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Category: Projects

My Home GRAVA Hyderabad, India

Posted on by Sir Gwi

My Home GRAVA Hyderabad, India

 

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.

 

Mumbai Trans Harbour Link

Posted on by Sir Gwi

Mumbai Trans Harbour Link

The Mumbai Trans Harbour Link (MTHL) is a 22 km-long road bridge in India, connecting the Mumbai Metropolitan Region with its satellite city, Navi Mumbai.

Also known as the Sewri-Nhava Sheva Trans Harbour Link, the bridge begins in Sewri, South Mumbai, crosses the Thane Creek via a 16.5 km-long bridge, and terminates in Chirle village, near Nhava Sheva.

This colossal project features a 6-lane highway, 27 meters wide, along with two emergency exit lanes. Designed to accommodate approximately 70,000 vehicles per day, the bridge is expected to significantly reduce the notorious traffic congestion in the Greater Mumbai area.

Originally envisioned more than 35 years ago, actual construction only began in 2018. Once completed, it will be India’s longest sea bridge.

 

Dextra’s Contribution

Dextra played a key role in this project by supplying over 30,000 Sonitec sonic tubes. These tubes facilitate Cross Sonic Logging (CSL) testing, a method used to assess the structural integrity and homogeneity of concrete within barrette piles.

With a conveniently enlarged bell-mouth design, Sonitec tubes enable the seamless connection of two tubes, making installation quick and efficient within reinforcement cages.

 

CCTV Headquarters, China

Posted on by Sir Gwi

CCTV Headquarters, China

The CCTV Headquarters building is a landmark tower located in the Central Business District of Beijing. The tower houses the operations of China Central Television (CCTV) and has been one of the architectural landmarks of the Chinese capital since its completion in 2012.

For this project, Dextra was involved in providing China State Construction Engineering Corporation with an anchoring solution for the columns that ultimately support the building’s bridge-like complex architecture.

Anchoring the structure was particularly challenging due to the building’s height (234 meters) and its distinctive, complex shape. Additionally, since the building is located in a seismic zone, it needed to be constructed to withstand additional loads.

Dextra supplied high-tensile post-tensioning bar systems in large diameters. The post-tensioned system was designed to lock the metallic structure at the base of the mega columns and anchor them into a heavily reinforced mat.

The large PT systems (bars and plates) were equipped with additional corrosion protection accessories, including tubes and injection ports, allowing for grout sealing.

Valenciennes Bowstring

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Valenciennes Bowstring

The Valenciennes Bowstring is a 2-kilometer-long bridge construction project that will connect the Saint-Saulve roundabout with the Bruay-sur-l’Escaut roundabout (North). It features a 76-meter-long bowstring bridge, a double-girder engineering structure, a pedestrian footbridge, and a wildlife passage.

Dextra, in collaboration with its local partner, Freyssinet, supplied a tension rod system as a hanger for the bowstring arch bridge on the bypass, ensuring the structure’s stability.

The tension rod system is renowned not only for its high performance but also for its customizable parameters, including design load, surface finish, and corrosion resistance, to meet all technical and aesthetic project requirements.

 

Jumeirah Beach Residence, UAE

Posted on by Sir Gwi

Jumeirah Beach Residence, UAE

Jumeirah Beach Residence is a large waterfront residential complex located along the Persian Gulf in Dubai Marina, United Arab Emirates.

The residential area comprises more than 40 towers, many of which reach 40 stories. In total, Jumeirah Beach Residence can accommodate over 15,000 residents.

Dextra Middle East, also based in Dubai, was involved in numerous tower packages between 2003 and 2005.

Foundation Piles

To provide vertical connections in foundation piles, Dextra supplied its popular Bartec rebar coupler solution—the most trusted rebar splicing solution in the Middle East—through its fabrication partners.

As a complement to the couplers, more than 70,000 meters of Sonitec tubes were supplied to the piling contractor, offering a practical and safe method for assembling sonic tubes and significantly boosting productivity.

Raft and Columns

Bartec couplers were also used for horizontal connections in the thick foundation rafts and vertical connections in the protruding columns.

Core Wall-to-Beam Applications

In the superstructure, Bartec couplers were used for horizontal connections between the core walls and beams.

For this application, couplers were cast into the core wall, flush with the formwork. A thread protection cap, supplied by Dextra, prevented concrete leakage into the Bartec coupler.

At a later stage, continuation rebars, pre-threaded with Bartec threads, were connected into the pre-installed couplers, creating starter bars.

Pelješac Bridge

Posted on by Sir Gwi

Pelješac Bridge

The Pelješac Bridge construction aimed to connect the mainland to the Pelješac Peninsula, eliminating the need for ferry services and significantly reducing travel time between these regions. Dextra’s Fortec couplers played a pivotal role in connecting the pile reinforcement cages, ensuring the bridge’s structural stability.

A total of 85,000 Fortec couplers, in sizes ranging from 16-50 mm, and in Types A, B, and C, were used in the construction of the Pelješac Bridge. These couplers securely connected the pile reinforcement cages, ensuring the long-term stability and safety of this critical infrastructure.

Cebu-Cordova Link Expressway (CCLEX), colossal bridge in the Philippines

Posted on by Sir Gwi

Cebu-Cordova Link Expressway (CCLEX), a colossal bridge in the Philippines

Cebu–Cordova Link Expressway is one of the biggest infrastructure projects being undertaken in the Philippines. The project features a combination of a causeway, a gigantic cable-stayed bridge that will cross the navigable zone of the Cebu Strait, two viaducts, and four low-height bridges, as well as roadways and pedestrian walkways. The CCLEX Project aims to provide better transport facilities while reducing traffic congestion in the region, as well as to improve connectivity within Cebu City. It is also intended to support Cordova’s economic growth, as the expressway will position the city as the gateway for island tourism. Also known as the Third Mandaue–Mactan Bridge, the official groundbreaking of the toll bridge was in 2017, with the completion being scheduled for 2022.

