Subway station for large-diameter shield tunnel construction of pile arch wall supporting and expanding excavation

The utility model relates to a subway station for large-diameter shield tunnel construction of pile arch wall supporting and expanding excavation. The subway station comprises a tunnel, a bottom longitudinal beam, a middle partition wall, a top longitudinal beam, a top pipe piece, a bottom pipe piece, side pilot tunnels, a station structure initial lining, a middle pilot tunnel top arch initial lining, an arch portion second lining structure, a bottom plate, side wall second lining concrete and a station plate. The bottom longitudinal beam, the middle partition wall and the top longitudinal wall are sequentially cast between the bottom pipe piece and the top pipe piece from bottom to top. The top pipe piece and the bottom pipe piece are arranged on the top and bottom of a tunnel. The side pilot tunnels are located on the left and right sides of the tunnel. The station structure initial lining is connected with the middle pilot tunnel top arch initial lining. The arch second lining structure is arranged on the inner side of the station structure initial lining and the inner side of the middle pilot tunnel top arch initial lining. The bottom plate is cast at the bottom of the tunnel and the bottoms of the side pilot tunnels. The side wall second lining concrete is cast on the side walls of the side pilot tunnels. The station plate is cast on the bottom plate and the side wall second lining concrete. The subway station has the advantages of being good in structural strength and convenient to construct, shortening the construction cycle, and the like.