Dextra-Gruppe | Zuverlässige Verbindungen

New Bay Bridge von San Francisco

New Bay Bridge von San Francisco

The New Bay Bridge was a large civil engineering project undertaken between 2002 and 2013. The aim of the project was to replace two segments of the Bay Bridge that were vulnerable to earthquakes with a new structure designed to withstand seismic forces.

For this project, Dextra was involved in two segments of the renovation: the approach to the Bay Bridge on the San Francisco side and the eastern segment from Yerba Buena Island to Oakland.

Dextra supplied its Bartec® Headed Bar systems for this project. Headed Bars feature an anchor disc mounted on the end of a rebar previously prepared for the Bartec® system.

Die Verwendung von Endanker provides a smart and compact alternative to long rebar hooks in areas where reinforcement is particularly congested. Unlike hook bars, Headed Bars are easy to install, as end anchors can simply be screwed onto the reinforcement at a later stage, after the reinforcement is in place.

For the approach to the Bay Bridge in San Francisco and the eastern segment of Yerba Buena Island, Bartec® Headed Bars were used for shear reinforcement in the column foundations as well as in the bridge hinges.

The Bartec® Headed Bars solution is approved by Caltrans (the California Department of Transportation) for all imperial bar sizes #3 to #18 and is also certified by the ICC-ES.

Flamanville EPR

Flamanville EPR

Flamanville ist der erste Reaktor, der nach dem chinesischen Design 100% nach dem EPR-Design (European Pressurized Reactor) der neuen Generation gebaut wurde. Bei der Inbetriebnahme im Jahr 2019 wird es eine Kapazität von 1,3 GWe haben.

Dextra war seit Beginn der Bauarbeiten im Jahr 2008 und bis 2015 vor Ort.

Für dieses anspruchsvolle Projekt lieferte Dextra seine Griptec-Bewehrungsstäbe Schraubanschluss durch seine lokalen Fertigungspartner. Die Bewehrungsvorbereitung wurde durch eine zusätzliche Maschine vor Ort unterstützt.

Griptec ist der bevorzugte Bewehrungsstahl Schraubanschluss der Nuklearindustrie dank seines einzigartigen Leistungsniveaus und eines automatischen Testprozesses, der alle im Rahmen seines Standardzyklus hergestellten Verbindungen systematisch testet: eine Garantie dafür, dass 100% der Verbindungen die Projektanforderungen übertreffen.

Mehr als 800.000 Griptec-Verbindungen wurden bei dem Projekt verwendet, darunter 400.000 Positionsbaugruppen, wodurch der Anschluss von Bewehrungsstäben mit großem Durchmesser ohne Drehung möglich ist. Die Griptec-Verbindungen wurden am Reaktorgebäude installiert und APC Hülle, sowie Nebengebäude.

Griptec wurde insbesondere für die Verbindung großer vorgefertigter Platten verwendet.

Four sided panels with Griptec <span class=Muffen Und Überbrückungsstange” Breite=”303″ Höhe=”198″ />

Vierseitige Paneele mit Griptec Muffen Und Überbrückungsstange

Dank seiner Überbrückungsset, Quadratische Paneele könnte an vierseitigen Platten wieder verbunden werden, wobei eine mögliche Fehlausrichtung, die beim Anheben des Käfigs auftritt, berücksichtigt werden muss.

Hanoi Nhật Tân Brücke

Hanoi-Nhật-Tân-Brücke (Vietnam-Japan-Freundschaftsbrücke)

The Nhat Tan Bridge is an impressive cable-stayed bridge spanning the Red River, located north of Hanoi. The total length of the project is 8.9 km, including the 3.75 km main bridge.

The bridge serves as a new gateway to Hanoi, significantly reducing travel time to Noi Bai International Airport, the second busiest airport in Vietnam by passenger volume.

The bridge was inaugurated by the Ministry of Transport of Vietnam and opened to the public on January 4, 2015. It has since been renamed the “Vietnam – Japan Friendship Bridge.”

Dextra has been involved in the Nhat Tan Bridge since the early stages of the project, supplying the widely used Bartec® rebar couplers, the leading rebar splicing solution in Vietnam. Bartec® connections were used in various parts of the project, including approaches, foundation piles, pile caps, and bridge segments.

Bartec® couplers offer a versatile rebar splicing solution, as the same standard coupler can be used for both standard connections (where the rebar rotates into the coupler) and position connections (where only the coupler rotates, useful when rebar rotation is not possible). Dextra supplied more than 130,000 connections in total for this project, enabling the lifting of heavy elements.

For the temporary operations of lifting and securing the precast girder segments, Dextra also supplied 36 tons of high-tensile PT-Stangen.

