Dextra Group | Reliable Connections

DEXTRA
Linkedin Facebook Youtube
Search
Close this search box.
Menu
My Dextra
DEXTRA
Linkedin Facebook Youtube
Search
Close this search box.
Menu
My Dextra

Category: Projects

Xayaburi Dam

Posted on by Sir Gwi

Xayaburi Dam

Xayaburi dam is a hydroelectric dam located in Northern Laos. The project, planned to start operating in 2019/2020, is the first of 11 dams plans in the lower Mekong region. The dam is planned to deliver 1,285 MW of electrical capacity.

Xayaburi dam is a hydroelectric dam located in Northern Laos. The project, planned to start operating in 2019/2020, is the first of 11 dams plans in the lower Mekong region. The dam is planned to deliver 1,285 MW of electrical capacity.

For this remote construction sites, a Bartec rebar preparation equipment set was delivered to site in its container. A total of 120,000 rebar couplers were used on the project over a two-years period.

Précédent
Suivant

Mumbai ChhatrapatiShivaji Airport

Posted on by Sir Gwi

Mumbai ChhatrapatiShivaji Airport

Mumbai ChhatrapatiShivaji International Airport is the primary airport serving international airports to Mumbai. It is the second airport in India in term of passenger traffic.

Dextra has been involved in the construction of Terminal 2 and associated structures, which took place between 2009 and 2013.

For Mumbai Airport, Dextradelivered its popular
Bartec rebar coupler solution, which is the main rebar coupler solution used on large projects in India.

Dextra operates in Mumbai its own threading yard and took in charge therebar preparation for this project.

On the construction site,
Bartec was used extensively for vertical connections (bar-to-bar vertical column connections), as well as horizontal applications (column-to-beam), typically on reinforcement ⌀32mm. Bartec offers a very high level of performance, guaranteeing “bar break” performance on the rebar used on Mumbai Airport.

For the contractor(Larsten& Toubro on this project),
Bartec offers a simple and cost effective way of connecting rebar.

Thanks to its parallel thread technology and rebar prepared with various thread length, it requires the very same coupler for standard applications (when one bar can be rotated inside coupler) and positional applications (when no bar can be rotated). A neat feature simplifying stock keeping and preventing product mismatch at site.

Précédent
Suivant

Madrid Chamartín Clara Campoamor Railway Station Expansion

Posted on by Sir Gwi

Madrid Chamartín Clara Campoamor Railway Station Expansion

Madrid Chamartín Clara Campoamor Railway Station Expansion is one of the largest infrastructure projects in Spain. The expansion project aimed to increase the capacity of the railway station and improve the overall passenger experience. Dextra supplied 60,000 linear meters of Sonitec, a crosshole sonic logging testing tube, for the piling work of the project.

The Madrid Chamartín Clara Campoamor Railway Station is one of the busiest railway stations in Spain, serving more than 60 million passengers each year. The expansion project was necessary to meet the growing demand for train services in the city. The project involved the construction of new platforms, tracks, and passenger facilities.

Dextra, a leading supplier of construction solutions, was chosen to supply the Sonitec crosshole sonic logging testing tube for the piling work of the project. The Sonitec tube is a highly advanced system that enables precise and accurate measurements of pile integrity. The system uses crosshole sonic logging technology to assess the condition of the piles, ensuring that they are strong enough to support the weight of the railway station.

The use of the Sonitec crosshole sonic logging testing tube allowed the construction team to carry out the piling work with confidence and ensured the structural integrity of the piles. The system provided real-time data on the pile condition, enabling the construction team to make informed decisions and make any necessary adjustments during the construction process.

Banner image credit: UNStudio, b720 Arquitectura and Esteyco

Précédent
Suivant

Jamnagar refinery expansion

Posted on by Sir Gwi

Jamnagar refinery expansion

Located in the Gujarat, in western India, the Jamnagar refinery is the largest in the world in production capacity. Owned by Reliance Industries, it has been commissioned in 1998 and spreads over the 50 km2 surface area.

