structure for the construction of tunnels and tunnel suitable for pushing and carrying machine or is willing to cut and laperforazione of rocks and to carry and place the elementthe implementing the armor and tapping

摘要

is the subject of this found a new backbone elements of work and camber.suitable for implementing tunnels and tunnel and the corresponding means to push for the equipment that need during the cutting and drilling rocks.it was designed to improve the working conditions of those who today must assist the machines used for the drilling of a tunnel during the construction of arches.for the initiation and continuation of the work; for the execution set of bindings.