Dextra Group | Reliable Connections

Bakheng Water Treatment Plant

Bakheng Water Treatment Plant

The Bakheng Water Treatment Plant is located in the Bakheng district of Phnom Penh, Cambodia. It is being constructed to improve the area’s water supply and is expected to increase drinking water delivery capacity by 60% to accommodate substantial urban expansion.

The project includes a drinking water treatment plant and transfer pipelines, which will eventually provide clean water to over 1.5 million residents in northeastern Phnom Penh.

By the end of Phase 1, the plant is expected to be operational, supplying drinking water to more than 750,000 inhabitants. Upon completion of Phase 2, its capacity will be doubled.

The project scope includes earthworks and soil treatment, civil engineering design, equipment installation, power supply, and system automation.

Dextra supplied Glass Fiber Reinforced Polymer (GFRP) rebars, which were installed in bored piles instead of traditional steel rebars. This facilitated the TBM (Tunnel Boring Machine) breakthrough in the underground waterway tunnel.

Suvarnabhumi Bangkok International Airport สนามบินสุวรรณภูมิ

Suvarnabhumi Bangkok International Airport

สนามบินสุวรรณภูมิ

Suvarnabhumi Airport is the main international airport of Thailand, serving both domestic and international flights and acting as one of the primary gateways to Southeast Asia for travelers in the region. The airport is located east of Bangkok, less than 15 minutes from Dextra’s main manufacturing facility.

Dextra has been involved since the beginning of the Suvarnabhumi construction in 2001 and continues to play a role in the airport’s latest expansion projects.

Over the years, Dextra has provided a wide range of technical solutions to support various contractors on different parts of the project.

For foundation piles, diaphragm walls, columns, beams, and other concrete structures, Bartec rebar couplers have been extensively used throughout the airport. This popular coupler solution ensures safe rebar connections, both vertical and horizontal. In Thailand, Dextra also handles rebar preparation services, which are carried out at our own threading yard in Bangkok.

The terminal roofs and concourses were designed to use Dextra Tension Rod Systems as cross-trusses. These high-performance large bar systems are easy to install and adjust in length, thanks to their fork ends and in-line connectors, while also contributing to the overall aesthetics of the terminal structure.

For the plane remote parking area, where aircraft fine-tune communications with the control tower, Dextra supplied large-diameter FRP dowel bars to connect the tarmac concrete slabs. Dextra’s FRP bars offer similar tensile performance to steel bars but help reduce the interference typically associated with metallic structures.

Riyadh Metro

Riyadh Metro

The Riyadh Metro is a massive urban transit system project under construction in Riyadh, Saudi Arabia. The project will feature 85 stations built along six transit lines, with a total rail length of 176 km. The system is expected to serve at least 1 million passengers daily upon its inauguration in 2018.

For this large infrastructure project, Dextra has been involved in various stations and packages.

Excavation Works

Before proceeding with general construction works, during the early excavation phase, retaining walls must be anchored back into stable ground to prevent any wall displacement. This will allow excavation to continue safely.

For that purpose, Dextra supplied steel ground anchors installed at the station perimeter. Each system consists of a high-tensile fully threaded bar, accompanied by a nut and plate, and grouted to bond with the soil.

For more information, please refer to the Steel Ground Anchors page.

Raft and Vertical Connections

Bartec rebar couplers were supplied for the works in the stations. Couplers were used for slabs, columns, and wall connections. A typical application on this project was to cast rebar couplers in the concrete with reinforcement and then proceed with second-phase bar connections at a later stage.

Unitec bolted couplers have also been used in various parts of the project. Typically, Unitec is used when overlap is planned but the lapping length appears to be too short to perform a safe splice. In that case, Unitec provides a convenient and full-performance connection.

Karimun Yard

Karimun Yard: A Key Fabrication Facility in Indonesia

The Karimun Yard is located on the small island of Karimun, Indonesia, less than 25 km from Batam and Singapore. Operated by Saipem, the yard offers over 780,000 sqm of fabrication areas with an annual production capacity of 50,000 tons.

Between 2009 and 2010, Dextra manufactured and supplied large Marine Tie Bars for Saipem, which were incorporated into the main quay wall. Additionally, in 2008, Dextra supplied Marine Tie Bars and Waling Beams, connecting the sheet pile walls of the service jetty.

