3D Geological Modelling and InfraBIM Interoperability: Tunnel Euralpin Lyon-Turin

In tunneling, the unpredictable geology makes it crucial to visualize and understand the interacting layers from the subsurface. Building Information Modelling (BIM) methodology, operates as an important element which enhances design accuracy and project coordination for tunnel infrastructure. It allows more optimal interactions which improve the efficiency of all services, and it plays a key role in managing risks and resources, in the project development. A 3D geological model, in tunneling, incorporates a digital representation of the underground features and properties which are crucial for planning and overseeing the project. Given the complex nature of the terrain and the subsurface, surveys and testing are of great importance to gain insight into the geological formations and their spatial distribution. The characterization, however, is often not sufficient for a comprehensive understanding of the entire excavation area. Thus, available data, geological expertise, and digital tools become crucial for constructing a reliable 3D model. This supports the tunnelling building information modelling, by delivering accurate subsurface data, optimizing the construction planning, and effectively helping with the risk management, especially during the excavation and building phases. The following thesis focuses on the development of a methodology for a 3D geological model reconstruction and its integration with a BIM model, created by diverse digital instruments. The concerning case study is from a segment of the highspeed railway tunnel project which will unite Lyon with Turin (TELT). The result is a 3D geological model which allows a better and complete visualization of the subsurface of the project and enables a simple sharing of results, which are employed for different purposes, related to the goals of the executing company (WEBUILD)