Application of Concrete Rail Sleeper
In comparison to global usage of reinforced concrete sleepers, China employs them extensively. Reinforced concrete sleepers offer numerous advantages over wood sleepers, including abundant resources, extended lifespan, enhanced stability, and reduced maintenance requirements. However, despite these benefits, reinforced concrete sleepers present several drawbacks and challenges in production and application due to factors such as raw materials, manufacturing processes, structural design, installation methods, and environmental factors.
Cracking represents the most prevalent and significant issue encountered with reinforced concrete sleepers. Various types of cracks occur, including positive moment cracks beneath the rail, positive and negative moment cracks within the sleeper's center, vertical and horizontal cracks near bolt holes on the upper surface, as well as longitudinal cracks at the ends and center of the sleeper. Among these, longitudinal cracking poses the most severe concern. When cracks surpass the failure threshold of reinforced concrete sleepers, they necessitate replacement along the railway line.
However, replacing a sleeper entails labor-intensive loading and unloading tasks, transportation logistics, and installation efforts. This process consumes considerable manpower and resources while occasionally disrupting normal train operations. The associated costs typically range from four to five times higher than the cost of the sleeper itself.