Marine Tie Bar Systems: High-Performance Solutions:
For the main yard, Dextra supplied its Grade 700 Marine Tie Bars, the highest grade in the range.

  • Higher tie bar grades allow for high performance while reducing the size and weight of the bars, making transportation and installation easier.
  • Grade 700 also enables design optimization, allowing bars to be spaced further apart, thus reducing the total number of bars required for the project.

Connection & Splicing Systems:
To connect the bars to the walls, ball cages were used.

  • When used with a bearing plate embedded in the wall, ball cages allow a multidirectional adjustment angle of 10° for greater installation flexibility.
  • To splice bar segments, couplers were also used, ensuring a strong and secure connection.

For more information about our marine solutions in Asia Pacific, please consult our Bangkok

*CF Saipem Yard Sheet 07.2014

São Paulo Arena Corinthians

São Paulo Arena Corinthians

The São Paulo Arena Corinthians is a football and multipurpose stadium that was built between 2011 and 2013 in preparation for the 2014 FIFA World Cup in Brazil.

The stadium has a capacity of 49,000 people, making it the fifth-largest stadium in Brazil in terms of capacity.

For the construction of the stadium, 80% of the structural elements were made using precast techniques, with 40% of them produced directly at the precast plant set up on-site.

For this project, Dextra delivered its Rolltec rebar coupler solution to Odebrecht, the main contractor.

On the São Paulo Arena Corinthians project, Rolltec rebar couplers were used inside the precast elements to provide connections between slabs, beams, and columns.

To allow the use of a coupler in the precast element, a rebar with an A-type thread is cast into the precast element, with its thread being protected by a pocket former.

rolltecpocketformer

Once set in its final location, the pocket former is removed, and the space around the thread allows for a Rolltec coupler to be conveniently screwed onto the opposing rebar (B-type thread). More than 45,000 Rolltec couplers were used for the rebar connections at Arena Corinthians.

The coupler solution was supported by a Rolltec rebar preparation machine, installed on-site, and the Dextra team of engineers was in charge of training operators and implementing preventive maintenance to ensure the equipment was used at its maximum capacity.

Reventazón Hydroelectric Dam

Reventazón Hydroelectric Dam

The Reventazón Dam is a concrete-face rock-fill dam built on the Reventazón River in the Limón province of Costa Rica. Inaugurated at the end of 2016, it is the largest power station in the country, with a total capacity of 305 MW. The project has become a model of environmental integration, featuring passages for wildlife.

For this major dam project, Dextra Latin America continuously supplied and supported contractor ICE from 2010 to 2016. Dextra provided its Rolltec rebar splicing solution, couplers, and machinery. Rolltec is the most popular rebar splicing solution in Latin America, offering a competitive alternative to lap splices.

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

Rolltec splices were used inside the water tunnels, installed on bent rebar. For this type of application, the straight bar must first be threaded and then bent. During the bending operation, a coupler may be temporarily fitted onto the bar end to protect the thread.

Dextra Rolltec couplers were also installed in the tall structure (130 meters high) as a method for splicing rebar vertically.

Kuwait International Airport Expansion: Terminal II Building

Kuwait International Airport Expansion: Terminal II Building

Kuwait International Airport is the country’s main airport, located to the south of Kuwait City. The hub currently handles more than 9 million passengers annually and is home to the renowned Kuwait Airways, Jazeera Airways, and Wataniya Airways.

A new state-of-the-art terminal

This new infrastructure is part of the airport’s expansion project, aimed at enhancing its status as the State of Kuwait’s gateway. When completed, the Terminal II building will form a triangular shape, symbolizing Kuwait and reflecting the country’s rich culture and civilization.

Scheduled for completion in 2020, this striking five-story terminal building will be capable of handling 25 million passengers annually and will be connected to the first terminal via a tunnel.

From the foundations to the roofs

For this project, the lead Turkish contractor Limak Holding and its Kuwaiti agent Kharafi National selected Dextra’s Rolltec rebar coupler solution for rebar splicing in all the building’s concrete structures. Thanks to its rolled-parallel threaded system, along with its simple preparation and installation process, this splicing solution helps shorten construction cycle times.

