Abstract: To study the prefabricated structure force of the assembled station entrance ring frame and develop a theoretical foundation for the design of the entrance and exit ring frame, the load modes of the prefabricated ring frame of a prefabricated station are analyzed from construction to usage. The stress properties of the ring frame structure are examined utilizing the finite element method from the construction and installation stage to the backfilling stage toward the completion stage of the entrance and exit. Furthermore, it is observed that after joint grouting, the concave and convex tenon grooves between the prefabricated ring frame structure and roof structure generates a whole along longitudinal direction of the station, which is beneficial to the ring frames′ stress. Meanwhile, in the soil covering stage and longterm usage stage, the prefabricated ring frame structure and roof generate a whole to collectively resist the various loads, which can meet the requirements of the assembled station construction and the overall force requirements of the station structure in advanced stages. Finally, a safety reserve method is provided for constructing temporary steel support, and the structural stress is examined to ensure the safety and reliability of the continuous assembly of the entrance and exit rings.

Key words: prefabricated station, prefabricated structure of entrance and exit ring frames, structural mechanical properties, loadpattern, finite element method, increment method