1999 Volume 9 Pages 301-306
Roppongi station in Metropolitan Subway Route No.12 was constructed as vertical twin tunnels. The lining structure used this shield method is formed out of specific segments. We executed the field measurement concerning the lining structure. In this measurement, we chiefly paid attention to grasp the following, 1, earth pressure for the lining structure. 2, influence of the lower tunnel on the upper shield excavation. 3, influence on lining structure when the temporary pillars were removed. As a result of the measurement, it was confirmed that this lining structure was safe concerning the behavior. In this paper, the result of the field measurement was described.
