. Then the pipe samples have been placed on a test stand to determine the presence of deformations. The experimental results showed that the glass-reinforced plastic band possesses the necessary physical and mechanical properties. It can be used for spiral reinforcement of the pressure concrete pipes instead of metal reinforcement. Replacement of steel reinforcement with fiberglass allows creating a pipe design for laying in the places with increased corrosive effects of groundwater, as well as in soils with a significant value of leakage currents and stray currents.