Chennai International Airport

Posted on November 4, 2022March 15, 2024 by Sir Gwi

Chennai International Airport

Chennai International Airportis the main airport serving the southern city of Chennai in India. The airport, located south of the city, is the fourth busiest airport in India.

Dextra has been involved in the construction surrounding the airport renovation efforts, which took place between 2008 and 2012.

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

The main contractor on this project was Herve Pomerleau International (HPI) – Consolidated Construction Consortium Limited.Contractor chose the Bartec solution to splice reinforcement in all columns and piers (vertical connections) as well as for the beams and foundation mats.

Thanks to its parallel thread technology and rebar prepared with various thread length, Bartec offers a very high level of performance while requiring only one coupler for standard applications (when one bar can be rotated inside coupler) and positional applications (when no bar can be rotated).

Dhaka MRT Line 6

Posted on November 4, 2022March 14, 2024 by Sir Gwi

Dhaka MRT Line 6

Dhaka Metro Rail is a mass rapid transit system under construction in Dhaka, the capital and the busiest city of Bangladesh.

MRT Line 6 consists of 16 elevated stations that are each 180 meters long and 20.1 kilometers of electricity-powered light rail tracks. Except for the depot and some of the LRT (Light Rapid Transit) that would run beside it, Line 6 will be elevated over current roadways, largely above road medians, to let traffic to flow beneath it, with stations likewise elevated.

Dextra supplied various solutions to the project.

50,000 linear meters of Sonitec, an easy-to-assemble and time-saving tube solution used for the CSL (crosshole sonic logging) testing of foundation piles.

1,000 sets of Shear Key system, a post tensioning bar system that acts as a permanent seismic restrainer for the connection of elevated metro precast segments.

More than 50,000 pieces of Bartec coupler were also applied for the reinforcement of the station structures.

Construction of Line 6 is anticipated to be completed in 2022.

Brisbane Airport Link

Posted on November 4, 2022March 15, 2024 by Sir Gwi

Brisbane Airport Link

Brisbane Airport link is a motorway from Brisbane business district to the North East of the city in direction of the Airport. The Brisbane Airport links features

The construction of the line has been done by segments. Parts of the line are already operating. Full completion is planned by 2024.

Dextra has been involved since between 2009 and 2011 in the design, engineering and supply of large FRP Soft Eyes for TBM entry/exit points.

Prior to D-Wall construction, Dextra engineers the FRP cage design taking into account size of the TBM, margin for error, soil forces and more design parameters.

Thanks to the properties of FRP material, Tunnel Boring Machines cut through the D-Wall in a minimum time, saving time on schedule and ensuring the perfect condition of the TBM’s head.

On this project, Dextra also supplied Griptec Couplers, used as vertical connections in the D-Walls, barrette piles and tunnel superstructures. More than 80,000 Griptec couplers have been supplied for the tunnels of the Brisbane Airport Link.

Al Haffar Abu Dhabi Police Training Facility

Posted on November 4, 2022March 16, 2024 by Sir Gwi

Al Haffar Abu Dhabi Police Training Facility

The Al Haffar Abu Dhabi Training Facility is a project by the Abu Dhabi Ministry of Interior. Dextra has been involved on the construction of the tribune facing a police shooting training area. The project is lead by contractor Express Facility Management.

For the construction of the seating area, Dextra supplied its Groutec precast connection solution to local precaster Techno Cast Precast to anchor the footing of large precast “L-shaped” cantilever elements, which ultimately will span over the tribunes.

At the bottom of each pile, 18 Groutec sleeves were installed, fitting on Ø32mm rebar (Bartec threaded rebar is widely available in the UAE through Dextra network of distributors).

For more information about Dextra precast solutions available in the United Arab Emirates, please contact our Dubai office.

HCMC Metro Line 1: Ba Son Shipyard Station

Posted on November 4, 2022March 14, 2024 by Sir Gwi

HCMC Metro Line 1: Ba Son Shipyard Station

Ho Chi Minh City Metro is Vietnam’s first rapid transport system, serving the country’s business and financial capital.

There will be eight lines in the metro system. The first, second, and fifth lines are in the implementation stage, while the remaining lines are in the investment planning stage.

The project’s Line 1 is 19.7 kilometers long, with a 2.5-kilometer underground segment and a 17.2-kilometer elevated section. Line 1 will run from Ben Thanh Market in the central area to Suoi Tien amusement park in District 9. There are three underground stations throughout the underground section. Line 1 also includes a Saigon River crossing.

The Line 1 Package 1b comprises of construction of the underground section from Opera House station to Ba Son station, including two underground stations and a 1,315-meter subway tunnel.

Shimizu-Maeda Joint Operation selected Dextra’s concrete reinforcement solutions to minimize steel congestion in heavily reinforced areas. 230,000 headed bars were delivered and installed for shear link reinforcement.

Mae Fah Luang Chiang Rai Airport Renovation & Expansion

Posted on November 4, 2022March 15, 2024 by Sir Gwi

Mae Fah Luang Chiang Rai Airport Renovation & Expansion

Mae Fah Luang Chiang Rai Airport, located in Chiang Rai, Thailand, is a vital transportation hub for the region. The airport serves as a gateway to the popular tourist destinations of Chiang Mai, Chiang Rai, and the Golden Triangle. In recent years, the airport has undergone a major renovation and expansion project to modernize its facilities and increase its capacity. As part of this project, Dextra supplied over 180 tons of dowel bars to be used as construction joints for the airport runway pavement.

