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Category: Projects

Flamanville EPR

Posted on by Sir Gwi

Flamanville EPR

Flamanville is the first reactor built after the new generation EPR design (European Pressurized Reactor), after a 100% Chinese design. It will have a capacity of 1.3GWe when entering service in 2019.

Dextra has been present on site since the beginning of the construction works in 2008 and until 2015.

For this challenging project, Dextra has been supplying its Griptec rebar splicing solution through its local fabricator partners. The rebar preparation was supported by an additional machine placed at site.

Griptec is the preferred rebar splicing solution of the nuclear industry thanks to its unique performance level and an automatic testing process which systematically tests all the connections produced as part of its standard cycle: a guarantee that 100% of the connections perform above project requirement.

More than 800,000 Griptec connections have been used on the project, including 400,000 position assemblies, allowing to connect large diameter rebar without rotating them. The Griptec connections have been installed on reactor building and APC shell, as well as auxiliary buildings.

In particular, Griptec have been used for the connections of large prefabricated panels.

 

Four sided panels with Griptec female sleeves and bridging studs

Four sided panels with Griptec female sleeves and bridging studs

 

Thanks to its Bridging Assemblies, square panels could be reconnected on four sides while coping for possible misalignment that occur when lifting the cage.

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Hanoi Nhật Tân Bridge

Posted on by Sir Gwi

Hanoi Nhật Tân Bridge (Vietnam – Japan Friendship Bridge)

The Nhat Than Bridge is an impressive cable-stayed bridge spanning over the Red River and located North of Hanoi. The total length of the project is 8.9 km, including the actual3.75 km bridge.

The bridge is the new gateway to Hanoi as it greatly reduces the transport time to Hanoi Noi Ban Airport, the second busiest airport of Vietnam in passengers.

The bridge was inaugurated by the Ministry of Transport of Vietnam and opened to the public on the 4th of January 2015. The bridge has since theen been renamed “Vietnam – Japan Friendship Bridge).

Dextra has been involved on the Nhat Tan bridge since the early stage of the project by supplying the popular Bartec rebar couplers, the main rebar splicing solution in Vietnam. Bartec connections were used in various part of the project: approaches, foundation piles, pile caps and approaches.

Bartec couplers make a convenient rebar splicing solution as the same standard coupler can be used for standard connection (rotating rebar into coupler) and position connection (rotating only coupler, when it is impossible to rotate rebar). Dextra supplied more than 130,000 connections in total for this project for the lifting of heavy elements.

For the temporary operations of lifting and fixing of the girder precast segments, Dextra also supplied 36 tons of high-tensile PT bars.

Ciel Tower Dubai

Posted on by Sir Gwi

Ciel Tower Dubai

Ciel Tower is an 82-storey high-rise building under development in Dubai Marina. With a total height of 365 meters, the building is set to become the world’s tallest hotel upon its completion, scheduled in late 2023.

The tower is situated at the heart of the Marina, near popular attractions like the Marina Walk and the Marina Mall shopping and entertainment complex. It will house 1,042 luxury suites with a rooftop that hosts a pool bar, a restaurant, and an observation deck.

The structure is heavily inspired by the concept of vertical living, to maximize views of Palm Jumeirah, Blue Waters Island, Dubai Harbour and the Arabian Gulf.

Dextra has supplied 180,000 Bartec couplers for the connection and enhancement of rafts, columns to beams, slabs to core walls, core walls and starter bars.

Ciel Tower is a remarkable project that will become a new landmark and further enhance Dubai’s reputation as one of the world’s most popular touristic destinations.

Source of images: https://www.archdaily.com/931860/ciel-the-worlds-tallest-hotel-is-under-construction-in-dubai-marina, https://propsearch.ae/dubai/ciel-tower

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India’s Tallest Commercial Building built with Precast Technology

Posted on by Sir Gwi

India’s Tallest Commercial Building built with Precast Technology

Orbit is a 25-storey office building located strategically in the heart of the IT Hub of Hyderabad being constructed with precast technology. It is the tallest commercial buildings in India made with precast technology.

The Orbit building constructed by Aurobindo Realty was awarded the “Best Office Architecture India” award by International Property Awards- Asia Pacific Property Awards 2018.

As it is designed with Precast technology, the building is also proposed for LEED V4 Gold Rating from USGBC, a certification that guarantees our commitment to environmental friendliness and sustainability.

