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Catégorie : Projets

The Broadway London, UK

Publié sur par Sir Gwi

The Broadway London, UK

The Broadway London project consists of six buildings, ranging between 13 and 19 stories tall. This mixed-use development is located between Westminster and Victoria, directly adjacent to St. James’s Park Station, on a 1.7-acre triangular site.

The development includes 268 luxury apartments. Its ground floor will house 25,000 sq. ft. of high-end retail units, while the 1st to 3rd floors will provide 116,000 sq. ft. of prime commercial space. It also features a colonnade between the east and west buildings, with landscaped residents’ gardens on the roof terraces.

Dextra supplied over 20,000 units of Groutec S_ couplers, installed in 1,200 square and circular precast columns.

Groutec is a mechanical splicing system designed for the connection of precast elements in compliance with Eurocode 2, BS 8110, ACI 318, IBC, and AASHTO.

Lien de Doha (chaussée de Jaber)

Publié sur par Sir Gwi

Lien de Doha (chaussée de Jaber)

 
Doha Link is a marine bridge project currently being built west of Kuwait City. It will ultimately be connected to the Main Causeway Across Kuwait Bay, another sea link project north of Kuwait City, which will make the Jaber Causeway sea link, one of the largest civil engineering projects ever built in the Middle East. The Doha Link stretches west of Kuwait City. It will ultimately solve traffic congestion and offer a direct itinerary thanks to a 7.7 km bridge structure built on shallow waters across the Kuwait Bay.  

Rebar Solution de raboutage

Dextra a été impliqué dès le début du projet de construction afin de fournir une solution technique pour l'épissage des très grandes cages de barres d'armature constituant les pieux de fondation onshore et offshore. Rolltec® couplers for large diameter rebar (32, 36, and 40mm) were used for the connection of cages and piers. Two grades of rebar are used across the project: ASTM Grade 60 and Grade 80. Rolltec is compatible by design with the higher ASTM Grade 80; the same couplers may be used on all applications, simplifying stock keeping. In addition, smaller diameter couplers for rebar 12mm and 16mm were used for the superstructure and the footing of light poles. One of the main advantages of Rolltec for remote projects is its very light machine setup. Rolltec is supported by a single one-man machine, offering a high level of productivity. Because the equipment is relatively small and the rebar preparation efforts were taking place simultaneously on both sides of the sea link construction, Dextra dispatched up to 4 machines on each side of the project to support the Pieux efforts.  

Solution de tubes Sonitec

With large piles of 2.5m diameter and 60m depth on average, it was compulsory for GS E&C to conduct sonic logging tests to examine the integrity of concrete piles, requiring the installation of 8 tubes in each cage. To achieve very long tube length and optimize cage preparation output, Dextra Sonitec was the preferred choice of the contractor. Thanks to its lightweight and unique Push-Fit® connection feature. Sonitec provides enough flexibility during the cage construction, lifting, and assembly of the cage and removes the need for additional time-consuming welding operations.

Wasl Tower, UAE

Publié sur par Sir Gwi

Wasl Tower, UAE

The Wasl Tower is a 302m super-high-rise structure in downtown Dubai, surrounded by the Burj Khalifa, the tallest building in the world, and the new City Walk Development.

The tower will feature the world’s tallest ceramic façade, which will help regulate the internal temperature of the building while also reducing surrounding noise.

Moreover, vertical gardens and several shading and cooling design innovations will further minimize the building’s overall carbon footprint.

The project will comprise offices, residential areas, serviced apartments, and a 5-star Mandarin Oriental hotel, along with bars, restaurants, a spa, and a swimming pool.

Avec son concept structurel composé de trois murs de refend de 300 m de haut reliés à quatre grands stabilisateurs, des coupleurs de barres d'armature hautes performances sont nécessaires pour renforcer et relier les poutres et les colonnes en béton.

More than 280,000 Bartec standard couplers, weldable couplers, barres à tête, et RéparationGrip swaged couplers were delivered for this purpose.

Source des images : https://www.unstudio.com/en/page/11705/wasl-tower, https://www.facebook.com/UNStudioArchitecture/

SPARK Dry Port and Logistics Zone, Saudi Arabia

Publié sur par Sir Gwi

SPARK Dry Port and Logistics Zone, Saudi Arabia

Le développement du port sec du King Salman Energy Park (SPARK) en Arabie Saoudite va révolutionner le paysage logistique de la province orientale. Ce projet ambitieux, qui constitue un lien vital entre Dammam et al-Hasa, est sur le point d'améliorer considérablement les services douaniers tout en soutenant les objectifs de croissance économique et les initiatives d'Aramco au sein du complexe industriel SPARK.

