mobile bridge sviluppabile, including more cooperating partners, act to perform in a tunnel under construction, the loading of the mines, the fastening of the arches.the pose of the networks and any other manual intervention, which should be carried out in proportion.

摘要

An extensible bridge assembly is disclosed for performing, in a tunnel being built, tunnel building operations such as the loading of mines, affixing of reinforcing ribs, laying of nets and the like. This extensible bridge assembly essentially comprises a bridge frame (1), affixed to a truck, on the chassis (3) of which there are articulated two raising arms (12, 17), bearing a counter-platform (18) which, in turn, supports a platform (21) provided with legs (30). These component parts, in particular, comprise piston oleodinamic systems (14, 23, 30) to drive the component parts in an independent way from one another. The truck is substantially used both as a stabilizing ballast, for stabilizing a bridge assembly being extended, and as a transport means, to be used as the bridge assembly is closed and the stabilizer elements (5) raised.