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New Extradosed Ganga Bridge

New Extradosed Ganga Bridge

The six-lane extradosed bridge over the Ganga River in Prayagaraj will span for 9.9 kilometers, with the main bridge covering 3.84 kilometers and the approach segment covering the remaining distance.

The 3.84-kilometer stretch would include 67 pillars and 17 pillar foundations. Also, of this 3.84 km, the span of 860 meters will be extradosed bridge, and the rest will be a precast segmental bridge with a span of 50 meters.

Dextra supplied 20,000 Sonitec tubes, an easy-to-assemble and time-saving tube solution used for the CSL (crosshole sonic logging) testing of foundation piles to determine the structural integrity. The tubes were installed in piles that were 30 to 36 meters deep and had a diameter of 1.2 meters.

The bridge will start from the Pratapgrah road, gain height to over cross the existing Y-junction (going towards Lucknow) and would then cross the Ganga from Kacchar area spanning over Beli village before ending at Stanley Road. It is expected to be in operational in 2024.

New Storstrøm Bridge

New Storstrøm Bridge

The New Storstrøm Bridge is a testament to Denmark’s commitment to improving transportation infrastructure and connecting the country’s islands more efficiently. Stretching over the Storstrømmen strait, this bridge will replace the aging Storstrøm Bridge, which has served as a vital connection between the islands of Zealand and Falster since 1937.

The New Storstrøm Bridge is designed to accommodate not only vehicular traffic but also pedestrians and cyclists. Its innovative architecture and engineering are set to reduce travel time, improve safety, and provide a reliable link between these two major Danish islands.

Dextra, with its expertise in engineering construction solutions, has supplied 120,000 Rolltec couplers and headed bars for connecting pile reinforcement cages. These components are essential for the construction of the bridge’s foundation, ensuring that the piles are securely interconnected to support the immense weight and forces the bridge will experience during its lifetime.

In addition to our contribution to the bridge’s foundation, we have also supplied Unitec couplers for repair applications, connecting installed rebars with no threads. With Dextra’s contributions, this bridge will serve as a lifeline between Zealand and Falster for generations to come, connecting people, communities, and opportunities.

Nanay Bridge

Nanay Bridge

The Nanay Bridge is a 2.2km bridge crossing the Nanay River, north of the city of Iquitos, Peru.

The bridge will connect the district of Bellavista on the right bank of the Nanay River with the district of Santo Tomas on the left bank.

With a population of almost half a million people, Iquitos is the largest city in the world that cannot be reached by road – tucked in the Peruvian Amazonia jungle, it is currently accessible only by river and air.

Thanks to this project, the city will finally be connected with the rest of the Loreto Region.

The main structure is a cable-stayed bridge with a main span of 242m and total length of 424m. The approach structures are 1.2km long on the right bank of the river, and 320m long on the left bank of the river.

The bridge carries two lanes of traffic and two pedestrian walkways. The roadway has a total width of 12m, and each pedestrian walkway is 1.2m wide.

It uses light-weight composite steel concrete to minimize the use of concrete and to reduce loads transferred to the foundations.

For this project Dextra has supplied 100,000 Bartec couplers for rebar connection and 30,000 headed bars for shear reinforcement of the anchors.

Once completed, it will be the longest bridge in the Country.

Suvarnabhumi Bangkok International Airport – Phase 2

Suvarnabhumi Bangkok International Airport – Phase 2

Suvarnabhumi Airport is the main international airport of Thailand, operating both domestic and international flights and acting one of the main gateway to South East Asia for travelers in the region. The airport is located at the East of Bangkok, less than 15mn from Dextra main manufacturing facility.

Dextra has involved in the construction of the airport since the beginning in 2001, and has still contributed to the airport’s latest expansion projects.

Suvarnabhumi Airport’s second phase expansion is intended to increase the airport’s annual passenger handling capacity to 60 million passengers and provide an additional 28 gate assignments for international flights, bringing the service up to international standards and improving the convenience of passengers and airlines in a total area of 960,000 square meters.

More than 600,000 Bartec rebar couplers have been used extensively in all parts of the airports, including beams, columns, diaphragm walls and pile cages. This popular rebar splicing solution allow for a safe and reliable connection of rebars, for both vertical or horizontal applications.

The solutions were deliverd with rebar preparation equipment, along with our trained experts, to ensure that production requirements were met in a timely manner.

Moreover, RepairGrip and Unitec couplers were also used for the connection of 2 rebars with no thread or rebars that have splicing issue.

