Chaglla Dam

Posted on November 4, 2022March 14, 2024 by Sir Gwi

Chaglla Dam

Chaglla Dam is a hydroelectric dam set up on the Huallaga River, in the Huánuco region of Peru. The dam is 203m heigh with an installed maximum capacity of 456 MW.

For this major dam project, Dextra continuously delivered to Brazilian contractors Odebrecht its Rolltec rebar coupler solution between 2012 and 2015.

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

The rebar preparation is supported by a unique light equipment, operated by a single operator. The Rolltec machine is relatively easy to transport and convenient to install even on most remote locations such as dam construction sites.

More than just couplers and equipment, Dextra also took in charge the machine commissioning and operator training, making sure the contractor team make the most out of their rebar coupler solution.

Doha Metro Msheireb Station

Posted on November 4, 2022March 15, 2024 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 November 4, 2022March 15, 2024 by Sir Gwi

Heathrow Airport Terminal 5

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

Dextra has been involved in the construction of Terminal 5 and associated structures.

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

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

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

On the contractor side, Griptec offered a simple, effective and reliable way to connect rebar in columns, diaphragm wall and slabs. One application at Heathrow was for the roof of the new underground station. Griptec connections were also used to provide temporary openings that allowed men and equipment to freely move through the rebar structure and be easily ‘closed’ using single lengths of rebar with Griptec connections to both ends.

Thanks to its parallel-thread technology, Griptec does not require any torque wrenching at a specific value and can be verified by simple visual inspection, a significant advantage to simplify the project schedule and keep operations as productive as possible.

Petronas RAPID

Posted on November 4, 2022March 14, 2024 by Sir Gwi

Petronas RAPID

Petronas RAPID (Refinery And Petrochemical Integrated Development) is a massive petrochemical complex located at the very south of state of Johor, Malaysia, across the sea facing the city-state of Singapore.

The RAPID development, commissioned in 2016, aims to add a 300,000 bbl per day of capacity to the existing local production, making it a strategic development for the Malaysian peninsula.

For this project, Dextra has supplied its Bartec system for the construction of the precast piperacks accross the the project. 30,000 Bartec Headed Bars were used to create horizontal anchoring points for piperacks beams.

The project was supported by a Bartec machine, installed directly at site and commissioned by the Dextra team.

Ras Abu Aboud Stadium, the 2022 FIFA World Cup Venue

Posted on November 4, 2022March 14, 2024 by Sir Gwi

Ras Abu Aboud Stadium, the 2022 FIFA World Cup Venue

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

This project has been specifically designed to accommodate the FIFA World Cup tournament in 2022: the stadium will have a modular design, using recycled shipping containers, removable seats and other modular building blocks that will be entirely dismantled and repurposed after the event.

Dextra supplied more than 600 sets of carbon steel tension rods for the cross-bracing of the roofing and bowl structures, as well as staircase, catwalk and ramps. The tension rods are ranging from bar thread size M20 (dia. 19 mm) to M72 (dia. 70 mm).

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

Egypt’s record-breaking wastewater treatment facility

Posted on November 4, 2022March 15, 2024 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, with 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 world’s largest water treatment facility, processing 64.8 cbm of water per second, largest sludge treatment plant, and largest single-operator ozone generating plant.

Dextra is proud to be a part of this project, 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 the connection of concrete reinforcing bars from Ø12 to 50 mm (ASTM #4 to #18). It offers fast and easy preparation and installation at site.

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

Dubai Airport

Posted on November 4, 2022March 15, 2024 by Sir Gwi

Dubai Airport

Dubai Airport is the main airport in the United Arab Emirates. The famous airport, located a few kilometer north of Dubai city, is home of the famous Emirates airline. Dubai International Airport is the #1 airport in the world in term of international passengers traffic.

Dextra Middle-East, also located in Dubai, has been involved on numerous packages of Dubai Airport construction, especially around the years 2003 to 2005, for the construction of Terminal 3 and associated concourses.

For Dubai Internal Project, Dextra has supplied its popular
Bartec coupler solution, #1 rebar coupler solution in the UAE. 1.5 million couplers have been used on Dubai International Airport.

Superstructure

Bartec couplers provided a technical solution to allow the reconnection of second phase reinforcement between columns and beams, and between walls and beams.

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

Foundations

Bartec couplers were used for the foundation piles. For that application, the couplers became part of a very integrated and automated cage manufacturing process, allowing to connect together large diameter rebar in a minimum time and maximizing cage production output.

As a complement to the Bartec rebar coupler solution, Dextra Sonitec tubes were used to ensure swift installation and reconnection of the sonic tubes all along the cages length. Sonitec tubes are especially easy to install, thanks to their Push-Fit rubber mouth, and easy to set up in the cage thanks to their welded heads. More than 1,800,000 meters of Sonitec tubes have been installed on Dubai International Airport over the years!

Bangkok BTS

Posted on November 4, 2022March 15, 2024 by Sir Gwi

Bangkok BTS

The Bangkok mass Transit System (BTS) is a large urban skytrain system located across Bangkok, the capital city 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 in two main lines crossing each other in Siam central station.

The BTS system is undergoing an extension of its two main lines with line segments and stations expected to enter in operations 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 below stations and rail.

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

Pylons

For pylon vertical bar connections, Dextra offered its
Bartec connection.
Bartec allows to conveniently splice prefabricated rebar cages by the use of a simple rebar coupler, allowing savings in steel compared to overlap and accelerating site operations.

In Thailand the threading operation is supported from Dextra’s factory, conveniently located in the North East of Bankgok. Contractors receive the rebar already prepared and mounted with their rebar coupler.

Cylingas Reservoirs

Posted on November 4, 2022March 14, 2024 by Sir Gwi

Cylingas Reservoirs

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

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

The assemblies were fixed onto the pilons by the use of gusset plates connected to the forks. Turnbuckles were used for the splicing in the lower part of the assembly, to ease installation. Turnbuckles allow some length adjustment and stressing of the assembly by bringing closer 2 segments of bars.

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

Download (.pdf)

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

Pune Cricket Stadium

Posted on November 4, 2022March 16, 2024 by Sir Gwi

Pune Cricket Stadium

The Pune Cricket Stadium is a cricket arena located near the city of Pune in the state of Maharashtra, India.

The stadium was designed by British firm Hopkins Architects and built in 2010-2011.

The stadium can host as many as 37,400 people and offers spectacular view over the surrounding mountains.

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

The long architectural bar systems are anchored onto steel pylons and suspend the roof structure.

The Tension Bar sets were supplied in steel grade 460. Each tendon is composed of several bar segments spliced together by the use of couplers (no length adjustment) or turnbuckles (length adjustment and tensioning possible).

In total, over 50 tons of Tension Bars which are anchoring the roof structure of the Pune Cricket Stadium.

Category: Projects

Chaglla Dam

Chaglla Dam

Doha Metro Msheireb Station