Dextra Groutec played a key role in precast element connection. Around 60,000 couplers were installed in the precast elements at the precast factory, and then transported to the site to perform a grout connection.

Groutec couplers are widely used in response to the increased demand for modular buildings around the world, especially during this Covid-19 outbreak with more requirements for healthcare and quarantine buildings. They are designed and manufactured in accordance with Eurocode 2, BS 8110, ACI 318, IBC, and AASHTO.

Source of images: https://www.aurobindorealty.com/portfolio/orbit/

Cartagena Viaducto Del Manglar

Posted on by Sir Gwi

Cartagena Viaducto Del Manglar

The Viaducto del Manglar project is a 5.3 km bridge project spanning over the Ciénaga de la Virgen (swamp), north of the City of Cartagena, Colombia. The project aims to reduce traffic congestion when exiting the city in the Zona Norte (North Area).

The viaduct, which aims for opening in 2018, is part a longer highway project linking the city of Cartagena with the city of Baranquilla.

For this project in Colombia, Dextra has been supplying contractor Rizzani de Eccher with Rolltec rebar couplers and Headed Bars. Rebar preparation operations has been performed by Dextra distributor in Colombia.

Headed Bars were used in precast caissons, installed below the bridge girders, as a way to reduce steel congestion in the heavily reinforced steel cages.

For more information about Dextra solutions in Colombia, please contact our regional Latin America office.
Copyright pictures: Consesion Costera

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Two IFC (International Finance Centre)| 環球貿易廣場

Posted on by Sir Gwi

Two IFC (International Finance Centre)| 環球貿易廣場

The Two IFC is a landmark skyscraper in Hong Kong, located in West Kownloon. The commercial building is 412 meters high and features 88 floors. It is the second tallest building in Hong Kong, right after the ICC Tower.

Vertical reinforcement is by definition a key feature for buildings of that height. Consultant ARUP and contractorsE-Man-Sanfield JV picked Dextra for the splicing of reinforcement across the building.

For this project, Dextra supplied more than 200,000 rebar couplers. Those were used to perform most vertical connections on the structure, in particular all columns.

Rebar couplers also provided connection points for second phase rebar reconnection. Typically between columns and slabs, and between columns and beams. To do so the rebar coupler are aligned horizontally and cast in concrete. Reconnection is only performed at a later stage by screwing in second stage rebar.

Bartec is the preferred reinforcement splicing solution of contractors in Hong Kong as the solutionis recommended in the Hong Kong Building Material List.Dextra also operates its own rebar threading workshopin Hong Kong, providing the rebar preparation service for its customers.

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Mandovi River Cable Stayed Bridge

Posted on by Sir Gwi

Mandovi River Cable Stayed Bridge

The 3rd bridge over the river Mandovi in Goa is an iconic bridge that connects Panaji in Tiswadi Taluka and Porvorim in Bardez Taluka in between the existing two bridges to ease traffic congestion along this route. It was declared open on January 27, 2019.

As one of the longest cable stayed bridges in India, the 4-lane, 21m-wide, 620m-long continuous span, 3.6 km Mandovi River Cable Stayed Bridge adds architectural beauty to Panaji, standing tall 70m above sea level with the central concrete pylons spaced at 150m, supported by 88 cables on a single plane, harp type cable stay arrangement.

Dextra supplied 1,170 sets of fully-threaded post-tensioning bar systems in diameter 25, 32, 40, 50 and 75mm, in grade 830/1030 for use in various applications.

  • Hanger bars
  • Vertical prestressing
  • Horizontal prestressing bars
  • Lifting bars
  • Anchoring pier head segment with pier cap
  • Anchoring front support to the pier cap
  • Anchoring of front cantilever support to the pier cap
  • Anchoring of middle, rear, and auxiliary supports
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    King Abdullah Financial District

    Posted on by Sir Gwi

    King Abdullah Financial District

    King Abdullah Financial District (KAFD) is a multipurpose business and residential complex located in Riyadh, Saudi Arabia. The district consists of more than 50 towers and should ultimately host a working population of around 12,000 inhabitants.

    Dextra Middle-East, also located in Dubai, has been involved from2009 for the supply of several building packages to Saudi Bin Ladin Group, the main contractor on the project.

    Foundations piles

    In order to provide vertical connection in foundation piles, Dextra supplied through its partners fabricators its popular
    Bartec rebar coupler solution, the #1 rebar splicing solution in the Middle East.

