ABOUT

To improve the reliability of lighting fixture production and installation, we created digital models of the 22 stations on line 4 of the Paris Metro, using a “scan to BIM” process for accurate and efficient planning.

Subway stations.

55,000 m²

Digitized surface.

Survey and 3D modeling of 22 stations of subway to make the installation of lighting fixtures reliable

Context and needs

As part of a project to cover cable trays and luminaries for metro stations on line 4 in Paris, My Digital Buildings was commissioned by a design office to digitize the 22 stations concerned.The design office, responsible for the design and installation of the luminaries, needed to visualize the infrastructures in place, needed to visualize the infrastructures in place, with particular attention to the cable trays and electrical networks, which are at the heart of the project.The production of a 3D model and sectional plans of subway stations was Then essential for effectively initiate this project, by having an Overview and up to date of the infrastructures.

The challenges

The project tackled both environmental constraints and the complexity of the lighting installation. Digital models played a key role in optimizing the positioning and production of cable tray covers and luminaires. They also ensured that the proposed lighting solutions seamlessly integrated into existing technical spaces, meeting environmental standards and enhancing both design accuracy and installation efficiency.

Download the complete use case

Point cloud from a subway station.

The enacted solution

Timed Readings

Group survey operations conducted during short nights, outside of peak traffic hours.

Focus on the High Points

Particular attention to the survey of cable trays and electrical networks.

Scan to BIM process

Accurate 3D modeling based on the collected point cloud for precise digital representation

LOD 300/LOD 400 modeling

A 3D model combining these two levels of geometric details for greater accuracy.

“Using the collected point cloud, we were able to identify the exact position of the existing cable tray suspension supports, and confirm or disprove the theoretical difference between them. This allowed the design office to avoid any design error and to make the production of their parts more reliable, for which centimetric precision was required.After a pilot at a first station, highlights the importance of the survey and modeling phase, the digitization process was extended to the scale of the entire line.”

Benjamin MEHAMEDI

Chief Operating Officer

To model all of these metro stations, we followed a “scan to BIM” method. By following this process, the point cloud is used as a modeling layer directly in Revit, by being presented in the form of a section, or as a whole. Based on the point cloud, a precise and exhaustive representation of reality, makes it possible to make the production of the model reliable. Continuously during modeling, until quality control at the end of the project, the point cloud is compared to the 3D model. Thus, modeling errors and inaccuracies are greatly reduced.

The results achieved

This project will have resulted in the production of particularly technical 3D models:The structural envelope of the stations as well as the existing electrical networks were modelled at LOD300 to accurately estimate the volumes and dimensions.The equipment directly impacting the design and installation of the luminaries was modelled at LOD400 in order to provide a fine and exhaustive representation of critical infrastructures. The design and installation of luminaries and cable tray covers were modelled at LOD400 in order to provide a fine and exhaustive representation of critical infrastructures. Could be conducted without design errors, avoiding delays and additional costs.

Let's study your project together

Sales department

+33 4 85 69 3102

contact@mydigitalbuildings.com

Survey and 3D modeling of 22 stationsOf subway to make the installation of lighting fixtures reliable

Receive our customer case detailing our collaboration with RATP and the specificities of the project directly in your inbox. You will discover the overall coordination of the project, details concerning the capture protocols adopted and the production of digital models.