Categories for Europe

Supporting the industrialisation of the Grésivaudan area…

14 February 2023
…through sustainable development. The Grenoble region is a highly-attractive industrial basin for companies developing cutting-edge techniques. STMicroelectronics, a French-Italian semi-conductor manufacturer and world leader in micro-electronic components, is currently building a gigantic production plant in Crolles, in the Isère area. To ensure water supply to this industrial plant, the Grésivaudan Community of Municipalities has awarded 4 contracts to link the Saint-Ismier reservoirs to the Crolles site via 8km of 600mm-diameter pipelines. SADE (Poitiers-Metz Regional Division) was awarded contract n°3. Extending the lifespan of networks For this project, the Grenoble agency recommends Class 50… +

Successfully renewing ties with Dalkia

2 February 2023
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. Raw data 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… +

SADE the outstanding choice for Choisy…

24 January 2023
 …to rehabilitate a large retention tank in the event of H2SO4 accidents. Veolia Eau d’Ile-de-France (VEDIF), delegate of the Ile-de-France Water Authority (SEDIF) is responsible for ensuring the public water supply service, in addition to the maintenance of the Authority’s heritage network. In this regard, VEDIF called on the Civil Engineering and Special Works Agency of the Rennes Regional Division to carry out the tanking by Hydroclick® of the emergency retention basin, located under the two 60m³ sulphuric acid tanks (H2SO4) of the Choisy-Le-Roi water production plant. The Ivry-sur-Seine Agency (Paris Regional Division) also… +

Rehabilitation of an SNCF drainage collector

12 January 2023
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… +

Renovation of the Clichy-la-Garenne wastewater treatment plant

18 November 2022
Civil engineering works, poles and cover slab for basin T30. Built almost 160 years ago, the Clichy-la-Garenne pre-treatment plant (operated by the Paris Wastewater Authority (SIAAP)) is the transit point for a significant proportion of wastewater from the Paris conurbation. The large-scale renovations to this plant include the building of a new 70,000m³ storage basin for surplus rainwater, the modernisation of the current pre-treatment unit and the building of a second unit. Order 1 works began in 2019 with the laying of diaphragm walls, the coupling beam and apron of this imposing T30… +

An underground basin in Rouailler, the 4th and final step of a long-term project

26 August 2022
The adventure of the Rouailler basin began in 2011, in the Livry-Gargan municipality of Seine-Saint-Denis, on behalf of the Departmental Council, with the Water Department acting as project contractor. This new basin will replace the existing facilities, which are no longer adequate given the municipality’s urban growth, and augments the municipality’s service network, notably to include surplus stormwater drainage. On a broader scale, this project forms part of the overall rehabilitation of the department to enhance the sanitary quality of local waterways, by ending the discharge… +

Supplying drinking water to the town of Thonon

21 July 2022
A daunting challenge, given the Allinges and Lyaud mountains, to be met with an MTBM! A portion of the water supply pipe, dating from 1936, which links the catchment point in the natural springs of the Blaves galleries (Lyaud) to the Chavannes reservoir (Allinges) was collapsing and in need of replacement. This is a particularly significant operation for the Thonon conglomeration and its users, as the network in question supplies 90% of the town of Thonon-les-Bains and ensures safe water for more than 30,000 inhabitants. Given the local topography (a hill over… +

A technically challenging project

20 January 2022
following the collapse of a 19th-century underground structure in Valenciennes. In early September 2021, the Valenciennes Métropole Local Authority (CAVM) made an urgent call to SADE Special Works. The vault of a 19th-century gallery, located under Place de l’Esplanade in Valenciennes, partially collapsed following road redevelopment works. This gallery channels the Grand Bruille underground river. A key facility for the CAVM, the recommissioning of the whole square had to be executed urgently: the road works were scheduled to resume in mid-October on the collapsed portion, and reinforcement works to the structure had to be completed by… +

Large-scale drainage works to the north of Tours

2 December 2021
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… +

Improving a municipality’s drainage network

24 November 2021
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… +