It is one of the most complex infrastructure projects in Switzerland: 2022 sees the opening of the third bore of the Gubrist tunnel, 3.2 km long, as part of Zurich's northern by-pass. With a diameter of 16 m, it is the largest tunnel bore in the country and is intended to relieve the chronic congestion of this section of road by providing three extra carriageways towards St. Gallen/Bern. The demands on the road construction process were correspondingly high: despite the complex tunnel logistics, parallel working and heavy traffic, approximately 20,000 t asphalt had to be paved within a tight schedule and meet stringent quality standards. This was why contractor Marti AG Solothurn Bauunternehmung decided to approach the project using a digital road construction solution. “As one of the largest contractors in Switzerland, the Marti Group has been active in driving digitalisation in all areas of construction for years - from structural to civil engineering. For a project of this scale, it was obvious that we should use a solution which enables us not only to visualise planning digitally, but also to control job site processes actively,” says Cedric Berrut, civil engineering operations manager.
Networked system solution from the paver manufacturer
VÖGELE’s WITOS Paving Plus product was the one selected. This software-based process optimisation solution networks all those involved in the project from the construction manager to the mixing plant manager to the paving supervisor and on to the paver operator and consists of a total of five modules: these allow job site planning, provision of mix, transport of mix, asphalt paving and subsequent process analysis to be managed by one single system in real time. Among other things, this facilitates just-in-time delivery to the site and continuous paving with no paver stoppages. The paving team can react specifically to disruptions to the process. “One advantage from our point of view is that as an integrated solution from the manufacturer of the machine, WITOS Paving Plus matches the paver perfectly,” adds Berrut. “This gives us immediate access to all the machine data.”