Abstract:

The diameter of the segment rings of Metro tunnels in China is usually 6 m. Due to the different segment ring divisions in different cities in China, the thrust systems of shields have to be reformed. In the paper, an optimized layout of thrust cylinders fitting for both 2 segment ring divisions (22.5° division and 36° division) is designed. In this way, the applicability of shields to different segment ring divisions is improved, and the cost and time needed to reform the shields are minimized. The paper can provide reference for the control of equipment cost of similar Metro works in the future.

Key words: shield, segment, key segment, segment ring division, thrust system