Étiquette : #DextraGroupe

Cebu-Cordova Link Expressway (CCLEX) is one of the biggest infrastructure projects being undertaken in the Philippines. The project features a combination of a causeway, an 8.5km long cable-stayed toll 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.

For the reinforcement of the colossal expressway foundations, the contractor CLJV has chosen Dextra’s well-known rebar splicing solution Bartec.

Standard, Bridging, as well as Transition splices in diameters 40 and 50mm have been used with grade 75 bars in the foundations’ piling cages.

Moreover, CLJV opted for Dextra Bartec headed bars to provide better end anchorages in congested areas, a convenient alternative to hooked bars, traditionally used for anchoring.

Also called the Third Bridge Over the Panama Canal, the 2.8-kilometer Atlantic Bridge is one of the world’s longest cable-stayed concrete bridge.

Crossing one of the world’s most crucial shipping routes, the Atlantic Bridge is located near the city of Colón. It is designed not only to let vehicles cross the canal even when the locks are in operation, but also to allow the passage of large container ships, Post-Panamax, with its 75-meter vertical clearance above sea level.

For this iconic project, more than 350,000 Dextra standard Bartec couplers were used for the bridge’s reinforced pile cages, pile caps and pylons by the contractor VINCI Grand Projets. The full-performance Bartec couplers substitute the overlap on rebars of up to #14 (equivalent 43 mm) on grade 80 steel.

Dextra also provided 3 sets of Bartec equipment for on-site bar-end preparation. Machine setup, operator training and maintenance services were done by our local After Sales Service team to guarantee maximum productivity. Moreover, to avoid steel congestion in the bridge’s pile caps, more than 50,000 Headed Bars end anchors were also used.

The Atlantic Bridge is planned to open in early 2019.

Australia’s 8.5-kilometer Forrestfield-Airport Link is a rail service under construction in Perth, Western Australia. It will open in 2020 and allow both locals and tourists to easily commute from the airport to the city and the eastern suburbs.

Aspiring to become a regional hub, Kuwait airport increases its capacity

The Kuwait Airport Expansion project aims to meet the country’s rapid and significant economic growth and satisfy the steadily-rising passenger and cargo flow.

The new Terminal II is designed not only to provide highest comfort to passengers, but also to reflect Kuwait’s rich culture and civilization. When completed, the building will have the form of a symmetrical triangular mark. Passenger capacity of the airport will increase to 25 million in the first phase of the expansion, which would be more than double of what it is currently handling.

Kuwait’s Ministry of Public Works has elaborated very stringent specifications for this landmark project, which requires UK CARES and US ASME certifications from the manufacturer. Rolltec® couplers were therefore a natural choice for the contractor Limak Insaat, as they meet all the client’s requirements in terms of performance and quality, and the client could count on a strong local presence and support from Dextra.

Standard Rolltec® couplers are extensively used for the raft, walls and columns connections of the entire terminal. Furthermore, weldable couplers were delivered for the connection of the ninety precast mega-columns with the steel roof structure.

To support the supply of over 1 million connections, Dextra has deployed fifteen Rolltec® threading machines to site. The project completion date is set in 2020.

Mexico City’s new International Airport was designed by Sir Norman Foster and launched in 2014. It is located to the East of Mexico’s capital and aims to provide the city with a new state-of-the-art air transportation hub. The project consists of an X-shaped terminal with a targeted annual capacity of 68 million passengers, 3 runways, and the control tower.

For this the largest infrastructure project in Latin America, Dextra is supplying Coupleurs de barres d'armature Bartec. These are used in the foundations of the terminal building (contractor ICA), the transport building (contractor Sacyr) and the control tower (contractor Aldesa).

Bartec couplers, often preferred in seismic areas such as Mexico, substitute the overlap on all size ASTM #12 (equivalent 38 mm) rebar. On such large diameters, it is both faster and cheaper to connect bars with couplers rather than traditional overlap splicing.

Dextra is currently providing Mexico Airport with 10 sets of Bartec equipment (a total of 30 machines, with each set delivered in a container). This setup is being supported by our local after-sales team which is training the machine operators and maintaining the equipment to achieve maximum productivity.

Forest City is a massive mixed-use urban development located close to Johor Bahru in Southern Malaysia. The development is built on reclaimed land on the shores of the Johor Strait.

Dextra has been involved since the early phases of the project as suppliers of the Groutec S precast connection solution.

Groutec S is the recently introduced slim version of the well-known Groutec L coupler. Its compact design allows it to fit into thin precast elements.

