Groupe Dextra | Connexions fiables

Centrale électrique à cycle combiné solaire intégrée de Green Duba

Centrale électrique à cycle combiné solaire intégrée de Green Duba

Duba ISCC Green Power Plant 1 is a large power infrastructure project located in the northwest of Saudi Arabia, along the Red Sea. The ISCC (Integrated Solar Combined Cycle) technology adds 50 MW of solar power to the gas and steam turbines, generating a total of 500 MW of electricity.

For this project, Dextra supplied Double Corrosion Protection Ground Anchors, used as a permanent anchoring solution for the excavation work preparing the pumping chamber. A total of 264 anchors (Grade 1080/1230, Ø32 & 40 mm) were supplied and installed across four layers.

Le Double Corrosion Protection anchors supplied for this project were pre-grouted at the Dextra factory, applying the first layer of grout between the steel bar and HDPE sleeve. The pre-grouted segments were reconnected on-site using couplers. Pre-grouted anchors not only save time and reduce costs during on-site operations, but they also enhance overall anchor quality by ensuring that the first grout layer is applied in a factory-controlled environment.

L'installation sur site a été réalisée par l'entrepreneur en fondations BAUER, qui a réalisé les opérations de forage, de levage, d'installation, d'injection et de post-tension. Dextra a offert des conseils dès les premières étapes de l'installation en envoyant une équipe de spécialistes géotechniques sur place.

La séquence générale d'installation est la suivante (illustrée dans les images ci-dessous) :

  1. Après déballage des racks d'expédition, épissage des segments avec des coupleurs, recouverts de gaines thermorétractables.
  2. Transport de l'ancre assemblée de l'assemblage au chantier jusqu'à la zone de levage (13 kg par mètre linéaire).
  3. Câble de câblage en tête d'ancre pour contrôler la descente. Tuyau d'injection également préinstallé le long de l'ancrage.
  4. Insertion de l'ancre de 30 mètres dans le trou foré avec le tuyau d'injection.
  5. Après le jointoiement et la contrainte, un capuchon rempli de graisse est installé sur la tête d'ancrage, maintient l'ancre entièrement isolée de l'environnement extérieur corrosif.

Pour plus d'informations sur nos solutions d'excavation et de sol au Moyen-Orient, veuillez contacter notre Bureau de Dubaï.

Queensland Curtis GNL (QCLNG)

Queensland Curtis LNG (QCLNG) Project: A Major Coal Seam Gas to LNG Development

The Queensland Curtis LNG (QCLNG) project is located on Curtis Island, Gladstone, Queensland, Australia. It involves the conversion of coal seam gas (CSG) reserves into liquefied natural gas (LNG), as well as the expansion of CSG exploration and development in southern and central Queensland.

The project encompasses multiple components, including gas fields, pipelines, an LNG plant, a swing basin and channel, and shipping operations. Construction began in late 2010.

Dextra contributed to the project by delivering 307 tons of barres de liaison marines and accessories in Grade 460. These tie bars serve as anchorage for the anchor walls of the marine offloading facility.

Centrale électrique de Bang Pakong

Bang Pakong Power Plant: Thailand’s First Natural Gas-Fueled Power Facility

Bang Pakong Power Plant is Thailand’s first power plant to use natural gas from the Gulf of Thailand as its primary fuel source.

Located on the left bank of the Bang Pakong River in Chachoengsao Province, the plant comprises both thermal units and combined cycle blocks, with a total capacity of 2,490 MW.

The plant was built to compensate for the loss of power-generating capacity following the decommissioning of the 1,050 MW Bang Pakong Combined Cycle Power Plant in 2014.

Dextra’s Contribution to the Project:

Dextra supplied a wide range of Bartec rebar couplers, ranging in size from 12 mm to 32 mm, for the construction of the plant’s cooling tower and combined cycle blocks. These couplers were used to reinforce and connect precast columns and precast beams.

En plus, Groutec couplers were installed in precast columns, providing a fast and efficient connection to the foundation at the construction site. Once the precast columns were lifted and placed into position, the embedded couplers were injected with grout, ensuring a secure and reliable connection.

