The GTF system was initially designed to meet a specific application need, but then evolved into a technologically advanced and complex solution: a totally unique system for milling and grinding.
Grotti srl provides an innovative solution for milling concrete surfaces inside tunnels of any type. Thanks to continuous development, the company has made this technology highly effective also for the excavation of natural tunnels and excavation faces with smaller dimensions.
The challenge was to design a mid-sized machine easily transportable that would offer power and robustness while being suited for a range of specific applications. For the machine to achieve productivity and precision, two fundamental factors were immediately taken into account: a specially designed hydraulic system and electronic system.
Today, the GTF system is installed on three different machines: the GTF200 RC, the GTF400 RC and the GTF600 RC, all tracked, radio-controlled and fitted with a telescopic boom. The three models differ from each other in weight, size and hydraulic capacity, but all feature a hydraulic system designed and built by Grotti srl in the company’s workshop. The fleet was recently added with the GTF250 RC, which maintains the characteristics of the other models but is mounted on a modified truck that functions in automatic mode without operator.
The GTF system enables this high-productivity attachment to perform milling and cutting of concrete in tunnels and other types of structures, but it is also very effective and productive for excavation of small tunnels where rock masses have a high compressive strength (up to 180 MPa).
The attachment is mounted on a telescopic boom that adapts itself to small and large tunnels depending on the configuration. Though it was designed for use in underground works, the GTF technology is very efficient for a wide set of above ground applications too.
The precision of the excavation depth and the movements of the boom, combined with the exceptional hydraulic flow rate that maximizes the attachment’s kW power, deliver a solution that assures levels of productivity not found in similar attachments.
As demonstrated in dozens of projects, the use of GTF technology leads to a higher profitability of the job site, since it reduces time, improves precision and in the case of milling, makes it possible to achieve uniform, high-grip surfaces, characteristics that translate into substantial savings in the quantity of materials utilized and a greater durability of the final result.
Our biggest effort put in the design was to guarantee reliability and productivity. That’s because we were aware that, especially with tunnels, all components are subject to significant stresses (vibrations, high temperatures, dust, etc.) making the strength of the components a top priority. Strenuous tests and above all, dozens of jobs successfully completed both in Italy and across the borders, have proven us right.
GTF assures modularity thanks to the possibility of switching structural components (undercarriage, turret and boom).
Safety is another aspect where the GTF system offers solid advantages; the operator is not exposed to risks related to the job site or the operation of the machine since a sophisticated radio control system allows him to command it from a distance and if necessary, to monitor the work in progress via a high resolution video system installed in an equipped van.