For the phase 3 alone, more than 305,000 tons of steel reinforcement were used: a 36 months project involving more than 100,000 engineers and construction workers.

Dextra has been involved in Jamnagar since the early days and supplied its rebar splicing solutions on the phases 1, 2 and 3 of the project.

For the phase 3 especially, 3 rebar coupler solutions were used:

Bartec solution was used for cast in situ applications, for bar-to-bar connections in foundations, pile cages, column cages. Bartec couplers were also used as a way to splice bars in heavily congested rafts and pile caps.

For the pipe-racks, which were built from precast elements, from a precast factory part of the project. Groutec couplers have been used to connect beams and columns. Positionned in the bottom elements and filled with grouts, they conveniently avoided the need of in situ wet joint.

image06

 

For other applications where rebar length is too short to allow traditional overlap, Unitec couplers were used.

For more information on Jamnagar, please download our Case Study.

Précédent
Suivant

Olympic Velodrome

Posted on by Sir Gwi

Olympic Velodrome

The Olympic Velodrome, now renamed as Lee Valley VeloPark, is a multipurpose sport facility located in East London. The facility was initially built to host the 2012 London Olympics and Paralympics. The facility still features road course tracks and BMX tracks and hosts international cycling competitions.

For this project, Dextra Europe delivered the Griptec rebar splicing solution to contractors Sir Robert Mcalpine and Byrne construction.

The Griptec splices were mostly use to provide vertical rebar connections in the velodrome columns.

Our Griptec solution was supported by Dextra’s local distributor in London which hosts the Dextra Griptec equipment required for the extrusion of the Griptec sleeves onto the rebar.

Griptec is a CARES TA1-A, TA1-B and TA1-C approved solution, making it suitable for even the most advanced rebar splicing applications and stringent project requirements.

Précédent
Suivant

Jizan Flood Mitigation Channel

Posted on by Sir Gwi

Jizan Flood Mitigation Channel

Jizan Flood Mitigation Channel is an under-construction infrastructure project in Jizan Economic City, Saudi Arabia.

Being located on the coastline, the city faces the risk of floods due to the frequent torrential rainfalls.

The flood channel plays the important role of protecting these downstream areas from major flood damage.

The channel will be exposed to seawater and water environmental contaminants that can influence the corrosion of steel: for this reason, Dextra ASTEC glass fiber reinforced polymer (GFRP) rebar was the perfect solution for the project. Almost 2 million meters of the GFRP rebar were delivered.

ASTEC GFRP rebar is a corrosive-free non-metallic reinforcing bar that provides higher tensile strength than steel while being lighter in weight.

Upon its completion, the project will be the world’s largest construction using GFRP rebars as its concrete reinforcement.

Précédent
Suivant

Hong Kong International Airport Terminal 2

Posted on by Sir Gwi
 

Hong Kong International Airport Terminal 2

Hong Kong International Airport (HKIA) stands as a global aviation hub, ranking among the world’s busiest airports for both cargo and passenger traffic. As part of its commitment to excellence and efficiency, the recent Terminal 2 Expansion project aimed to enhance the airport’s capacity and infrastructure. In this ambitious endeavor, Dextra’s contribution played a pivotal role in ensuring the project’s success.

With the continuous growth in air travel and cargo shipments, HKIA recognized the need to expand and upgrade its facilities to accommodate increasing demand. Terminal 2, a vital component of the airport’s infrastructure, became the focus of an extensive expansion project. This redevelopment aimed not only to increase passenger capacity but also to enhance operational efficiency and provide a seamless experience for travelers.

Dextra, a leading provider of engineered construction products, played a crucial role in the success of the Terminal 2 Expansion project. The company supplied an impressive 200 tons of post-tensioning bars, specifically the size M78 and M88, Grade 1080. These post-tensioning bars were instrumental in several key aspects of the construction process.

Connection of Jacking Towers:

The expansion project involved intricate engineering, requiring the precise connection of jacking towers to ensure the structural integrity of the new terminal. Dextra’s post-tensioning bars provided the necessary reinforcement, allowing for a secure and reliable connection between the towers.

