Dextra Group | Reliable Connections

Green Duba Integrated Solar Combined Cycle Power Plant

Green Duba Integrated Solar Combined Cycle Power Plant

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.

The 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.

Installation at site was carried out by foundation contractor BAUER, which performed drilling, lifting, installation, grouting and post-tensioning operations. Dextra offered guidance during the early steps of the installation by sending a team of geotechnical specialists at site.

The general sequence of installation is the following (illustrated in pictures below):

  1. After unpacking from shipping racks, splicing of segments with couplers, covered by heat shrink sleeves.
  2. Transportation of assembled anchor from assembly to site to lifting area (13kg per linear meter).
  3. Wiring cable at the head of anchor to control the descent. Grouting pipe also pre-installed along the anchor.
  4. Inserting the 30 meters anchor into drilled hole together with grouting pipe.
  5. After grouting and stressing, a head cap filled with grease is installed on the anchor head, maintain the anchor fully isolated from the corrosive outside environment.

For more information about our excavation and ground solutions in the Middle East, please contact our Dubai office.

Queensland Curtis LNG (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 marine tie bars and accessories in Grade 460. These tie bars serve as anchorage for the anchor walls of the marine offloading facility.

Bang Pakong Power Plant

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.

Additionally, 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

*Electricity Generating Authority of Thailand. Bang Pakong Power Plant, 2019, www.egat.co.th/en/information/power-plants-and-dams?view=article&id=37.

Wheatstone LNG Plant

Wheatstone LNG Plant

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 marine tie bars 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 marine tie bars 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).

Dunkirk LNG Terminal

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 Paris office.

Singapore SLNG No.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’s 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.

Fujairah Port

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.

South Breakwater Berths

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 Marine Tie Bar 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 RAPID

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.

For this project, Dextra supplied its Bartec system for the construction of precast pipe racks across the site. A total of 30,000 Bartec Headed Bars 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.

Cylingas Reservoirs

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.

For more information about the availability of high performance bar systems in Middle East, please contact our Dubai office.

Jamnagar refinery expansion

Jamnagar Refinery Expansion: The World’s Largest Refinery by Production Capacity

Located in Gujarat, western India, the Jamnagar Refinery is the largest refinery in the world by production capacity. Owned by Reliance Industries, it was commissioned in 1998 and spans a vast 50 km² area.

For Phase 3 alone, more than 305,000 tons of steel reinforcement were used in a 36-month project, involving over 100,000 engineers and construction workers.
Dextra has been involved in Jamnagar since the early phases, supplying rebar splicing solutions for Phases 1, 2, and 3 of the project.

Dextra’s Rebar Splicing Solutions for Phase 3:

Three rebar coupler solutions were used in Phase 3:

  • Bartec Solution
    Used for cast-in-situ applications, including bar-to-bar connections in foundations, pile cages, and column cages.
    Also utilized in heavily congested rafts and pile caps to facilitate efficient rebar splicing.
  • Groutec Couplers
    Applied to pipe racks, which were constructed from precast elements in a dedicated precast factory within the project.
    Positioned in the bottom elements and filled with grout, eliminating the need for in-situ wet joints and ensuring fast, secure connections between beams and columns.
  • Unitec Couplers
    Used in applications where rebar length was too short to allow traditional overlap connections.

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