A sleeper beam that is directly connected to the steel rails of a subway line. Reinforced concrete is commonly used as a sleeper material.

The following is an introduction to the characteristics of subway sleeper engineering:

1. Due to the long construction time span, winter cold construction and summer high temperature construction, different measures must be taken during concrete pouring construction to ensure construction quality.

2. The construction of track engineering requires the laying of seamless tracks at once, and the standard speed for passing inspection is to reach 80km/h. The track needs to have high smoothness and stability, and the construction technology requirements are very high.

3. The construction progress of offline units is inconsistent, with a total of 12 construction breakpoints, and the length of the construction breakpoints is between 200 and 400 meters, resulting in the inability to continue the construction of the track project. Only construction tools and mechanical equipment can be transported after segmented construction.