2003 Volume 13 Pages 389-394
In the Central Circular Shinjuku Route of Tokyo Metropolitan Expressway, the “Cut-and-cover and cut-and-open method for shield tunnels” is fully applied for the construction of its ramps andjunction sections. This method is executed as follows; 1) Two parallel shield tunnels are constructed independently. 2) The ramps or junction sections are constructed by connecting between the RC frame bodies of the sectionsand the partially removed steel segmental linings of the two tunnels.
In the following text, we report on the outlines of the “Cut-and-cover and cut-and-open method for shield tunnels” and of the design method for steel segmental linings of the two tunnels.
