Device and method for excavating and concreting a dome roof in the excavation of a tunnel

摘要

Device for excavating and concreting a dome roof in unstable ground, especially for making tunnel constructions of large cross-section, a permanent support providing the slot in the dome, movable in the direction of the drilling, which is formed by permanent support units arranged in a row, characterised in that, with the support units movable, a front shuttering wall (18) is coupled at the back, which wall can be moved with respect to the support units in the direction of the drilling, by means of front shuttering cylinders (20, 21).