Orderer Tokyo Metropolitan Subway Construction Co., Ltd.
Completion 2000
Structure and scale Slurry type MF shield method, outer longitudinal diameter: φ8.8m; outer lateral diameter: φ17.4m; finishing internal diameter:φ16.1m; tunnel length: 275m
Location Tokyo Metropolis
Application Railway tunnel

The triple circular-face shield (creased-type) station shield method was applied for the first time in the world to build the platform section of Iidabashi Station on the Tokyo Metro Toei Oedo Line. It was possible to minimize the excavation cross-section by using the MF shield method.