The construction of a runway pavement requires a significant amount of planning and preparation. One of the essential components of a runway pavement is the construction joint, which connects the individual concrete slabs together. Construction joints are necessary to ensure that the pavement can withstand the heavy loads of aircraft and the extreme weather conditions. Without proper construction joints, the pavement can experience cracking, spalling, and other types of damage.

Dowel bars are a critical component of construction joints, as they provide load transfer between the individual concrete slabs. Dowel bars are typically made of steel and are placed in the pavement perpendicular to the construction joint. They allow for movement between the concrete slabs while providing support and load transfer.

For the Mae Fah Luang Chiang Rai Airport project, Dextra supplied over 35,000 dowel bars, totaling more than 180 tons of steel. The dowel bars were manufactured at Dextra’s facility in Thailand and were delivered to the construction site in stages to meet the project’s timeline.

The project has not only increased the airport’s capacity but also provided a safer and more reliable transportation hub for the region.

Visakh Refinery Modernisation

Posted on November 4, 2022March 14, 2024 by Sir Gwi

Visakh Refinery Modernisation

Visakh Refinery Modernisation Project is a brownfield expansion of the Visakh refinery located in Visakhapatnam, India.

The project will expand the refining capacity from 8.3MMTPA (millions of metric tonnes per annum) to 15MMTPA, while enabling the production and distribution of the fuels that comply with Bharat Stage-VI, a new emission standard instituted by the Government of India.

Dextra was involved in the expansion by supplying Unitec bolted couplers for precast beam connections.

Unitec is a bolted splicing system designed for the connection of two rebars with no thread: its screws will lock both bar ends and complete the connection.

The Visakh Refinery Modernisation project is scheduled for completion in 2020.

Sellafield decommissioning

Posted on November 4, 2022March 14, 2024 by Sir Gwi

Sellafield decommissioning

Sellafield is a now decommissioned nuclear plant site specialized in the fuel reprocessing and decommissioning of others UK and international reactors. It is located in Cumbria, in the North West of England.

Dextra has been involved in supplying rebar connection solution for the construction of new buildings in 2008 through its local rebar fabricator partner in the UK.

Griptec was the preferred rebar splicing solution as it’s if certified TA1-A, TA1-B and TA1-C (“Sellafield” certification level), the three main levels of rebar splice certifications by CARES.

Griptec features an unmatched 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 the project requirement.

More than 80,000 Griptec connections have been used on the project, mostly for wall applications.

La Hague nuclear waste reprocessing plant – the interim storage

Posted on November 4, 2022March 18, 2024 by Sir Gwi

La Hague nuclear waste reprocessing plant – the interim storage

La Hague site is a nuclear fuel reprocessing facilities located in La Hague, northern France. The plant has been treating spent nuclear waste from several countries since 1960s. Nowadays, Being operated by AREVA NC, it now operates nearly half of the world’s spent nuclear fuel recycling and reprocessing capacity, including waste from France itself, as well as from Japan, Germany, Belgium, Switzerland, Italy, Australia, Spain and the Netherlands.
The reprocessing plant also separates waste of different radioactive activity and life span, and applies specific storage solutions to each type of waste. Therefore, in order to reassure the reinforcement of the plant’s two recent nuclear waste storage, the main contractor VINCI – Travaux Public Cherbourg opted for Dextra’s 100%-proofed splicing system Griptec, delivered through its local fabricators in France.

Griptec, full performance rebar couplers for nuclear projects worldwide

For the construction of nuclear projects, full-performance reinforcement solutions are required. This is the reason why Dextra Griptec was preferred for this project, as it is also certified AFCEN, the international standard for nuclear plants. More than 5,000 tons of Dextra products were delivered on-site for the construction of two storage buildings, both intended to store Uranium and Plutonium.
Griptec couplers are used to reinforce the storages’ walls, as it is a full-performance (tension, compression, cyclic and fatigue) rebar splicing system. The solution provides no place for error, as each and every connection is systematically proof-tested by pull test during extrusion cycle as part of its standard cycle, and can perform above the project requirement. Moreover, for our customers in nuclear industry, Dextra provides more than only reinforcement solutions: we also accompany designers, consultants and contractors through each step of their construction project.

For more information about our solutions available in France and Europe, please contact our Paris office.

Río Subterráneo a Lomas Tunnel

Posted on November 3, 2022March 14, 2024 by Sir Gwi

Río Subterráneo a Lomas Tunnel

Río Subterráneo a Lomas tunnel is a 13.5-kilometer-long tunnel in Buenos Aires, Argentina, which will transport drinking water from the newly expanded General Belgrano Water Treatment Plant in Bernal’s Quilmes area to the city of Lomas de Zamora.

Being the main element of the Agua Sur system, a water supply project in Argentina, the tunnel is the country’s largest water infrastructure project in the last 40 years. This new system will provide 2.5 million inhabitants in the Buenos Aires metropolitan area’s southern region access to freshwater.

For this significant project, Dextra supplied soft eyes reinforced with GFRP (Glass Fiber Reinforced Polymer) bars to facilitate the penetration of Tunnel Boring Machines (TBM) through a reinforcement cage.

The project required two boring machines to be launched and received from shafts. The tunnel was excavated at an average depth of 25 meters, starting with a curve with a radius of about 400 meters, and moving along a largely straight alignment, with a maximum slope of +/- 2 percent.

The first launch shaft is composed by 4 circular sectors that interconnected with each other in the bottom area. The total length of the shaft is around 45 meters long, 12 meters wide, and 25 meters high.

The whole project is anticipated to take approximately 10 years to complete.

Category: Projects