Ciel Tower Dubai, Vereinigte Arabische Emirate

Ciel Tower Dubai, Vereinigte Arabische Emirate

Der Ciel Tower ist ein 82-stöckiges Hochhaus, das derzeit in der Dubai Marina entsteht. Mit einer Gesamthöhe von 365 Metern wird es nach seiner Fertigstellung im Jahr 2025 das höchste reine Hotelgebäude der Welt sein.

Der Turm liegt im Herzen der Dubai Marina, in der Nähe beliebter Attraktionen wie dem Marina Walk und der Marina Mall, einem großen Einkaufs- und Unterhaltungskomplex. Er wird 1.042 Luxussuiten sowie eine Dachterrasse mit Poolbar, Restaurant und Aussichtsplattform beherbergen.

Der architektonische Entwurf ist stark vom Konzept des vertikalen Wohnens inspiriert und maximiert den Panoramablick auf Palm Jumeirah, Bluewaters Island, den Hafen von Dubai und den Arabischen Golf.

Dextra hat 180.000 Bartec Kupplungen für kritische Strukturverbindungen, einschließlich Platten, Stützen zu Balken, Platten zu Kernwände, Kernwände, und Starterstangen, die die Festigkeit und Stabilität des Gebäudes erhöhen.

Der Ciel Tower soll zu einem Wahrzeichen mit Kultcharakter werden und Dubais Ruf als eines der weltweit führenden Reiseziele weiter festigen.

Quelle der Bilder: https://www.archdaily.com/931860/ciel-the-worlds-tallest-hotel-is-under-construction-in-dubai-marina, https://propsearch.ae/dubai/ciel- Turm

Orbit by Auro Realty, Hyderabad, India

Orbit by Auro Realty, Hyderabad, India

Indiens höchstes Geschäftsgebäude, gebaut mit Fertigteiltechnologie

Orbit is a 25-storey office building strategically located in the heart of Hyderabad’s IT Hub, constructed using precast technology. It is one of the tallest commercial buildings in India built with this method.

Constructed by Aurobindo Realty, the Orbit building was honored with the “Best Office Architecture India” award by the International Property Awards – Asia Pacific Property Awards 2018.

Designed with precast technology, the building is also proposed for LEED v4 Gold Certification from USGBC, demonstrating its commitment to environmental sustainability and energy efficiency.

Dextra's Groutec couplers played a key role in precast element connections. Approximately 60,000 couplers were installed in precast elements at the precast factory before being transported to the construction site for grout connections.

With the growing demand for modular buildings worldwide—especially during the COVID-19 pandemic, where healthcare and quarantine facilities were urgently needed—Groutec couplers have become a widely adopted solution. They are designed and manufactured in compliance with Eurocode 2, BS 8110, ACI 318, IBC, and AASHTO standards.

Bildquelle: https://www.aurobindorealty.com/portfolio/orbit/

Cartagena-Viadukt Del Manglar

Cartagena-Viadukt Del Manglar

The Viaducto del Manglar project is a 5.3 km bridge spanning the Ciénaga de la Virgen (swamp), north of Cartagena, Colombia. The project aims to reduce traffic congestion when exiting the city in the Zona Norte (Northern Area).

The viaduct, scheduled to open in 2018, is part of a longer highway project linking Cartagena with Barranquilla.

Für dieses Projekt in Kolumbien hat Dextra den Auftragnehmer Rizzani de Eccher beliefert Rolltec® Bewehrungskupplungen und Endanker. Rebar preparation operations have been carried out by Dextra’s distributor in Colombia.

Headed Bars were used in precast caissons, installed beneath the bridge girders, to reduce steel congestion in the heavily reinforced steel cages.

Für weitere Informationen zu Dextra-Lösungen in Kolumbien wenden Sie sich bitte an unser regionales Lateinamerika-Büro.

Copyright pictures: Consesion Costera

Two IFC (International Finance Centre), Hong Kong

Two IFC (International Finance Centre), Hong Kong

Two IFC is a landmark skyscraper in Hong Kong, located in West Kowloon. The 412-meter-high commercial building features 88 floors and is the second tallest building in Hong Kong, following the ICC Tower.

Vertical reinforcement is a crucial structural feature for buildings of this height. Consultant ARUP and contractors E-Man-Sanfield JV selected Dextra for the splicing of reinforcement throughout the building.

For this project, Dextra supplied more than 200,000 Bartec rebar couplers, which were primarily used for vertical connections, especially in all columns.

Additionally, rebar couplers provided connection points for second-phase rebar reconnection, typically between columns and slabs and columns and beams. To achieve this, rebar couplers were aligned horizontally and cast in concrete, allowing for reconnection at a later stage by screwing in the second-phase rebar.

Bartec is the preferred reinforcement splicing solution for contractors in Hong Kong, as it is recommended in the Hong Kong Building Material List. Dextra also operates its own rebar threading workshop in Hong Kong, providing rebar preparation services for its customers.