A noteworthy aspect of this groundbreaking venture is the extensive use of Dextra’s 2.4 million linear meters of Glass Fiber Reinforced Polymer (GFRP) rebar for slab-on-grade applications in areas subject to heavy loads.

Barres d'armature en PRV is a composite material made by reinforcing a polymer matrix with high-strength glass fibers. Unlike conventional steel rebar, which is susceptible to corrosion when exposed to moisture and aggressive chemicals, Barres d'armature en PRV is inherently corrosion resistant. This key attribute makes it an ideal choice for a wide range of construction applications, especially in harsh environments where traditional steel rebar would quickly deteriorate.

Centrale nucléaire d'Akkuyu

Publié sur par Sir Gwi

Centrale nucléaire d'Akkuyu

La centrale nucléaire d'Akkuyu est une centrale nucléaire en construction à Akkuyu, à Büyükeceli, dans la province de Mersin, en Turquie. Ce sera la première centrale nucléaire du pays.

The four 1,200 MW VVER +3 units, with a total capacity of 4,800 MW, are the world’s first nuclear power plant project implemented on BOO (Construction - Propriété - Exploitation) (build-own-operate) principles by a subsidiary of Rosatom – Akkuyu NGS Elektrik Uretim AS (Akkuyu Project Company).

Les travaux majeurs de la première unité ont débuté en mars 2018 et devraient devenir opérationnels en 2023.

La construction de la deuxième unité a commencé 2 ans plus tard et devrait être achevée d'ici 2024, les unités 3 et 4 devant suivre respectivement en 2025 et 2026.

Dextra a fourni à ce jour plus de 700 000 coupleurs et contre-écrous Fortec+, ainsi que des équipements de préparation des extrémités de barres, pour une utilisation dans les 4 réacteurs et zones auxiliaires.

Fortec+ est un système d'épissure mécanique à filetage parallèle conçu spécialement pour les projets nucléaires pour le raccordement de barres d'armature pour béton de Ø12 à 50 mm (ASTM #4 à #18), conformément à l'Eurocode 2, ASME Sec III Div 2.

With the addition of a lock nut, it was fully engaged onto the extended thread of the connecting bar and helps eliminate the Déformation rémanente of the splice.

10 sets of bar end preparation system machines were also delivered at the site. The bar end preparation can be achieved in 3 steps: cutting the end of the rebar, Refoulement à froid to enlarge the sawn end of the rebar, and threading.

The Fortec+ system adds a fourth step, consisting of quality testing at the end of the rebar preparation process. The threaded bar end is tensile tested at 90% of the rebar yield strength to guarantee its performance.

Crédit photo : https://www.dailysabah.com/business/energy/construction-starts-on-2nd-unit-of-turkeys-1st-nuclear-power-plant-akkuyu?gallery_image=undefined# big (par Energya et Natural Ministère des Ressources)

Centrale nucléaire de Hinkley Point C

Publié sur par Sir Gwi

Centrale nucléaire de Hinkley Point C

La centrale nucléaire de Hinkley Point C (HPC) est l’un des projets les plus importants et les plus complexes technologiquement en Europe.

HPC est la première centrale nucléaire construite au Royaume-Uni depuis une génération, et sa construction nécessite une main-d'œuvre hautement qualifiée et les meilleures solutions de construction et d'ingénierie.

The HPC Project is located in Somerset, South West England, and will consist of two nuclear reactors capable of generating 3.2GW of low-carbon electricity.

The new power station is being constructed in the same area as the existing Hinkley Point A and B stations. The former ceased operations some time ago, while the latter is decommissioned in 2022.

Dextra s'est vu confier la fourniture d'épissures mécaniques de renfort en béton pour des pièces du HPC, notamment la coque de protection contre les chocs aéronautiques du réacteur.

More than 2.5 million Griptec couplers have been supplied for the construction of HPC.

Griptec is designed to comply with the most stringent project specifications, and has proven to be a popular system of choice for EPR nuclear power stations, having been used for the construction of the Flamanville 3, Taishan 1, and Taishan 2 power stations.

The Griptec mechanical splice consists of two steel sleeves which are swaged onto the end of the reinforcing bars by a specific machine that was designed and patented by Dextra.

This swaging machine incorporates a systematic, non-destructive pull test. Griptec is the only coupler system that provides an automatic quality control of each processed bar.

