Mumbai Trans Harbour Link

Posted on November 5, 2022March 20, 2024 by Sir Gwi

Mumbai Trans Harbour Link

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

The road is also known as the Sewri-Nhava Sheva Trans Harbour Link that will start in Sewri, South Mumbai, crossing the Thane Creek area through a 16.5-km bridge and will terminate at Chirle village, near Nhava Sheva.

This colossal project will contain a 6-lane highway, which will be 27 meters in width, in addition to two emergency exit lanes: with an estimate of 70,000 vehicles per day, it will drastically help to alleviate the infamous traffic congestions of the Greater Mumbai area.

More than 35 years have passed since this solution was originally envisioned, and the actual construction began only in 2018.

Once completed, it will be the longest sea bridge in India.

Dextra was involved in this project by supplying more than 30,000 Sonitec sonic tubes for the determination of the structural integrity and homogeneity of concrete within barrette piles using the CSL (Cross Sonic Logging) testing method.

With a conveniently enlarged bell-mouth that allows the seamless connection of two tubes, the Sonitec system is extremely easy to install in reinforcement cages.

Beijing CCTV Tower

Posted on November 5, 2022March 14, 2024 by Sir Gwi

Beijing CCTV Tower

CCTV Headquarter building is a landmark tower located in Central Beijing Business district. The tower is hosting the operations of China Central Television and has been since its completion in 2012 one of the architectural landmarks of the Chinese capital.

For that project, Dextra was involved in providing contractor China State Construction Engineering Corporation with an anchoring solution for the columns that will ultimately support the building “bridge” complex architecture.

The anchoring of the structure is a challenge on the CCTC building given the building’s height (234 meter) and its distinctive complex shape. Furthermore, the building is actually located in an area of seismic activity, and must therefore been built with to resist additional loads.

Dextra supplied high tensile PT bar Systems in large diameters. The Post-Tensioned system aim tolock themetallic structure located at the foot of the megacolumns, and anchor them into a heavily reinforced mat.

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

Valenciennes Bowstring

Posted on November 5, 2022March 14, 2024 by Sir Gwi

Valenciennes Bowstring

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

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

The tension rod system is not only trusted for its high performance, but it also comes with different parameters such as design load, surface finish, and corrosion resistance, to fit all project technical and aesthetic requirements.

Jumeirah Beach Residence

Posted on November 5, 2022March 14, 2024 by Sir Gwi

Jumeirah Beach Residence

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

The residential area comprises more 40 towers, many of them reaching the 40 floors mark. In total, the Jumeirah Beach Residence can host more than 15,000 people.

Dextra Middle-East, also located in Dubai, has been involved between 2003 and 2005 on numerous tower packages.

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 couplers, more than 70,000 meters of Sonitec tubes were also supplied to the piling contractor to offer a practical and safe way to assemble sonic tubes, boosting productivity.

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 superstructure itself, Dextra couplers were used as horizontal connection points between the corewall and the beams.

For that application, couplers are cast in the corewall flush with the formwork. A thread protection cap supplied by Dextra protects the concrete from leaking in the
Bartec coupler.

At a later stage, continuation rebar, previously prepared with
Bartec threads, are connected into the pending couplers to create starter bars.

Pelješac Bridge

Posted on November 5, 2022March 14, 2024 by Sir Gwi

Pelješac Bridge

The Pelješac Bridge construction aimed to connect the mainland to the Pelješac Peninsula, replacing 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.

The 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 to securely connecting the pile reinforcement cages and ensuring the long-term stability and safety of such a critical piece of infrastructure.

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

Posted on November 5, 2022March 14, 2024 by Sir Gwi

Cebu-Cordova Link Expressway (CCLEX), 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 will also intended to support Cordova’s economic growth, as the expressway will position the City as the gateway for island tourism.
Also known as Third Mandaue – Mactan Bridge, the official ground-breaking 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 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 Guadalupe River to the 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 Cebu-Cordova Bridge

The design and the construction of this megaproject is 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, as well as Transition splices of steel grade 75, both in diameter 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 Philippines, please contact our Bangkok office.

Photo credit: https://cclex.com.ph/updates/

West Gate Tunnel

Posted on November 5, 2022March 16, 2024 by Sir Gwi

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

Posted on November 5, 2022March 14, 2024 by Sir Gwi

Mecca Mataf Expansion

Mataf is the surrounding around the Kaba, center of the holiest mosque in Islam, located at the Grand Mosque of Mecca. It is at the place where the tawaf, the anti-clockwise circumambulation around the Kaba, takes place.

The Mataf expansion, is a large project planning to add 1,300,000 sqm to the existing 400,000 sqm of existing space. The renovation will feature a new basement and 3 additional floors, adding capacity for hundreds of thousands of additional worshippers.

For this very special project,Dextra Middle-East, has been involved in the supply of rebar couplers and anchor solutions.

Megacolumn

For the megacolummns, Dextra offered to contractors an opportunity to connect cages vertically, while coping for possible misalignment.This was done using Bartec Caging assemblies, which can perform a misalignment adjustment equivalent to one bar diameter.

While allowing reconnection, the Bartec Caging Assemblies were also used to temporarily lock the large column template (visible in red in photos) and guarantee the correct set up of column reinforcement.

Megacolumn footing

Dextra Bartec Headed Bars, which use the same type of threads as the couplers, were also installed at the footing of megacolumn as a way to cope with reinforcement congestion.

The anchors, compact and easy to set up, can be set on bars at the final stage of reinforcement installation. In that case, the anchors were installed from the top of the raft on the vertical bars.More than 100,000 Headed Bars were used on this type of applications during the project, those are visible as the X shape at the column footing.

Column-to-beam connections

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

Bar-Boljare highway – Four viaducts

Posted on November 5, 2022March 16, 2024 by Sir Gwi

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 in order 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-ways 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 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 coupler and reinforcement to be resistant to violent earthquakes conditions. A total of 230,000 Bartec rebar couplers have been supplied to CRBC.

The Broadway London

Posted on November 5, 2022March 14, 2024 by Sir Gwi

The Broadway London

The Broadway London project consists of six buildings, ranging between 13 and 19 stories tall. The mixed-use development is located between Westminster and Victoria, directly adjacent St James Park Station on a 1.7-acre triangular site.

The development contains 268 luxury apartments. Its ground floor will house 25,000 sq. ft. of high-end retail units, while 1st to 3rd will provide 116,000 sq. ft. of prime commercial space. It also has a colonnade between the east and west buildings, with feature landscaped residents’ gardens on the roof terraces.

The buildings have been named after three of the world’s most revered diamonds – The Sancy, The Paragon and The Cullinan – six new jewels in Westminster’s crown.

Dextra supplied over 20,000 units of Groutec S coupler, installed in 1,200 square and circular precast columns.

Groutec is a mechanical splicing system designed for the connection of precast elements in compliance with Eurocode 2, BS 8110, ACI 318, IBC, AASHTO. It is available in 3 models: slim “S”, large tolerance “L” and fully grouted “F”.

The project is due for completion in December 2021.

Category: Projects