Dextra products: Bang Pakong Power Plant

*Autorité de production d'électricité de Thaïlande. Centrale électrique de Bang Pakong, 2019, www.egat.co.th/en/information/power-plants-and-dams?view=article&id=37.

Usine de GNL de Wheatstone

Usine de GNL de Wheatstone

Wheatstone LNG is a liquefied natural gas (LNG) plant located in Western Australia. The plant is owned and operated by Chevron Australia.

Dextra was involved in the project between 2013 and 2014, contributing to the design and delivery of barres de liaison marines systems used to connect sheet pile walls and combi walls.

To facilitate installation and enable a multidirectional rotation angle of ±5°, Dextra Captive Nuts were embedded within the pile reinforcement and cast into concrete.

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Additionally, Dextra supplied waling beam systems (including channels and bolts) to provide structural support for the barres de liaison marines on the sheet piles.

Dextra’s systems are now anchoring the quay structure of the offloading facility, which can be identified as an L-shaped structure in the image above (copyright top picture: Chevron Australia).

Terminal GNL de Dunkerque

Dunkirk LNG Terminal: A Key Energy Infrastructure in France

The Dunkirk LNG Terminal is a new natural gas facility built in northern France. The project is owned by EDF (France’s main energy company), Fluxys, and Total. The terminal facilitates the importation of liquefied natural gas (LNG), which is transported at an ultra-low temperature of -163°C. It plays a crucial role in meeting the growing demand for natural gas in France and Belgium, supplying 20% of the total national consumption of these two European markets. It is the second-largest LNG terminal in continental Western Europe.

For this major energy infrastructure project, Dextra collaborated with Bouygues Travaux Publics to supply Griptec, Dextra’s most advanced rebar splicing solution. Dextra provided the Griptec sleeves, while our local network of fabricators handled bar end preparation.

Griptec was used in the following key applications:

  • Three reservoir external walls: Installed in vertical applications to reinforce structural integrity.
  • Congested areas: Griptec Headed Bars were used as a substitute for hook bars, optimizing space and reducing congestion.
  • Temporary openings: Griptec was also applied in various parts of the project to create temporary openings, facilitating the movement of personnel and equipment through the reinforcement.

For more information on similar applications, please refer to the Tanger Med 2 Port project, also completed by Bouygues.

For details about Griptec and rebar splicing solutions in Western Europe, please contact our Bureau parisien.

Singapour SLNG n°2

Singapore SLNG No.2: A Key LNG Hub in Southeast Asia

The Singapore LNG (SLNG) No.2 terminal is a liquefied natural gas (LNG) facility located in Singapore. The terminal houses four large LNG storage tanks and is capable of receiving the largest LNG carriers, including Q-Max carriers. As a strategic LNG hub for Southeast Asia, the terminal plays a crucial role in the region’s energy infrastructure.

For the Singapore LNG offloading facility, Dextra assisted contractor Samsung with the design and supply of a complete marine tie bar system, used to reinforce the sheet pile walls.

Dextra tie bar assemblies were manufactured using Grade 500 steel and were anchored to the sheet pile walls using waling beams, plates, and nuts.
To facilitate installation and provide flexibility, large-diameter ball cages were installed, allowing a multidirectional rotation angle of ±10°.

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Additionally, to adjust tie rod lengths and splice long tie bars together, turnbuckles were supplied as part of the system.

Port de Fujaïrah

Fujairah Port: A Key Maritime Hub in the UAE

The Port of Fujairah, located in the emirate of Fujairah on the Gulf of Oman, is the only multi-purpose deep-sea port on the eastern seaboard of the United Arab Emirates (UAE). Strategically positioned 130 km south of the Strait of Hormuz, it serves as a crucial gateway for international trade and energy exports.

Dextra was involved in the expansion of the port between 2007 and 2008.

Oil Terminal 2 (OT2)

For the new Oil Terminal 2 (OT2), Dextra engineered and supplied the Marine Tie Bar systems used for the anchoring of the Main Quay walls.
More than 1,400 tons of tie bars were provided for this large-scale project.