Besides Griptec couplers, Dextra is also supplying 3 million headed bars to the project. These are reinforcing bars that are bent on one side and fitted with an anchorage head on the other side and are used for the transverse reinforcement of concrete slabs, rafts, and walls. They allow a much faster and safer site installation than conventional double-bend bars.

When complete, HPC will provide low-carbon electricity for around six million homes.

Réacteurs Fuqing 5 et 6

Publié sur par Sir Gwi

Réacteurs Fuqing 5 et 6

Fuqing Reactor 5 and 6 are the first reactors of Hualong One, based on a 100% Chinese design. Each reactor has a capacity of 1,000 MW, with operations scheduled to begin in 2019 and 2022.

Dextra has been present on-site since the construction of Reactor 5 began in 2015 and is now involved in Reactor 6.

For this challenging project, Dextra has been supplying its Griptec rebar Solution de raboutage, which is used for Liaison d'armatures in the Coque avion.

Griptec is the preferred rebar Solution de raboutage in the nuclear industry due to its unique performance level and automatic testing process, which systematically tests all connections as part of its standard cycle—guaranteeing that 100% of the connections exceed project requirements.

More than a million Griptec connections will be used over the years for these two projects, supported by two Griptec machines installed on-site.

Dextra is also supporting the contractor teams on-site with two Dextra engineers rotating to provide operator training, setup, and preventive maintenance services. This ensures optimal production day and night, especially during peak times.

EPR Taishan 1&2

Publié sur par Sir Gwi

EPR Taishan 1&2

Taishan EPRs are two nuclear reactors of the EPR type, each with a capacity of 1,750 MW, built by Areva and located near Taishan in Guangdong province, China.

Dextra was present on-site from the beginning of construction in 2009 until 2016. Reactor operations were planned to start in 2017.

For this challenging project, Dextra supplied its Griptec rebar splicing solution, which was used in the concrete structure of the reactor.

The Bartec rebar coupler solution, as well as Headed Bars, was also used in other buildings of the project.

Centrale nucléaire de Kudankulam (KKNPP) 3 et 4

Publié sur par Sir Gwi

Centrale nucléaire de Kudankulam (KKNPP) 3 et 4

La centrale nucléaire de Kudankulam (ou KKNPP) est la plus grande centrale nucléaire d'Inde, située à Kudankulam dans le district de Tirunelveli, dans l'État du Tamil Nadu, au sud de l'Inde.

Two reactors (KKNPP-1 and 2) have been operating since 2013 and 2016, respectively, while two more (KKNPP-3 and 4) are currently under construction following the groundbreaking ceremony held in February 2016.

KKNPP-3 et 4 sont des réacteurs à eau sous pression de conception russe (modèle VVER-1000/V-412). Ces réacteurs sont des conceptions répétées des KKNPP-1 et 2, avec d'autres améliorations basées sur la mise en service et les retours d'expérience opérationnels.

For the construction of these two units, Dextra supplied 350,000 Bartec couplers to connect rebars in the reactor building, auxiliary building, and spent fuel storage structures.

Bartec is a trusted splicing system, well-known for its high performance in tension, compression, and fatigue. It is widely used in the construction of buildings, bridges, metro systems, nuclear reactors, and more.

Unit 3 is scheduled for completion in March 2023, with Unit 4 following in the subsequent year.

Upon completion, these two reactors will add 2,000 MW of electricity to the existing units, bringing the total site capacity to 4,000 MW.

Sources des images : https://twitter.com/daeindia/status/881395402171404288, https://www.deccanherald.com/content/619873/building-units-3-4-kudankulam.html

Centrale nucléaire 3&4 de Fangchenggang

Publié sur par Sir Gwi

Centrale nucléaire 3&4 de Fangchenggang

La Chine est l'un des plus grands producteurs d'énergie nucléaire au monde et elle augmente constamment sa capacité de production d'énergie nucléaire avec de nouveaux réacteurs.

Units 1 and 2 of the Fangchenggang Nuclear Power Plant have been operational since 2016, while Units 3 and 4 are currently under construction.

A total of six reactors are expected to be operational at the Fangchenggang site. Units 1 and 2 are both CPR-1000 reactors, while Units 3 and 4 are Hualong One reactors. The planned Units 5 and 6 are also expected to be Hualong One reactors.

Construction of Unit 3 began in December 2015, followed by Unit 4 a year later. Dextra has supplied more than 500,000 sleeves of Griptec coupler for the reinforcement of the APC structure.

Griptec is well known for its reliability and high performance in tension, compression, and fatigue, thanks to its unique design that meets the world’s most stringent project specifications, particularly for nuclear reactor construction.