with the fitting of the diffuser, an essential pipeline element.
Power production units require a constant supply of water for the operation and cooling of circuits. To ensure an ongoing supply of sufficient quantities of water and maintain the safety of a plant, the formation of frazil ice is to be avoided at all costs.
To prevent this risk, the Rennes and Bordeaux Regional Divisions laid a hot water supply system in the vicinity of the pumping station grids and the sections requiring protection. The diffuser, located at the mouth of the network, is the pipe section via which the… +
with the building of a heating network extension!
In Fleury-sur-Orne in the Calvados region, DALKIA entrusted the Rouen RD (Giberville Agency) with the extension of the town’s heating network on Avenue d’Harcourt (RD 562) and Grande Rue. This turnkey project included the supply and laying of all elements, optimised at every step from preparation to execution.
1.1km of two-way network in Class II pre-insulated steel, 219mm inner diameter and 355mm outer diameter, for a total 2.2km of pipes.
140 16-metre tubes and special parts, arc-welded in 2 phases
200 welding operations and insulation repairs
8 joints and 10… +
Using the Bluelight® technique, particularly adapted to limited-access networks.
In Ablaincourt-Pressoir, the defects observed during compulsory periodical inspections of the drainage collector (250mm-diameter and 3m deep) along the high-speed train line called for the rehabilitation of this collector.
SNCF decided to use these works, executed by the Non-Inspectable Rehabilitation team from SADE Special Works, as a test project.
The solution requested by SNCF was to sheathe the existing drain to maintain its transport function and to place a new shallow drain on the ground level.
SADE teams set to the task, beginning with the waterproofing of the collector, then sheathing… +
5 years after La Riche, Rennes RD and SADE Special Works pooled their expertise once more on behalf of Tours Métropole, for vast drainage works between Tours and Saint-Cyr-sur-Loire.
Broken down into two orders attributed to the Rennes RD and SSW, this 15-month, out-size task involved the extension of the drainage network to the north of the Tours metropolis, with the building of a primary collector to transport wastewater to the main treatment plant (La Grange) in La Riche, the ultimate goal being to close down all the small treatment plants in… +
The Loire-Forez conglomeration entrusted the SADE Group with the separation of a sewer mains section in the Saint-Just-Saint-Rambert municipality. Works were co-contracted by the local SADE agency and DPSM, our Toulouse-based subsidiary and rehabilitation expert.
Double, rehabilitate and separate
Along around 450m on Avenue des Barques, the task was to:
Rehabilitate a T180 ovoid
Build a stormwater collector in parallel (800mm-diameter concrete)
Create/modify all branch connections to separate stormwater and wastewater drainage along most of this section
The DPSM teams took care of the rehabilitation, while the Poitiers-Metz RD, and more specifically the Saint-Etienne branch… +
In Beaumont, as part of a project to install junctions to the Pourliat stormwater basin drain, Clermont Auvergne Métropole (CAM) called on SADE Special Works and the Poitiers-Metz RD (Clermont-Ferrand Agency), to create a stormwater collector using microtunnelling (1,200mm-diameter) along 635m.
Works were executed:
In two thrusts: the first along a straight distance of 240m and the second along 395m with a 200m bend of 400m radius
from a single entry shaft to two exit shafts.
Using standard techniques, SADE Special Works carried out the excavation works… +
In March 2021, building works began to the wind farm off the Calvados coast, with commissioning scheduled for 2024. RTE entrusted SADERTELEC with the creation of the project’s dual electric land link. Works were carried out in synergy with the Rouen RD up to February 2022.
Very High Voltage
Located 10 to 15km off the Courseulles-sur-Mer coastline, this wind farm will consist of 64 wind turbines capable of producing 450MW, i.e. 90% of the power needs of the Calvados area (approximately 630,000 inhabitants). Its production will be transported to… +
To transport wastewater to its pre-treatment and treatment facilities, the Greater Paris Sanitation Authority (SIAAP) manages a 440km network composed primarily of outfalls with manhole access. The rehabilitation of 11 manholes, along the north-east outfall, was entrusted to SADE Special Works.
A similar task across the board…
For 10 manholes of 20m to 65m in depth, all equipped with a concrete staircase, SADE Special Works’ task was to clean, purge coatings, apply a special mortar for hostile environments and, where necessary, replace or install safety features such as handrails.
SADE and SAT working well together!
The Rouen Normandie Metropolitan Authority has appointed a SADE (agent)-SOGEA consortium to rehabilitate the wastewater and stormwater networks on Esplanade Saint-Gervais in Rouen. This area on the banks of the Seine – used regularly for major events, such as trade fairs, funfairs, exhibitions, etc. – is now a huge construction site working to a tight timescale.
The main objective is to be able to collect and pre-treat – by means of temporary connection points, a new network and associated works – all… +
In Béziers, as part of the rehabilitation of a section of the town’s sanitation network.
The Béziers Méditerranée Urban Authority has accepted DPSM’s solutions for the rehabilitation of a visitable segment of its sanitation network located right next to the mainline rail station and partly beneath its tracks.
A strategic but congested main sewer
This section is part of a mains sewer that transports just over half of all the town’s wastewater. A fact that led to the installation, during the works, of a by-pass with a capacity of 600m³/h. The DPSM teams… +