Postes d'amarrage du brise-lames sud

In 2008, Dextra also engineered and supplied Marine Tie Bar systems for the anchoring of the Tugs Jetty, Craft Docks, and Main Quay Wall. Short Barre de cravate marine assemblies were installed between King Pile Walls.
To facilitate transportation and installation, high-performance Grade 700 steel was selected, allowing for a higher level of performance with relatively smaller diameters.

Petronas RAPIDE

Petronas RAPID: A Strategic Petrochemical Complex in Malaysia

Petronas RAPID (Refinery And Petrochemical Integrated Development) is a large-scale petrochemical complex located in the southernmost part of Johor, Malaysia, across the sea from Singapore.

Commissioned in 2016, the RAPID development aims to increase local production capacity by 300,000 barrels per day, making it a strategic asset for the Malaysian peninsula.

Pour ce projet, Dextra a fourni son Bartec system for the construction of precast pipe racks across the site. A total of 30,000 Bartec Têtes d'ancrage were used to create horizontal anchoring points for pipe rack beams.

To support the project, a Bartec machine was installed directly on-site and commissioned by the Dextra team, ensuring efficient bar preparation and seamless integration into the construction process.

Réservoirs Cylingas

Cylingas Reservoirs: Industrial Gas Storage in the UAE

The Cylingas gas tanks are part of the industrial complex of Cylingas, located in Al Quoz, United Arab Emirates.

For the installation of new gas tanks, Dextra supplied its tension rods systems, which were used for the cross-bracing of the tank footing structure. Carbon steel rods in Grade 355, with a diameter of 120 mm (thread M123), were selected for this application. The rods were delivered with forks, lock covers, and turnbuckles. A total of 48 sets were installed for this project.

The assemblies were fixed onto the pylons using gusset plates connected to the forks. Turnbuckles were installed in the lower part of the assembly to facilitate installation, allowing for length adjustment and stress control by bringing two bar segments closer together.

For more information on Tension Bars in industrial settings, please download our dedicated introduction brochure.

Pour plus d'informations sur la disponibilité de systèmes de barres hautes performances au Moyen-Orient, veuillez contacter notre Bureau de Dubaï.

Agrandissement de la raffinerie de Jamnagar

Extension de la raffinerie de Jamnagar : la plus grande raffinerie du monde en termes de capacité de production

Située dans le Gujarat, dans l'ouest de l'Inde, la raffinerie de Jamnagar est la plus grande raffinerie au monde en termes de capacité de production. Propriété de Reliance Industries, elle a été mise en service en 1998 et s'étend sur une vaste superficie de 50 km².

Pour la seule phase 3, plus de 305 000 tonnes d'acier Armatures ont été utilisés dans un projet de 36 mois, impliquant plus de 100 000 ingénieurs et ouvriers du bâtiment.
Dextra est impliqué à Jamnagar depuis les premières phases, en fournissant des barres d'armature solutions d'épissage pour les phases 1, 2 et 3 du projet.

Barres d'armature de Dextra Solutions d'épissure pour la phase 3 :

Trois solutions de coupleurs de barres d'armature ont été utilisées dans la phase 3 :

  • Solution Bartec
    Utilisé pour les applications coulées sur place, y compris les connexions barre à barre dans les fondations, les cages de pieux et les cages de colonnes.
    Également utilisé dans les radeaux et les chapeaux de pieux fortement encombrés pour faciliter une utilisation efficace Liaison d'armatures.
  • Coupleurs Groutec
    Appliqué aux supports de tuyaux, qui ont été construits à partir de Préfabriqué éléments dans un dédié Préfabriqué usine au sein du projet.
    Positionné dans les éléments inférieurs et rempli de coulis, éliminant ainsi le besoin de mouillage in situ joints et assurer des connexions rapides et sécurisées entre les poutres et les colonnes.
  • Coupleurs Unitec
    Utilisé dans les applications où la longueur des barres d'armature était trop courte pour permettre des connexions de chevauchement traditionnelles.

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