Analysis Of Rail Selection For Urban Rail Transit

Rail plays a vital role in urban rail transit, and its performance must meet the following requirements:

1. High strength: Rail must have excellent bending, fatigue, tensile and compressive strength to withstand various loads during train operation.

2. Wear and corrosion resistance: In view of the operating environment of urban rail transit lines, rails must have excellent wear and corrosion resistance to ensure stability under long-term use.

3. Safety: Rail must be able to properly handle problems such as thermal expansion and contraction to prevent safety accidents such as line jump or breakage.

I. Main models of domestic and imported rails

1. Domestic rails

Domestic rails are mainly 60, 50, 45, 38 and other models. Among them, 60 rails are widely used in domestic urban rail transit lines due to their excellent performance and long service life.

2. Imported rails

Imported rails mainly use international standard models, such as 50, 49E1, etc. These rails, with their high hardness and excellent wear resistance and durability, occupy an important position in urban rail lines with high-speed and high-quality requirements.

3. Rail selection and application
The selection of rails for urban rail lines needs to be comprehensively considered according to the specific needs of the project and environmental conditions. At present, the 60-type rails in the domestic market have become the mainstream choice due to their excellent comprehensive performance and wide applicability. However, in specific scenarios, such as high-speed operation or extreme environmental conditions, the superior performance of imported rails may be more suitable.

With the continuous development of urban rail transit, the selection and research and development of rails will continue to advance to meet the growing performance requirements and safety standards.