Schrägseilbrücke über den Mandovi-Fluss

Schrägseilbrücke über den Mandovi-Fluss

The third bridge over the Mandovi River in Goa is an iconic structure that connects Panaji in Tiswadi Taluka and Porvorim in Bardez Taluka. Positioned between the two existing bridges, it was designed to ease traffic congestion along this route. The bridge was officially inaugurated on January 27, 2019.

As one of the longest cable-stayed bridges in India, the four-lane, 21m-wide, 620m-long continuous span Mandovi River Cable-Stayed Bridge adds architectural beauty to Panaji. Standing 70m above sea level, its central concrete pylons are spaced at 150m and are supported by 88 cables arranged in a single-plane harp-type configuration.

Dextra supplied 1,170 sets of fully-threaded post-tensioning bar systems in diameters of 25, 32, 40, 50, and 75mm, with a grade of 830/1030, for various applications, including:

  • Kleiderbügelstangen
  • Vertikale Vorspannung
  • Horizontale Spannstäbe
  • Hebestangen
  • Anchoring the pier head segment to the pier cap
  • Anchoring the front support to the pier cap
  • Anchoring the front cantilever support to the pier cap
  • Anchoring the middle, rear, and auxiliary supports

King Abdullah Financial District, Saudi-Arabien

King Abdullah Financial District, Saudi-Arabien

Der King Abdullah Financial District (KAFD) ist ein multifunktionaler Geschäfts- und Wohnkomplex in Riad, Saudi-Arabien. Der Bezirk besteht aus über 50 Türmen und soll rund 12.000 Erwerbstätigen Platz bieten.

Dextra Middle East mit Sitz in Dubai ist seit 2009 an der Lieferung mehrerer Baupakete an die Saudi Bin Ladin Group beteiligt, den Hauptauftragnehmer des Projekts.

Gründungspfähle

Um vertikale Verbindungen in Gründungspfählen zu schaffen, lieferte Dextra seine beliebte Bartec Bewehrungsverbindungslösung – der #1 Bewehrungsstab Schraubanschluss im Nahen Osten – über seine Fertigungspartner.

Zusätzlich zu Bartec Kupplungen lieferte Dextra auch Unitec Muffen, die zur Weiterführung der aus den Gründungspfählen herausragenden Stäbe dienten. Unitec bietet eine flexible Lösung für Bauunternehmer, da keine vorherige Vorbereitung des Stangenendes erforderlich ist. Es wird lediglich ein Schlagschrauber benötigt, was die Bedienung insbesondere auf abgelegenen Baustellen erleichtert.

Floß und Säulen

Bartec Kupplungen wurden auch für horizontale Verbindungen in den dicken Fundamentplatten und vertikale Verbindungen in den hervorstehenden Säulen verwendet.

Kernwand-zu-Balken Anwendungen

Im Gebäudeüberbau, Dextra Bartec Kupplungen wurden verwendet, um horizontale Verbindungen von der Kernwand, wodurch das Einfügen von Starterstäben der zweiten Phase ermöglicht wird, die zur Erstellung des Strahls erforderlich sind Bewehrung.

Neue Champlain-Brücke

Neue Champlain-Brücke

The New Champlain Bridge is a 3 km-long bridge spanning the Saint Lawrence River at the southeastern entrance of Montreal, Quebec, Canada. As one of the busiest bridges in Canada, it plays a crucial economic role for the city, serving as a key route to the United States, located 60 km south.

 

Replacing the Older Champlain Bridge

The New Champlain Bridge is replacing the existing Champlain Bridge, which was commissioned in June 1962. The older structure began showing signs of corrosion in 1994. After several temporary safety measures were implemented to keep the bridge operational, a replacement project was initiated in 2007. For a time, both bridges will stand side by side until the older structure is fully dismantled, with most of its materials planned for recycling.

 

A Focus on Corrosion Resistance

The New Champlain Bridge is designed to last at least 125 years and accommodate 50 million vehicle crossings per year. Given the corrosive environment caused by frequent road de-icing, corrosion resistance was a top priority. Duplex stainless steel rebar was installed in critical areas to enhance durability.

For this project, Dextra recommended using Duplex Stainless Steel Rolltec couplers and anchors. This specialized version of our Rolltec® system replaces standard couplers and anchors with an improved duplex steel alternative, offering superior corrosion resistance.

The Rolltec® solution is well-suited to the Canadian market and is approved by the Quebec Ministry of Transport. With a single-operator threading machine and 30-second threading cycles, it provides high productivity, making it ideal for high-labor-cost markets like Canada.

More than 10,000 Stainless Rolltec® couplers were supplied for this project, primarily for bridge spans. These couplers were used to splice large-diameter reinforcement bars, ranging from 35M (#11) to 55M (#18)—the largest size available in our Rolltec® range.

Additionally, about 10,000 Rolltec® stainless steel end anchors were delivered for sizes up to 55M (#18). Rolltec® Headed Bars use the same threading system as the couplers, simplifying production and installation.