CIM at the heart of the Charenton-Bercy project with MBAcity and Bouygues Immobilier - Interview
At the gates of Paris on the territory of Charenton-le-Pont (94), the Charenton-Bercy zone, of nearly 12 hectares, is an emblematic transformation project of Greater Paris led by Bouygues Immobilier / UrbanEra with major challenges.
Omri GALRON, architect trained in BIM by the CNAM and collaborator of MBAcity since 2017, takes part in the project as CIM Manager. MBAcity, a recognized player and specialist in digital transition and BIM in France, works alongside Bouygues Immobilier / UrbanEra as AMO CIM Manager with the mission of coordinating the BIM Managers of the 17 lots in Charenton-Bercy as well as producing the specifications CIM / BIM.
Nicolas BOURRAS, Technical Manager for Project Management within Bouygues Immobilier, is in charge of the infrastructure works of Phase 1 of the ZAC Charenton-Bercy (parking lot, logistics service, energy networks, resilience, etc.) as well as the general coordination of the 17 real estate development lots.
Nicolas, can you tell us about the Charenton-Bercy project?
In 2018, Bouygues Immobilier / UrbanEra won the “Inventons la Métropole du Grand Paris” competition, the largest call for architectural and urban planning projects in Europe, for the Charenton-Bercy site. The project fits into the perimeter of the ZAC Charenton-Bercy being created, for which the developer is Grand Paris Aménagement.
The ZAC program provides for the creation of approximately 400 m² SDP, 000% dedicated to economic activity (offices, shops and hotels) and 60% to living spaces (more than 40 housing units of which 1% social housing, specialized student and senior residences, a nursery, a school group), all offering numerous public and private green spaces. Phase 000 represents a mixed program of approximately 30 m² SDP.
The site is currently surrounded by the railway axes of the Gare de Lyon and motorways, but it presents an exceptional metropolitan profile between the Seine and the Bois de Vincennes, neighbor of the 12th arrondissement of Paris and flagship facilities of Paris such as the Parc de Bercy, the cours Saint-Emilion or even Bercy-Village. Its proximity to metro line 8 and direct road connections to the A4, the ring road and the boulevards des Maréchaux via the Paris Bercy interchange will be maintained; they will be supplemented by a dedicated bus line which will join the line. metro 14 and by a footbridge spanning the railway line dedicated to soft mobility.
Its topography and direct proximity to the capital make it an ideal pilot site for challenging new uses in BIM and Smart City urban redevelopment, which are at the heart of Bouygues Immobilier's strategy.
Our objectives: restore urban continuity and offer an exemplary living environment to current and future residents.
What is your vision and your ambition for this project?
Complex by its scale and its challenges (it represents 10% of the territory of the city of Charenton-le-Pont), the Charenton-Bercy project requires us all to be efficient.
We consider the use of the digital model, and more generally the CIM / BIM approach, as an opportunity to serve our environmental, architectural, technical, economic and organizational ambitions.
The anticipation of collaborative methods has made it possible to concentrate our efforts on the substance (urban and programmatic issues, alternative scenarios, global approach…) and not on the form (organization of exchanges, sharing and taking into account of information…). The progress of the operation has thus become more responsive and efficient, with immediate availability of the information compiled for decision-making.
The CIM digital model allows us to manage the interfaces between Lots, to prevent oversights or duplications relating to service limits, often a source of additional costs during construction work. It is also the support for the strategic reflections of the Contracting Authority (phasing, sub-phasing, cross-functional operation at the scale of Phase 1, etc.) and becomes a framework for the design of the project managers which includes all the parameters and input data of the existing site. The CIM digital model is a powerful medium for exchange with our external partners who “visualize” the project and its progress.
Omri, what is the CIM approach in place? How is it innovative?
MBAcity was selected alongside UrbanEra / Bouygues Immobilier, as AMO CIM manager for Phase 1 of this mixed project.
Phase 1 of the project, the land of which represents more than 6 hectares, is divided into several urban development and property development sub-projects called Lots. MBAcity's BIM teams will therefore be tasked with structuring and coordinating BIM processes and ensuring CIM cohesion for the 17 lots concerned.
The use of the digital model as a tool and support for the operation of structures after their delivery is one of the fundamental objectives set by Bouygues Immobilier / UrbanEra in its charter and its CIM / BIM specifications. Throughout the process, the digital model is the common thread of all stages, from the preliminary design to delivery to guarantee the handover to operation-maintenance.
By way of example, we have created specific and identical parameters for apartments / offices and car parks so that each BIM Manager integrates them into the models of the MOE. These parameters will then make it possible to link the apartments / offices modeled in a model to the car parks modeled in another model. Ultimately, we will thus have a more global picture of the allocation of parking spaces to the various programs in the district.
This operation is based on an open CIM / BIM approach, in addition to the Open BIM collaborative organization set up.
The Charenton-Bercy project is one of the most ambitious BIM / CIM projects in Europe. In addition to being the largest CIM project in France, very significant resources have been implemented for the use of BIM. Indeed, 5 BIM Managers and 1 CIM Manager, from leading BIM companies in their field, are involved in the project.
How is the OpenBIM approach used in this project?
In view of the high number of speakers from several countries and specialized in different disciplines, the use of OpenBIM appeared to be a necessity. The IFC 2X3 format is used to export the models and deposit them on the collaborative work platform BIMSync. The BCF format makes it possible to exchange information between BIM Managers and project managers, between the CIM Manager and BIM Managers and between the various project stakeholders.
The OpenBIM approach allows the visualization and annotation of a federated model, part of an iterative collaborative inter-batch process. Feeding and contributing to its consistency in terms of geometry and data is the core of the Phase 1 “collaboration”.
In addition, the BIM / CIM organization has been optimized to leave a lot of room for autonomy. In order to facilitate and supervise the exchanges between the BIM Managers and the CIM Manager, two parallel work environments have been developed on the BIMSync platform.
The first environment contains a separate BIM workspace for each of the MOEs and the second environment is made up of a CIM workspace regrouping and compiling the digital models of all the projects. They are lightened then submitted by the BIM Managers after verification and the working methods are uniform, in order to standardize the data appearing therein. This second environment frames the exchanges between the BIM Managers and the CIM Manager. This is a real innovation and a pioneering approach for a CIM project.
Can you tell us more about the biotope approach put in place?
The project targets high environmental stakes and strong commitments in terms of CSR with, among other things, the implementation of a biotope approach. For this, all the MOEs will integrate parameters of biotope by surface coefficients (CBS).
These indicators are linked to biodiversity, urban nature, the development of the circular economy, the recovery / recycling of site waste, the carbon footprint of buildings and mobility. These indicators will allow the measurement, monitoring and respect of commitments at all phases of the project and, at its conclusion, to know the biotope coefficient at the project scale.