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Category: Projects

Bangkok BTS

Posted on by Sir Gwi

Bangkok BTS

The Bangkok mass Transit System (BTS) is a large urban skytrain system located across Bangkok, the capital city of Thailand. The system was inaugurated in 1999.

As of 2017, the system consists of 24 elevated stations and 37 km of elevated rail organized in two main lines crossing each other in Siam central station.

The BTS system is undergoing an extension of its two main lines with line segments and stations expected to enter in operations in 2019 and 2020.

Foundations

For various packages over the years, Dextra has supplied Sonitec tubes, which are used to test the concrete pile foundations below stations and rail.

In total, Dextra supplied approximately 40,000 linear meters of Sonitec tubes, a distance actually equivalent ot the BTS system length itself.

Pylons

For pylon vertical bar connections, Dextra offered its
Bartec connection.
Bartec allows to conveniently splice prefabricated rebar cages by the use of a simple rebar coupler, allowing savings in steel compared to overlap and accelerating site operations.

In Thailand the threading operation is supported from Dextra’s factory, conveniently located in the North East of Bankgok. Contractors receive the rebar already prepared and mounted with their rebar coupler.

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Cylingas Reservoirs

Posted on by Sir Gwi

Cylingas Reservoirs

Cylingas gas tanks are part of the industrial complex of Cylingas located at Al Quoz, United Arab Emirates.

For the installation of new gas tanks, Dextra has supplied its tension bar systems. Tension Bars were used for the cross-bracing of the tank footing structure. Carbon steel rods in Grade 355 and in diameter 120mm (thread M123) were chosen for this application, delivered with forks, lock covers and turnbuckles. A total of 48 sets were installed in total for this project.

The assemblies were fixed onto the pilons by the use of gusset plates connected to the forks. Turnbuckles were used for the splicing in the lower part of the assembly, to ease installation. Turnbuckles allow some length adjustment and stressing of the assembly by bringing closer 2 segments of bars.

For more information on Tension Bars in industrial settings, please download our dedicated introduction brochure:


Download (.pdf)

For more information about the availability of high performance bar systems in Middle East, please contact our Dubai office.
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Pune Cricket Stadium

Posted on by Sir Gwi

Pune Cricket Stadium

The Pune Cricket Stadium is a cricket arena located near the city of Pune in the state of Maharashtra, India.

The stadium was designed by British firm Hopkins Architects and built in 2010-2011.

The stadium can host as many as 37,400 people and offers spectacular view over the surrounding mountains.

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 steel pylons and suspend the roof structure.

The Tension Bar sets were supplied in steel grade 460. Each tendon is composed of several bar segments spliced together by the use of couplers (no length adjustment) or turnbuckles (length adjustment and tensioning possible).

In total, over 50 tons of Tension Bars which are anchoring the roof structure of the Pune Cricket Stadium.

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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.

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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.

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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

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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.

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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.

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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.

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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.

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