3D digital control systems
One of the newest advanced methods in road building is digital automatic control system for machinery using 3D leveling system control during the erection of the road bed embankment, construction of the pavement layers and scraping of the asphalt-concrete layer. Since 2006 JSC “Road Service of the Republic of Tatarstan”, and later JSC “Tatavtodor”, successfully use 3D automatic systems by Leica, Trimble and Topcon.
The system is based upon digital model of the road surface. The digital model is loaded into the computer on board the road-building machine. A special position control system tracks the building machine on the site, defining the location, height and angle of the work tool and adjusts its location according to the design point. Thus, this technology allows doing all kinds of road building works of formation of vertical and transition curves, raised curves and other elements with pin-point precision and not using lining wire. It also allows increasing performance, cutting down construction time and material consumption and facilitating works during night time. Currently, JSC “Tatavtodor” has 31 3D leveling systems on НВМ, VOLVO, CATERPILLAR motor graders, WIRTGEN road scrapers and KOMATSU and CATERPILLAR bulldozers.