    As a complement to Bartec couplers, Dextra also supplied Unitec couplers, which were used for the continuation of bars protruding from the foundation piles. Unitec is a flexible solution for contractors as the bar end doesn’t need to be prepared in advance. It only requires an impact wrench and therefore it is easy to operate on remote building sites.

    Raft and Columns

    Bartec couplers were also used for the horizontal connection in the thick foundation rafts, and vertically in the protruding columns.

    Corewall-to-beam applications

    In the building superstructure, Dextra Bartec couplers were used to provide horizontal connection from the corewall, allowing to insert the second phase starter bars needed to create the beam reinforcement.

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    New Champlain Bridge

    Posted on by Sir Gwi

    New Champlain Bridge

    The new Champlain Bridge is a 3km long bridge spanning over the Saint Lawrence River at the South-East entrance of Montreal, in the province of Quebec (Canada). The Champlain Bridge is one of the busiest bridges in Canada and plays an important economical role for its city as it is part of the main itinerary to the United States, accessible 60-km South.

    Replacement of the older Champlain bridge

    The New Champlain bridge will actually replace the existing Champlain bridge, commissioned in June 1962. The structure of the older bridge started showing signs of corrosion since 1994. After several temporary solutions to ensure safety of users and keep the bridge open, a new replacement project has been in the works since 2007. For some times the two bridges will be next to each other until the older structure is completely removed, with most of its structure planned to be recycled.

    A focus on corrosion resistance

    As the New Champlain Bridge is designed to operate at least 125 years and handle 50 million car crossing per year. Because of the relatively corrosive environment caused by the frequent de-icing on the road, a strong focus was made on the corrosion resistance of the structure with duplex stainless steel rebar being installeed in critical areas.

    For this project, Dextra suggested the use Duplex Stainless Steel Rolltec couplers and anchors. This sub-range of our popular Rolltec solution substitutes the main products of our Rolltec range, coupler and anchors, by and improved alternative duplex steel version.

    The Rolltec solution is well fit for the Canadian market and approved by the Quebec Ministry of Transport. With a single operator threading equipment and 30sec cycles, it is highly productive, which is ideal for high-labor cost countries such as Canada.

    More than 10,000 Stainless Rolltec couplers have been delivered for this project, used mostly in the span of the bridge. Couplers were used to splice the reinforcement on large bars, from bar diameter 35M (#11) to 55M (#18), which is actually the largest diameter in our Rolltec range.

    In addition, about 10,000 Rolltec stainless steel end anchors have been delivered, for sizes up to 55M (#18). The Rolltec Headed Bars are using the same thread system as the coupler, simplifying production.

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    My Home GRAVA Hyderabad

    Posted on by Sir Gwi

    My Home GRAVA Hyderabad

    In the heart of Hyderabad, India, a towering testament to architectural excellence and engineering innovation is taking shape – the My Home GRAVA project. Comprising eight 43-storey towers, this mega project stands as a symbol of modern living and technological advancement in the construction industry. One of the key contributors to the success of this colossal venture is Dextra, a global leader in providing innovative solutions for the construction sector.

    Optimizing Design and Construction:

    My Home Construction, the visionary developer behind GRAVA, has left no stone unturned in ensuring the optimization of design and construction methodologies. From the early stages of planning, the focus has been on delivering a project that not only redefines luxury living but also sets new benchmarks for efficiency and sustainability in construction.

    Dextra Couplers: A Structural Revolution:

    At the core of GRAVA’s construction success is the implementation of 570,000 Groutec couplers and more than 70,000 Bartec couplers for all structural connections within the concrete frame. These couplers play a pivotal role in ensuring the structural integrity of the buildings, providing a secure and efficient connection between the precast elements.

    The Groutec and Bartec couplers are known for their high-performance capabilities, making them ideal for large-scale and complex projects like GRAVA. These couplers eliminate the need for traditional lapped splicing, offering a faster and more reliable alternative for connecting and reinforcing concrete structures and precast concrete elements. This not only accelerates the construction process but also enhances the overall durability and safety of the structure.

    As the My Home GRAVA project continues to rise and reshape the skyline of Hyderabad, it stands as a testament to the successful collaboration between visionary developers and innovative construction solution providers. Groutec and Bartec couplers have played a crucial role in the seamless construction of the eight 43-storey towers, contributing to the project’s efficiency, strength, and durability.

    The project not only promises a luxurious living experience but also sets a new standard for construction excellence in India, with Dextra’s contribution leaving an indelible mark on its success.

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