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Category: Projects

Bangkok Arena

Posted on by Sir Gwi

Bangkok Arena

The Bangkok Arena is a multisport indoor arena located in the Nong Chok district, east of Bangkok. Originally commissioned to host futsal tournaments, an indoor version of football, the arena now also hosts volleyball and basketball events, as well as concerts. It has a seating capacity of up to 12,000 people.

For this project, Dextra engineered and supplied the Tension Rods suspending the roof of the building in 2012.

The long architectural bar systems are anchored to concrete pylons and act as suspenders to support the building’s roofing structure.

For this project, Tension Rods were supplied in Grade 700, the highest in our range. The highest grade allows for a better performance-to-steel ratio, enabling the use of smaller diameters. This results in a slimmer structure and overall improved aesthetics. Additionally, smaller-diameter bars and lighter elements facilitate easier handling and installation on-site.

Each bar segment is spliced to the next using either couplers (for fixed lengths) or turnbuckles (for length adjustment and tensioning).

Connection to the concrete structure is achieved through fork ends mounted onto steel gusset plates.

In total, more than 129 tons of Tension Rods anchor the roof structure, with tendons exceeding 30 meters in length.

Chaglla Dam

Posted on by Sir Gwi

Chaglla Dam

Chaglla Dam is a hydroelectric dam built on the Huallaga River in the Huánuco region of Peru. The dam stands 203 meters high and has a maximum installed capacity of 456 MW.

For this major dam project, Dextra consistently supplied its Rolltec rebar coupler solution to Brazilian contractor Odebrecht from 2012 to 2015.

Rolltec is the most popular rebar splicing solution in Latin America, offering a competitive alternative to lap splices.

Rebar preparation is supported by a unique lightweight machine, which can be operated by a single person. The Rolltec machine is relatively easy to transport and convenient to install, even in remote locations such as dam construction sites.

Beyond just couplers and equipment, Dextra also took charge of machine commissioning and operator training, ensuring the contractor’s team made the most of their rebar coupler solution.

Doha Metro Msheireb Station

Posted on by Sir Gwi

Doha Metro Msheireb Station

Msheireb Station is the major interchange station of the Doha Metro. Located in Downtown Doha, it connects all of three lines (Red, Green and Gold) and will provide a gateway 2022 FIFA World Cup 2022 stadiums

The Msheireb Station will become one of the largest subway stations in the world by size.

Soft-Eyes for TBMs

For this major project, Dextra engineered and supplied between 2013 and 2015 8 large ASTEC GFRP Soft-Eyes, of a diameter of 8 meters each. Soft Eyes are cages of GFRP rebar, positioned into the D-Walls in-between steel segments. GFRP Soft-Eyes allow Tunnel Boring Machines (TBMs) to go through in a minimum time as the bars can be easily crushed by the tunnel machine.

Tie-Back anchors

To anchor the massive d-walls and prevent any soil displacement during excavation works, Dextra also supplied its ASTEC Active Anchors (AAA). Those innovative post-tensioned GFRP-based anchors, have the benefits of being cut by the Tunnel Boring Machines or standard excavation equipment. Because it can be easily cut, it doesn’t need to be removed from the ground, even when used for temporary applications.

In the case of the Msheireb stations, multi-tendons anchors (10 per anchor on this project) have even been installed in the center of Soft-Eye to anchor the D-Wall. Those anchors were also cut during the tunneling break-through (visible in the video below). In total 150 anchors were installed in the station.

Heathrow Airport Terminal 5

Posted on by Sir Gwi

Heathrow Airport Terminal 5

Heathrow Airport, located approximately 25 km west of central London, is the busiest international airport in the United Kingdom.

Dextra was involved in the construction of Terminal 5 and its associated structures.

For Heathrow Airport, Dextra provided its most advanced rebar splicing solution: Griptec, which is distributed in the United Kingdom by local expert fabricators.

Due to its high performance, inherent reliability, systematic proof loading of every connection in factory conditions, and comprehensive certification, Griptec is specified by major consultants worldwide. In the United Kingdom, Griptec holds all three CARES splicing product certificates: TA1-A, TA1-B, and TA1-C.

For our distributors servicing rebar preparation, the Griptec solution is both convenient and productive. It is supported by a smart machine operated by a single operator, offers highly efficient cycle times (approximately 45 seconds per rebar prepared), and includes a test that systematically proof loads each and every bar/sleeve connection.

For contractors, Griptec provides a simple, effective, and reliable way to connect rebar in columns, diaphragm walls, and slabs. One application at Heathrow was for the roof of the new underground station. Griptec connections were also used to create temporary openings that allowed workers and equipment to move freely through the rebar structure and could easily be “closed” using single lengths of rebar with Griptec connections at both ends.