Cable-stayed bridge to connect Cebu and Mactan Island

After its completion, the Cebu-Cordova Expressway will link the Cebu mainland and Mactan Island through Cordova town. The 8.5 km-long toll bridge will feature two lanes that will serve up to 40,000 vehicles a day. The main bridge will be built with a 400-meter cable-stayed main span, with 60-meter navigation clearance, allowing ships to easily navigate through the expressway. The main bridge of the expressway will connect the Guadalupe River to Shell Island in Cordova, while its colossal viaducts will link it to the causeway and road networks to Mactan.

Dextra Bartec, reinforcing solutions for the construction of the Cebu-Cordova Bridge

The design and the construction of this megaproject are undertaken by the Cebu Link Joint Venture (CLJV). The CLJV is a joint-venture partnership between the Spain-based Acciona Construccion S.A. and the Philippines-based First Balfour Inc. and D.M. Consunji Inc. For the reinforcement of the colossal expressway’s foundations, the contractor has chosen Dextra’s well-known rebar splicing solution Bartec. More than 35,000 units of Standard, Bridging, and Transition splices of steel grade 75, both in diameters 40 and 50, have been applied to the foundations’ piling cages as of July 2018. Moreover, to provide better end anchorages in congested areas, the CLJV opted for Dextra Bartec headed bars, which are also known as end anchors. Bartec end anchors are a convenient alternative to hooked bars, traditionally used for anchoring. For more information about rebar coupler availability in the Philippines, please contact our Bangkok office.

West Gate Tunnel

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West Gate Tunnel

The West Gate Tunnel Project will deliver a vital alternative to the West Gate Bridge, providing a much needed second river crossing, quicker and safer journeys, and remove thousands of trucks from residential streets.

The project will link the West Gate Freeway at Yarraville to the Port of Melbourne and CityLink at the Docklands via twin tunnels beneath Yarraville and an elevated Footscray Road.

The elevated road includes 300 piles of variable height. The piles have been precast in multiple segments, close to the site. Vertical post-tensioning bars assembly together all the segments of each pile.

This construction method of piles is more and more common but requires an impeccable preparation, both in terms of method statement and products definition. Each detail is fundamental for the success of the installation.

Dextra supplied Freyssinet with more than 1,000 tons of Freyssibar+ systems, grade 930/1080 MPa, with nominal diameters of 72mm and 55mm, and 7,500 anchorages for vertical permanent application.

With a close cooperation between DEXTRA, Freyssinet back-office (Technical Department and Freyssinet products company) and the job site staff (Freyssinet Major Project and Freyssinet Australia), the post-tensioning system has been perfectly adapted to the needs of the project.

The bar diameters, steel grade and the design of the anchorages have been validated through qualification tests according to Australian Standards, demonstrating the performance of the system.

This bar system can be used for post tensioning, prestressed ground anchors and any application involving temporary or permanent tie-rods, lifting, suspension, prestressed splices, etc.

Major project construction started in January 2018.

Mecca Mataf Expansion, Saudi Arabia

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Mecca Mataf Expansion, Saudi Arabia

Mataf is the area surrounding the Kaaba, the center of the holiest mosque in Islam, located within the Grand Mosque of Mecca. It is where the Tawaf, the counterclockwise circumambulation around the Kaaba, takes place.

The Mataf expansion is a large-scale project aimed at adding 1,300,000 sqm to the existing 400,000 sqm of space. The renovation will feature a new basement and three additional floors, increasing capacity for hundreds of thousands of additional worshippers.

For this significant project, Dextra Middle East has been involved in supplying rebar couplers and anchor solutions.

Mega Columns

For the mega columns, Dextra provided contractors with a solution to connect cages vertically while accommodating potential misalignment. This was achieved using Bartec caging assemblies, which allow for a misalignment adjustment equivalent to one bar diameter.

In addition to enabling reconnection, the Bartec caging assemblies were also used to temporarily lock the large column template (visible in red in photos) to ensure the correct setup of column reinforcement.

Mega Column Footing

Dextra Bartec Headed Bars, which use the same type of threads as the couplers, were also installed at the footing of the mega columns to address reinforcement congestion.

The anchors, compact and easy to install, can be set on bars during the final stage of reinforcement installation. In this project, the anchors were installed from the top of the raft onto the vertical bars. More than 100,000 Headed Bars were used in this type of application, appearing as X-shaped reinforcement at the column footing.

Column-to-Beam Connections

For more standard applications, Bartec couplers were also used to create horizontal connections between the columns and beams.

Bar-Boljare highway – Four viaducts

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Bar-Boljare highway – Four viaducts

The Bar-Boljare Highway Project is a key infrastructure project led by the Ministry of Transportation and Maritime Affairs of Montenegro. It aims at improving the connections within the country and also between Montenegro and the rest of Europe to boost the country’s economy and tourism.

The project, built by China Road and Bridge Corporation (CRBC), embodies a new successful example of the cooperation between China and Eastern Europe. The new 2×2-way highway spans over 40 km. It is built in challenging terrains and yet satisfies both EU & Montenegro standards of road infrastructure. Its schedule is ambitious too: both roads and viaducts should be built in under 4 years. For the Bar-Boljare Highway Project, Dextra supplied its Bartec rebar coupler solution, used for the splicing of rebar in the piles of the four viaducts. Dextra Bartec splicing solution was chosen on that project for its compliance with ISO 15835 S2, which defines rebar couplers and reinforcements to be resistant to violent earthquake conditions. A total of 230,000 Bartec rebar couplers have been supplied to CRBC.