Improvements to patent 9301380 for universal equipment for constructing preliminary vaults and complementary works in underground excavations

摘要

The equipment according to the improvements includes a general gantry (portal) 1 in the form of an arch supported by longitudinal joists 2 associated with adjustable support elements 4. Two sets of carriages 5 with respective drilling heads 9 mounted on uprights 8 move over the gantry 1, the assemblies 5 moving over each one of the halves of the gantry 1. The equipment includes an auxiliary gantry 10 with an oscillating support 11 for support and guiding of the upright 8, also including a transfer system formed by two sets of caterpillar tracks 29 fixed to the actual longitudinal beams 2. The equipment also includes two oleo-dynamic power units for actuation, which are mounted on the same longitudinal beams 2. IMAGE