For the terminal’s impressive structure, the contractors also chose Dextra’s high-performance Smooth Post-Tensioning Bar Systems. Featuring smooth carbon steel bars and rolled threads, the high-tensile PT Bar system offers exceptional fatigue and strength performance, as well as high impact resistance.

For more information about our products, including rebar splicing and engineered bar systems, please contact the Dextra team in Dubai.

Pune Metro UG 04 – Swargate Metro Station

Pune Metro UG 04 – Swargate Metro Station

Pune Metro is an under-construction mass rapid transit system that comprises three lines with a total length of 55 km. The Metro is in the Pune Metropolitan Region, Pune City, India.

Swargate Station is part of the 17-km Line 1 running from PCMC Building to Swargate. Lines 1 and 2 were expected to become operational in 2021, while the elevated Line 3 was scheduled for completion one year later.

For this project, Dextra supplied more than 1,700 steel active anchors to stabilize vertical retaining walls around the excavation area.

Dextra’s Geotec Steel Active Anchor is the preferred solution for excavation projects requiring post-tensioning.

Active Anchor

 

Active Anchors

The anchors are corrosion-protected and designed with high-tensile, fully-threaded bars that help prevent deformation of the retained structure.

Once the construction of Pune Metro UG04 is completed, the underground station at Swargate will be a strategic part of a multimodal transit hub connecting to city bus services and parking facilities for private vehicles.

Hyosung LPG Cavern

Hyosung LPG Cavern: A Large-Scale Petrochemical Storage Project

This multi-phase project, developed by Hyosung Group, includes the construction of:

  • A propane dehydrogenation (PDH) production plant
  • A polypropylene (PP) plant
  • A liquefied petroleum gas (LPG) storage tank
  • Warehouses for LPG and petrochemical products

The entire complex will span 60 hectares within the Cai Mep Industrial Zone in Ba Ria-Vung Tau, near Ho Chi Minh City, Vietnam.

Dextra is supporting the construction of the 240,000-ton LPG underground storage facility by supplying 30,000 units of glass fiber-reinforced polymer (GFRP) rock bolts. These bolts are used to consolidate the cavern rock face around the 150-meter-deep excavation area.

To effectively prevent oil leakage, seawater will be injected into the surrounding rock, creating a water curtain. Given the highly corrosive environment, GFRP rock bolts are the ideal solution due to their corrosion resistance.

Advantages of Dextra GFRP Rock Bolts:

  • Cuttable mining anchors based on fully threaded GFRP tendons
  • Available in seven diameters (ranging from 20 mm to 40 mm)
  • Delivered with GFRP plates and nuts
  • Lightweight, making them easy to handle, transport, and install inside the tunnel

The facilities are expected to begin commercial operation in 2020.

New International Airport for Mexico City

New International Airport for Mexico City

The Mexico City New International Airport is a major infrastructure project designed by Sir Norman Foster and launched in 2014. It aims to provide Mexico’s capital with a state-of-the-art airport hub by 2020. The project is located to the east of Mexico City and is set to accommodate an annual passenger capacity of 68 million, surpassing the previous Benito Juarez Airport, which currently handles 41.7 million passengers annually and is the busiest airport in Latin America. The project features an X-shaped passenger terminal, three runways, and a control tower.

For this, the largest infrastructure project in Latin America, Dextra has been involved in supplying its Bartec rebar couplers for the foundations of the terminal building (contractor ICA), the transport building (contractor Sacyr), and the control tower (contractor Aldesa).

Bartec couplers, often preferred in seismic areas like Mexico, replace the traditional lapping of large ASTM #12 rebar (equivalent to 38mm) on this project. For such large diameters, it is both faster and more cost-effective to connect bars with couplers rather than using traditional overlapping methods.

Bartec rebar coupler equipment a the New Interational Airport of Mexico construction site

Dextra has provided Mexico Airport with up to 10 sets of Bartec equipment (a total of 30 machines, with each set delivered in a container) for all rebar preparation operations. This impressive setup has been supported by our local After Sales team, who have trained the machine operators and maintained the equipment to ensure optimal productivity.