Fécamp Offshore Wind Farm

Fécamp Offshore Wind Farm

The 497 MW wind farm, located between 13 and 22 kilometers off the coast of Fécamp, France, includes 71 Gravity Based Structures (GBS: Gravity Based Structures), each of which will support a 180-meter-high windmill. The project will generate electricity equivalent to the power needs of more than 416,000 homes.

Dextra Fortec couplers and headed bars were supplied for these benefits.

Fortec couplers

  • Used for temporary openings to facilitate the movement of materials and personnel during the various stages of construction.
  • Acted as concrete wall starter bars to connect with continuation bars.
  • Aided constructability with climbing formwork for fast cycle GBS building.
  • Improved rebar congestion, avoiding overlapping splices.
  • Dextra couplers are based on a Parallel Thread technology. The same couplers are used for standard connection (when the continuation bar can be rotated) and position connection (when neither bar can be rotated). For Fécamp, the site was equipped with sets of threading equipment.

    Headed bars

  • Improved buildability and on-site productivity by reducing rebar congestion and the steel/concrete ratio.
  • Can be used as shear wall cross ties as an alternative to rebar with hooked anchorage.
  • Suitable for sequenced concrete pours.
  • Suitable for seismic design.
  • Fast to install: reduced labour and crane time.
  • Head can be removed for ease of rebar positional adjustment.
  • Improved concrete compaction and surface quality (reduction of honeycombing).
  • Dextra headed bars were used as an efficient solution for the vertical reinforcement of the foundation. They are an excellent alternative to standard hooked bars, which are difficult to install, particularly when bent on both ends, and to a bonded length of straight or bent rebar acting as an anchorage.

    Download the project case study

    Karachi Nuclear Power Plant (KANUPP)

    Karachi Nuclear Power Plant (KANUPP)

    Karachi Nuclear Power Plant (KANUPP), Pakistan’s first nuclear plant, is undergoing a 2.2GW capacity extension with two pressurized water reactor units of Chinese design (PWR, Hualong 1).

    This historical power plant has been in service with a single 137MW reactor unit (Kanupp-1) since 1972. It is owned and operated by Pakistan Atomic Energy Commission (PAEC).

    The construction of the Kanupp-2 and Kanupp-3 reactors begun in August 2015 and May 2016, with the start of commercial operations scheduled for 2021 and 2022, respectively.

    Dextra Griptec coupler was selected for the connection of steel rebars to reinforce the reactor’s concrete shell, designed to successfully withstand an aircraft crash (APC).

    More than 1 million units of Griptec standard, position, and transition couplers, mainly in diameter 40mm, have been delivered.

    Griptec is well-known for its reliability and performance in tension, compression, and fatigue, thanks to the unique design of the product that complies with the world’s most stringent projects specifications, especially for nuclear reactor building construction.

    Fujairah Port

    Fujairah Port

    Port of Fujairah, in the emirate of Fujairah and strategically located on the Gulf of Oman, is the only multi-purpose deep sea port on the Eastern seaboard of the United Arab Emirates. It is located just 130 km South from the Strait of Hormuz.

    Dextra has been involved in the expansion of the port between 2007 in 2008.

    Oil Terminal 2

    For the new Oil Terminal 2 (OT2), Dextra engineered and supplied the Marine Tie Bars systems used the the anchoring of the Main Quay walls.

    More than 1,400 tons of bars have been provided for this large project.

    South Breakwater Berths

    In 2008, Dextra also engineered and supplied the Marine Tie Bars systems anchoring Tugs Jetty, Craft Docks & Main Quay Wall. Short Marine Tie Bars assemblies were installed between King Pile Walls. High performance Grade 700, which allow a high level of performance for relatively smaller diameters, was preferred to ease transportation and installation at site.

    Bangkok Arena

    Bangkok Arena

    The Bangkok Arena is a multisport indoor arena located in the Nong Chok district East of Bangkok. The arena was commissioned to host futsal tournaments, an indoor version of football. Nowadays the arena also hosts volleyball and basketball event as well as concerts. The arena can sit up to 12,000 people.

    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 concrete pylons and act as suspenders to hold the building roofing’s structrure.

    For this project Tension Bars were supplied in Grade 700, the highest in our range. Highest grade allow a better performance/steel ratio and therefore make it possible to pick smaller diameter. This results in a thinner structure and overall better aesthetics. Moreover, diameter bars and lighter elements also ease handling and installation operations at site.

    Each segment of bar is spliced to the next one by the use of coupler (no length adjustment) or turnbuckle (length adjustment and tensioning possible).

    Connection to the concrete structure is performed thanks to fork ends set up onto steel gusset plates.

    In total, those are more than 129 tons of Tension Bars which are anchoring the roof structure, with tendons exceeding 30 meters.

    Chaglla Dam

    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

    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.

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