Section 3A of Line 18 of the Grand Paris Express includes a 6.8 km long tunnel, eight ancillary structures and three stations, including Guyancourt. It is a buried structure with internal dimensions of 71.60 m
long, 23.51 m wide and 16.50 m deep. The underground structures are made of reinforced concrete and cast in place.

In infrastructure, it has the following levels:

• a ground floor,
• an intermediate level,
• a platform level,
• an under-platform level.

Access to the future station will be via two outlets opening onto a future avenue that will contribute to the dynamic urban transformation of the area. As part of the project, Guyancourt station was the launch pad for the Awa tunnel boring machine, which is digging the planned 6.8 km tunnel.

Faced with significant production challenges in the defence sector, MBDA has implemented an ambitious investment plan in France. Phased until 2030, it includes, among other things, the redevelopment and modernisation of the office area of the Selles-Saint-Denis unit.

The objectives of this transformation are to equip the site with sufficient production capacity and to provide employees with modern and safe working environments. The scope of the project includes the construction of new buildings, a security gatehouse, and an outdoor parking lot equipped with a 5,000 m² photovoltaic canopy designed to produce 20% of the site’s energy needs. All installations are designed to meet high levels of safety and security.

Ingerop supports this transformation through successive missions: building and site diagnostics, feasibility study, master development plan for the site, followed by assistance to the Owner.

Capillum, a startup based in Clermont, is developing a hair recycling sector, from collection to transformation into eco-friendly solutions (pollution-absorbing materials agricultural mulch) and for health benefits (medical research on keratin). As part of the installation of its industrial pilot at the Sustainable Materials Centre in the Cataroux park, Ingér’Up, our support offering for startups in their industrialisation strategy, carried out the site layout and industrial needs study, notably optimising usable space based on the available area.

The Ingér’Up team acted as a technical partner and trusted intermediary, assisting Capillum in its relationship with the property landlord.

A global expert in electrical specialties and advanced materials for high-tech industries, Mersen positions itself as a key supplier to the semiconductor industry. As part of its development, the Group aims to modernise the production lines of two buildings (7,000 m2) at its historic Gennevilliers site. The objective: to increase wafer production tenfold.

The Ingerop teams support this transformation by providing full design and construction supervision for the operation, as well as a dedicated process engineering mission. The latter includes flow studies to optimise yields and the layout planning of various networks and equipment (cooling circuits, water production, fluid distribution, etc.).

Founded in 2004, MCGP has grown around traditional jewellery craftsmanship. As part of its expansion, the group called on Ingerop for the full design and construction supervision (all trades) of a new 7,000 m² production facility that will include several workshops: assembly, finishing, machining, maintenance, quality control and logistics.

The client’s environmental requirements are also high: rainwater harvesting, industrial water recycling, use of renewable energies (geothermal and photovoltaic), green roofing, and the creation of green spaces including a permaculture vegetable garden. The goal is to achieve at least LEED Gold certification, with a target of Platinum level.

At its 650-hectare Tricastin site, one of the largest in Europe, the Orano group wants to renew its facilities for treating uranium effluent from the site’s activities. The Ingerop teams, thanks to their expertise in nuclear processes, have researched and proposed several innovative equipment solutions:

• analysis of various evaporation technologies and their compatibility with uranium-containing effluents to select the industrial evaporator that will reduce the annual treatment volume by a factor of five,
• sizing, energy efficiency optimisation and safety assessment for filter press filtration technologies. The main challenge is automating the system and improving radiation protection for the operators.

After successfully completing an first initial four-year mission, CEA DAM has renewed its trust in Ingerop with a new framework contract, in partnership with Tractebel and Assystem. The mission remains unchanged: to carry out design studies, renovation and creation of new complex and unique facilities (storage, manufacturing, maintenance) as well as scientific ones (data centers, research & development units, etc.).

The Ingerop teams will be specifically responsible for project management, industrial architecture, coordination and BIM, civil engineering, roadworks and utilities (VRD), geotechnics and handling mechanics.

Organised into dedicated workspaces near the CEA in Bruyères-le-Châtel, they will be best positioned to meet the client’s requests.

The hazard study carried out in 2020 by Ingerop revealed the need to reinforce the upstream waterproofing of the empty reservoir dam. In 2021, the CEBR launched a work schedule that incorporates environmental requirements and drinking water needs. Ingerop is managing the execution of this work, which began in 2024.

The project is structured around an initial phase of draining the reservoir, followed by dredging of the sediments. Next, the rehabilitation work takes place with the reservoir drained, notably including the installation of a waterproof geomembrane on the upstream face of the dam and the rehabilitation of the hydromechanical equipment.

The work continues with the refilling of the reservoir and the repair of the civil engineering defects.

In order to improve knowledge of the risk of flooding due to rainwater run-off in the Montpellier Mediterranean Metropolis area, the aim of this project is to model flood-prone areas throughout the region.

It enables flood-prone areas to be characterised, flood hazards to be mapped and development solutions to be proposed. The results will be used to prepare the PLUi*, crisis management and vulnerability reduction. The study covers 860 km of hydrographic network, in both urban and natural environments. The 2D hydrological and hydraulic modelling is carried out by applying rainfall to the natural terrain survey and utilising high-definition LIDAR data (IGN). A detailed sensitivity analysis is conducted on test areas (grids, buildings, and small walls). The results will then be used to support crisis management.

*plui: intermunicipal local urban planning plan

The second largest court in France, the Bobigny judicial court is expanding with the construction of a new building, which will be linked to the historic building by several footbridges.

This triangular extension of more than 20,000 m2 is a major challenge for improving the court’s operations. A vast forecourt bordered by gardens will be laid out on the rest of the plot, creating a link with the city.

For this project, Ingerop is responsible for the following tasks: for HVAC, plumbing, electricity, lifts, external works, operation and maintenance, pre-synthesis, regulatory thermal calculations, BIM, as well as project management via its subsidiary Cicad.

Architect: PCA-Stream

Located in the heart of Grenoble’s peninsula, Wood is an innovative project in terms of energy consumption, ecological footprint and thermal comfort. The office building is located on a disused industrial site, allowing 454 m2 of green space to be regenerated. The project adopted a responsible design approach, using wood for the framework, posts
and beams, walls and cladding on the façades.

Wood uses renewable energies (geothermal and geocooling) and has been designed to be bioclimatic (natural ventilation, optimisation of natural light, etc.). The project also promotes biodiversity by integrating nesting boxes into the thickness of the façades. Wood won two awards at the Pyramides d’Argent: the Business Property Prize and the Regional Grand Prize. It is certified NF HQE Bâtiment Durable ‘Très Performant’, Ready to Osmoz, BEPOS Effinergie 2017, BiodiverCity, E+/C- (level E3C2) and RT2012 -77%.

Arcora, a subsidiary of the Ingerop Group, was responsible for the façade engineering.

Architect: ECDM Architects

The Ingerop Group’s knowledge of the hospital sector and its constraints enables it to propose functional and efficient architectures. That’s why the Moulins-Yzeure hospital centre chose our bid to restructure the facility.

The 7,700 m² project comprises:

• the construction of a new building to house the emergency department, the SAMU departmental call centre and the SMUR, with a helipad,
• the redevelopment of five existing floors, spread over three buildings, to create an outpatient unit, two medical units and a paediatric ward.

The entire operation is being carried out on an occupied site, with activities being maintained. The Ingerop teams are more specifically in charge of project management for the design (concrete structure, steel structure, external works, HVAC, electricity, medical fluids and sanitary plumbing).

Architect: Michel Remon & Associés