Getting the job done with pin-point accuracy.

The 1.2 km long section of the new road with several tight bends serves to bypass the village of St. Leon-Rot near Heidelberg, reducing the amount of through traffic. Among golf players, the village is known for its golf course, which hosted the “Deutsche Bank / SAP Open” from 1999 to 2002 and has also repeatedly been a venue for the European Golf Championship.

Using the NAVITRONIC® Plus control system was just the right solution on this section of the new road because – as is the case for most new construction projects – the design data were available in digital form. The 3D control system from Vögele can use these design data, thus dispensing with the need for time-consuming surveying and preparation work that is typical of levelling with stringlines. The economic efficiency of the entire project was increased considerably as a result.

The Super 1900-2 enabled the entire carriageway to be paved at widths between 7.60 m and 7.80 m in one single working pass. Because of the large working width, two receivers were mounted at the left and right screed arms respectively to establish the screed’s position, as well as grade and slope. Tight bends with radii of merely 400 m and varying cross-sections with slopes of up to 8% posed a particular challenge in this construction project. The steering operation was also governed by the NAVITRONIC® Plus system.

For control of the paving operation, NAVITRONIC® Plus requires the digital design data to be stored in a system computer on the paver. During the paving operation, a positioning system determines the current position of the screed with pin-point accuracy. The NAVITRONIC® Plus system continuously matches the measured results with the design data. As soon as the system identifies any deviation, the system computer automatically forwards the commands to adjust the paver’s steering and height adjustment.

The automatic system enabled the paver operator to fully focus on the paving operation and feeding of the paver with asphalt mix. There was not one single situation that required manual intervention into the paver’s automatic steering function. The screed operator needed to merely keep an open eye on the paving results, as both the paving width and the grade and slope were controlled fully automatically by the 3D system.

Job site: bypass L546 near St. Leon-Rot
Project length: 1.2 km
Bend radius: up to 400 m
Cross slope: up to 8%
Material (base layer): bitumen-coated gravel
Width: 7.60 m - 7.80 m
Layer thickness (base layer): 12 - 16 cm
Paving speed: 3.5 m/min
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