Laure Pophillat
17/01/2025
Article updated on 17/01/2025
In 2017, the Madar group acquired a building from Renault, located at 49/51 avenue de la Grande Armée, in the 16th arrondissement of Paris, and embarked on an ambitious rehabilitation project.
In 2017, the Madar groupvia two of its entities (Pardes Heritage and Heritage Forum), does theacquisition of a building from Renaultlocated at 49/51 avenue de la Grande Arméein the 16th arrondissement of Paris : of a floor area of 8 701 m2 on a land rights of 1 950 m2the acquired set consists of three interconnected buildings by half levels and common circulation areas, rising to R+5 with levels of different heights.
Landlocked in the middle of numerous Haussmannian buildings, between Avenue de la Grande Armée and Rue Le Sueur at the rear, the original construction of the premises dates back to the end of the 1950s for the main building and the beginning of the 20th century for both. other buildings added subsequently. © DTACC
The Madar group wanted to rethink the architecture, layout and circulation of this complex, based on a specifications ambitious in terms of aesthetics and construction durable. To do this, he surrounded himself with:
– THEOP,
– AMO,
– of cabinet d’architecture DTACC,
– and the entity Spie batignolles Île-de-Francein the capacity ofgeneral contractor in charge of the work.
An assumed architectural bias enhanced by noble materials
In search of homogeneity
The original building at 49-51 avenue de la Grande Armée will go from one very sober architecture to an assumed architectural bias, contemporary and sublimated by noble materials. The architect's proposal also focused on the need to make the real estate complex perfectly homogeneous, where three buildings of different inspiration constituted a group lacking coherence.
Although built from the 1950s without classified architectural elements, DTACC had to consult the architects of Bâtiments de Franceresponsible for issuing opinions on the materials useddue to the existence of Parisian courses subject to this type of procedure.
A mix of materials
THE façades will be made from a mix of materialsincluding the boismainly, but also the glass and steel. And brick cladding will be implemented on the facade piersand wooden privacy screen installed. Many glazing on the front of the building and in the heart of the block will promotenatural lighting within this building nestled in the middle of many buildings.
The facades will be made from a mix of materials, including wood, mainly, but also glass and steel. © DTACC
Green roofs
Both roofs of the low and high levels will be landscaped. At the level of the lowest roofa vast agricultural greenhouse will be arranged to allow users to meet during convivial moments. In the upper part, a rooftop will be accessible by an elevator, serving all floors of the building.
A very dense urban environment
As the building does not face directly onto the street, the Spie Batignolles Île-de-France teams access the construction site only via two porches located on either side of the building, from theavenue de la Grande Armée and rue Le Sueur. The two porches will be renovated at the end of the workinspired by building facade elements rehabilitated and always with a touch of revegetation.
The density of the neighborhood, in terms of buildings with residential and office buildings rising to R+6, as well as heavy road and pedestrian traffic, did not allow the installation of a crane. All work is therefore carried out using small construction machines, capable of passing under the two porches: a construction site lift and a mobile winch allowing the materials to be transported to the different levels. © Germain Hazard / Royal Spark
For the supply of concretemainly cast, the teams have a track pump with a flow rate of 30m3/hour installed in the side porch avenue de la Grande Armée. More than 200 m from pipes are routed via hoppers to enable teams to serve the entire structure.
A significant part of demolition
Initially, thebuilding was completely stripped inside and out to be asbestos removed and cleaned before the Spie batignolles Île-de-France teams intervene to launch the demolition work. These concerned a volume of 1,500 m3 and a surface area of 1,200 m2. Nearly 50% of the floors were demolished.
The demolition is carried out using fine traditional methods, such as remote controlled brokksof the core drillingof the cable sawing…
Creation of two additional basement levels
The program plans to carry out two basement levels additional, intended to accommodate technical rooms, an auditorium, technical aisles, a catering area and a fitness room.
To do this, the Spie Batignolles teams carry out work of underpinning, by deepening the supports and the periphery of the buildingto a depth of ten meters. To do this, the teams use the headframe method.
The headframe method involves the implementation of temporary supports which will take up the loads of the posts and thus allow their demolition and the construction of new posts. To achieve these, the teams work in armored wells measuring 2.5 x 2.5m, reaching depths of almost 10m in order to reach the level of the future foundations. Once this step has been completed on all the posts, the earthworks phase will be launched. © Germain Hazard / Royal Spark
In total, there are 8,500 m3 of land which was evacuated by means of a daily flow of ten dump trucks.
Low carbon footprint construction
To include the operation in the requirements of several environmental certificationsreasoned choices were made in order to enter into the budget carbone defined in the specifications of the customer, including:
– the carbon weight of the rehabilitation part displays a reduction of CO2 emissions between -20 and -30% compared to requirements of the BBCA Rénovation Label (2018) ;
– All evacuated materials are sent to a recovery platform with an objective of 100% recovered rubble and 80% concerning the others construction site waste ;
– 2 500 m2 of false floors made on this operation will come from external reuse;
– 5 500 m2 of the original floors are preserved.
– The entire 2,500 m3 of concrete used as part of the rehabilitation of this real estate program is 100% low carbon concretedisplaying a bilan carbone of 160 kg CO2 equivalent / m2 of concrete used, and composed of cement in CEMIII with 36% slag (supplied from a Unibéton plant located in Clichy).
For this operation, the Madar group aims for a BREEAM® Excellent and BBCA labeling, WiredScore (valorization of connected buildings) and OsmoZ (quality of life at work).
Started during the last quarter of 2023, the construction site will be delivered in December 2025, i.e. duration of construction of 27 months, for a amount of work of 30.3 million euros excluding tax.
At the height of its activity, between 80 and 90 companions and supervisors will work on this site.
Source : batirama.com / Laure Pophillat
