METHODS OF ASSEMBLING AND DISMANTLING RAIL JOINTS ON REINFORCED CONCRETE SLEEPERS

Abstract

Rail joint assembly and dismantling on reinforced concrete sleepers constitute a critical phase of track superstructure maintenance and construction. This paper examines the principal methods employed in assembling and dismantling rail connections, with particular focus on elastic clip fastenings (e-clip and Pandrol systems), insulated joints, and bolted fishplate connections used with prestressed concrete sleepers. A comparative field study was conducted on three operational track sections of the Uzbekistan Railways network between 2021 and 2023. Key performance indicators including assembly time, fastening torque consistency, joint gap tolerance, and post-dismantling component reusability were measured and analysed. Results indicate that mechanised assembly using hydraulic torque wrenches reduces installation time by 42% and improves torque consistency by 31% compared to manual methods. Elastic clip systems demonstrated a 28% higher reusability rate after dismantling versus conventional bolted joints. Standardised dismantling procedures significantly reduced component damage during removal. These findings provide evidence-based guidance for railway maintenance engineers seeking to optimise track assembly workflows and reduce life-cycle costs.