Heavy Lifting of Roof Structure:

Terminal 2’s redevelopment included the installation of a robust and aesthetically pleasing roof structure. The weight and complexity of the roof necessitated a sophisticated lifting mechanism. Dextra’s Grade 1080 post-tensioning bars facilitated the heavy lifting process, ensuring that the roof structure was securely and efficiently positioned.

As HKIA continues to uphold its status as a global aviation leader, the Terminal 2 Expansion project and Dextra’s significant contribution stand out as a remarkable example of innovation and excellence in airport infrastructure development.

Précédent
Suivant

Melbourne Metro

Posted on by Sir Gwi

Melbourne Metro: five new underground stations

The Melbourne city’s metropolitan rail service operates 226 six-carriage trains across 998 km of tracks. The Metro has 15 lines and 222 stations, serving more than 400,000 passengers a day across the city.

In 2017, the construction of a 9 km long tunnel and five new underground stations were announced for greater capacity and additional coverage of the suburban area of the city.

The construction started in 2018. Dextra was involved in the project by supplying rebar connectors with fully automated rebar preparation equipment for the stations’ structure reinforcement works.

Griptec couplers were chosen thanks to the unrivaled performance in tension, compression and fatigue, and 400,000 units have been delivered.

Moreover, Dextra also supplied:

  • 5,300 GFRP Astec Combination Bolts. It is used at the CBD cavern location. The 19m width of the cavern allowed for the construction of two conventional 7m tunnels, built in parallel with the middle segments secured by GFRP CB Bolts, that can be cut to make the gallery wider.

  • 2,400 GFRP Geotec GR45 – 25mm dowels of 11.8 meters long were used to secure the face during the excavation.

  • 900 GFRP Astec soil nails ST50 – 41 were applied to secure several stations under construction. Some of them are outside of the boundary of the project since the GFRP can remain on the ground outside of their property and can easily be cut later.

  • 16 soft eyes were used in d-wall and bored pile of five stations.

Dextra was able to support and share their expertise on GFRP at design stage and produce the GFRP shaped solutions as per the owner expectation. Thanks to the cuttability of the GFRP, the TBM can pass through the d-wall in a limited time without any damages.

The Metro tunnel and its new stations are due to open in 2025 and predicted to be a new landmark of the city.

(photo credit: Hugh Llewelyn at https://bit.ly/2S0kbAG)

Précédent
Suivant

Khaosiung National Stadium

Posted on by Sir Gwi

Khaosiung National Stadium

The National Stadium of Khaosiung is a large open air stadium located in the Zuoying district of Kaohsiung, Taiwan. It was formerly known as the World Games Stadium or Takao Stadium. This is a multi-purpose stadium and currently the largest sport facility of Taiwan in term of capacity: 55,000 seats.

The arena was built in 2007 in anticipation of the 2009 World Games. Its main purpose now is to host football / soccer events, although its particular non circular shape also make it suitable venue to host baseball events.

For this project, Dextra supplied carbon steel Tension Bars used as cross-bracing incorporated into the secondary trusses of this complex steel structure, revealing the “nest-shaped” architecture of the stadium.

Précédent
Suivant

Jizan Refinery Terminal

Posted on by Sir Gwi

Jizan Refinery Terminal

Jizan Refinery & Terminal is an oil megaproject built for Saudi Aramco in the Jizan Economic Area, located on the Red Sea, West coast of Saudi Arabia.

For this project, Dextra engineered and manufactured marine tie rods systems used for the construction of quays of the marine terminal.

In total, Dextra delivered 412 tie rod sets in size M98. The grade 500 rods were connected to combi walls on both side thanks to Dextra designed captive nuts accessories, cast in the concrete piles.Captive Nuts allow a convenient angle of adjustment of 5° in all directions.

The assemblies, as long as 36 meters, were split into three main segments and reconnected thanks to couplers and hinge-couplers.

.


For more information about the availability of high performance bar solutions in Middle East, please contact our Dubai office

Précédent
Suivant

Please enter your information

Contact us

   Share your information with us and we’ll get back to you as soon as possible.