The sleeves simplify the connection of precast elements (e.g. columns or panels) to the structure of the 38-storey towers, thus speeding up the construction cycle.

Both Groutec models consume significantly less grout than other grouting sleeves on the market and do not require proprietary grout.

Landmark 81 is a high-rise tower project located on the bank of the Saigon river in Ho Chi Minh City’s Bing Thang. The project is owned and developed by Vietnamese Vincom Group.

The tower, whose construction started end of 2014, is expected to reach a height of 461 meters, thus becoming the highest building in Vietnam and 11th tallest tower building in the world.

For Landmark 81, Dextra is supplying its Bartec® coupler system to contractor Coteccons. Bartec® system has been approved by MACE International, owner’s representative, and ARUP, structural consultant on the project.

In total, 250,000 Bartec® couplers are being used for vertical rebar connection in the core wall and columns as well as for horizontal applications such as core wall-to-beam and core wall-to-slab connections.

The use of Bartec® rebar couplers allows the climbing formwork to move up without disturbance from protruding bars as well as connect the starter bars of the slabs in a very productive manner. These techniques, combined with state-of-the-art concrete monitoring, allow very fast construction cycles as short as 35 hours per floor.

For the connection of steel columns to concrete beams, Dextra supplied 20,000 weldable couplers.

The construction is supported on site by three sets of Dextra Bartec® equipment which are being maintained by Dextra and operated by Dextra’s distributor in Vietnam, Lotus Greentech.

The construction has now passed level 35 (of 81) and will be completed in 2018.

On the right bank of the Chao Phraya river, the Icon Siam complex, consisting of two towers and a shopping mall, is currently reaching for new heights.

Les deux tours devraient atteindre respectivement 280 m (SuperLux Tower) et 315 m (Magnolia Tower). La tour Magnolia sera ainsi légèrement plus haute que la tour MahaNakhon, le plus haut bâtiment de Bangkok depuis 2015.

Dextra is supplying Thai-Obayashi (contractor of the shopping mall structure) and Italian-Thai (contractor of both towers) with its Bartec rebar splicing solution.

Les ingénieurs de Dextra ont dispensé des formations aux opérateurs et effectué une maintenance préventive directement sur site pour garantir un rendement maximal dans la production de filetage.

In total, more than 800,000 Bartec rebar couplers and 20,000 Bartec Headed Bars are being used in foundations and superstructure in the following applications:

L-shaped dowel bars (wall-slab connections)

This is a typical application used in foundation D-Walls to avoid protruding rebar. it is also used in the superstructure to allow the sliding formwork to climb up without any disturbance

Remplacement des barres à crochets par des ancrages d'extrémité

Lorsque l'armature du mur est particulièrement encombrée, l'utilisation de barres à tête (également appelées ancrages d'extrémité) permet d'ancrer l'armature dans le mur sans avoir besoin de réaliser des crochets.

Assemblage à double extrémité dans les murs de refend

Cette solution permet de créer une continuité à l'intérieur de la colonne ou du mur en reliant deux dalles ou poutres horizontales.

Coupleurs soudés pour structures composites

Parfois, il est nécessaire de commencer le renforcement à partir de la structure en acier. Dans ce cas, les coupleurs soudables sont la solution idéale : fabriqués en acier à faible teneur en carbone, ils peuvent être soudés facilement et permettent la connexion à une barre d'armature filetée.

On the French island of La Réunion (located 700 km East off the coast of Madagascar), a joint venture composed of contractors VINCI Construction Grands Projets, Bouygues Travaux Publics, Dodin Campenon Bernard and Demathieu Bard, is currently building a new offshore elevated 2×2-lanes viaduct of 13 kilometers, which aims to replace the older unsafe road structure, located along the coast and frequently damaged by rockfall.

For this large project, VINCI is operating a large custom-made platform named “Zourite” to position, lift and sink heavy precast bridge piles – an engineering challenge considering the individual weight of the elements: up to 4,800 tons for the base of piles!

The JV members and Dextra worked together to design a lifting system based on M64 smooth bar systems in high performance grade 930/1080, with each system withstanding loads up to 200 tons.

each anchored to concrete thanks to 8 Dextra bar systems.

A total of 32 bar systems are anchored directly into the concrete base of each pile and post-tensioned using a hydraulic rotary jack before lifting.

Once the base reaches its final location, the top part of the anchorage is dismantled by divers so it can be reused for the installation of other piles.

The first piles have been installed at the end of August. A total a 48 piles will support the Route du Littoral viaduct, all lifted thanks to more than 1,500+ Dextra bars.