Formwork device for forming inner wall, has arch shaped distribution conduits regularly distributed in direction of extension or depth of tunnel and interposed and connected between access openings and flexible pipe

摘要

The device has arch shaped distribution conduits interposed and connected between access openings and a flexible pipe (38a). The conduits are regularly distributed in the direction of the extension or the depth of a tunnel (11). The conduits distribute liquid or semi-liquid masonry material, and are erected facing formwork units (42), along and at distance from metallic partitions (20, 24, 25) that internally bound a confinement space.