MOVABLE SHOVE FRAME STRUCTURE, DEVICE FOR STARTING TUNNELS AND METHOD FOR STARTING THE CONSTRUCTION OF TUNNELS

摘要

Movable shove frame structure, device for starting tunnels and method for starting the construction of tunnels. The movable shove frame structure (1) comprises:- a shove frame (2) that comprises support legs (3),- a shove ring (4) and- a thrust ring (5) placed between the shove frame (2) and the shove ring (4),- a gliding element (6) under each support leg (3) of the shove frame (2) and- removable fixing means (7) to anchor the support legs (3) to the floor (8).;The method for making tunnels uses the device for starting tunnels and comprises a starting position, an advancement or pushing step, pulling steps, a cyclical repetition of pushing and pulling steps and a final step.