Within the framework of the extension of Line B Lyon subway, Egis is supporting SYTRAL in partnership with Systra, AZC and Atelier Schall. The project consists of extending the current subway line by 2.5 km, building two new stops as far as the Southern Hospitals, adding an emergency/ventilation shaft, building a 900-space Park & Ride facility, adding storage tracks and installing a cleaning facility for the trains.
Egis' BIM approach
Like all major infrastructure projects, the success depends on the ability of players from a wide range of backgrounds to understand each other and to combine the very strong constraints of each of the trades involved in this project: tunnelling, smoke extraction and ventilation, low-voltage systems, drainage and water collection, railways, etc.
Egis is in charge of the BIM management for SYTRAL (Building Information Modeling) on this project. Since 2018, the company has involved all Construction companies in this new approach including the implementation of Bimsync.
The pillars of this approach
Bimsync was set up at the beginning of the construction phase. Thanks to the cloud, all the actors involved in the project can visualize the models by themselves, contribute with their own elements, and collaborate around them.
The organization and structuring of the information allowed all the participants to easily find their way through the 250 or so models that make up the digital model of the subway extension.
Bimsync allows the project members to communicate via open formats, i.e. IFC (Industry Foundation Classes) and BCF (BIM Collaboration Format). Those open standards are a common language and allow all the participants to discuss around a clear common language. As this is a public infrastructure, this orientation has made it possible to put all the players on an equal footing, regardless of the design software used in their organisations (allplan, revit, etc.), in compliance with the rules of public sector.
And finally, the definition of targeted uses shared with all the participants. Among these different objectives (see below), it was first of all the improvement of the technical and spatial coordination of the participants ("synthesis" mission) that was targeted and which then served as a lever for other uses.