Thanks to its parallel-thread technology, Griptec does not require any specific torque wrenching and can be verified through simple visual inspection, offering a significant advantage in simplifying the project schedule and maximizing operational productivity.

Petronas RAPID

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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.

Ras Abu Aboud Stadium, the 2022 FIFA World Cup Venue

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Ras Abu Aboud Stadium, the 2022 FIFA World Cup Venue

Ras Abu Aboud Stadium is a football stadium under construction in Doha, Qatar, with a capacity of 40,000 spectators.

This project has been specifically designed to host the 2022 FIFA World Cup. The stadium features a modular design, incorporating recycled shipping containers, removable seats, and other modular building blocks. After the tournament, it will be completely dismantled and repurposed.

Dextra supplied more than 600 sets of carbon steel tension rods for the cross-bracing of the roofing and bowl structures, as well as for staircases, catwalks, and ramps. The tension rods range in bar thread size from M20 (diameter 19 mm) to M72 (diameter 70 mm).

Upon its expected completion in 2020, Ras Abu Aboud Stadium will set a new standard in sustainable construction design.

Egypt’s record-breaking wastewater treatment facility

Posted on by Sir Gwi

Egypt’s record-breaking wastewater treatment facility

The Bahr El Baqar wastewater treatment plant is located in the northern governorate of Port Said and has a daily output capacity of 5.6 million cubic meters. It is a joint venture between the Arab Contractors Company and Orascom Construction.

The plant is the world’s largest of its kind, holding three Guinness World Records:

  • The largest water treatment facility, processing 64.8 cubic meters per second
  • The largest sludge treatment plant
  • The largest single-operator ozone generating plant

Dextra is proud to contribute to this project by supplying Rolltec rebar couplers for the reinforcement of the plant’s concrete structures.

Rolltec is a CARES-approved, rolled parallel-threaded mechanical splicing system designed for connecting concrete reinforcing bars from Ø12 to 50 mm (ASTM #4 to #18). It offers fast and easy preparation and installation on-site.

Source of images: https://www.arabcont.com/english/project-624

Dubai Airport

Posted on by Sir Gwi

Dubai Airport

Dubai Airport is the main airport in the United Arab Emirates. The famous airport, located just a few kilometers north of Dubai city, is home to the renowned Emirates airline. Dubai International Airport is the world’s #1 airport in terms of international passenger traffic.

Dextra Middle East, also based in Dubai, has been involved in numerous projects related to the construction of Dubai Airport, particularly from 2003 to 2005, during the development of Terminal 3 and the associated concourses.

For the Dubai International Project, Dextra supplied its popular Bartec coupler solution, the leading rebar coupler solution in the UAE. A total of 1.5 million couplers were used at Dubai International Airport.

Superstructure

Bartec couplers provided a technical solution for reconnecting second-phase reinforcement between columns and beams, as well as between walls and beams.

Rebar couplers were also used to create temporary openings in the reinforcement, allowing the passage of personnel and equipment.

Foundations

Bartec couplers were utilized for the foundation piles. In this application, the couplers became part of a highly integrated and automated cage manufacturing process, enabling the quick connection of large-diameter rebar and maximizing cage production output.

To complement the Bartec rebar coupler solution, Dextra Sonitec tubes were used to ensure the swift installation and reconnection of the sonic tubes along the entire length of the cages. Sonitec tubes are particularly easy to install due to their Push-Fit rubber mouth and easy to set up in the cage thanks to their welded heads. Over the years, more than 1,800,000 meters of Sonitec tubes have been installed at Dubai International Airport!

Bangkok BTS

Posted on by Sir Gwi

Bangkok BTS

The Bangkok Mass Transit System (BTS) is a large urban skytrain system located in Bangkok, the capital of Thailand. The system was inaugurated in 1999.

As of 2017, the system consists of 24 elevated stations and 37 km of elevated rail organized into two main lines crossing each other at Siam central station.

The BTS system is undergoing an extension of its two main lines, with line segments and stations expected to enter into operation in 2019 and 2020.

Foundations

For various packages over the years, Dextra has supplied Sonitec tubes, which are used to test the concrete pile foundations beneath stations and tracks.

In total, Dextra supplied approximately 40,000 linear meters of Sonitec tubes, a distance actually equivalent to the BTS system’s length itself.

Pylons

For pylon vertical bar connections, Dextra offered its Bartec solution.

Bartec allows contractors to conveniently splice prefabricated rebar cages using a simple rebar coupler, allowing savings in steel compared to overlap splicing and accelerating site operations.

In Thailand, the threading operation is supported by Dextra’s factory, conveniently located in the northeast of Bangkok. Contractors receive the rebar already prepared and mounted with their rebar coupler.

Cylingas Reservoirs

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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.