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Kategorie: Straßen und Brücken

Valenciennes-Bogensehne

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Valenciennes-Bogensehne

The Valenciennes Bowstring is a 2-kilometer-long bridge construction project that will connect the Saint-Saulve roundabout with the Bruay-sur-l’Escaut roundabout (North). It features a 76-meter-long bowstring bridge, a double-girder engineering structure, a pedestrian footbridge, and a wildlife passage.

Dextra, in collaboration with its local partner, Freyssinet, supplied a tension rod system as a hanger for the bowstring arch bridge on the bypass, ensuring the structure’s stability.

The tension rod system is renowned not only for its high performance but also for its customizable parameters, including design load, surface finish, and corrosion resistance, to meet all technical and aesthetic project requirements.

 

Pelješac-Brücke

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Pelješac-Brücke

The Pelješac Bridge construction aimed to connect the mainland to the Pelješac Peninsula, eliminating the need for ferry services and significantly reducing travel time between these regions. Dextra’s Fortec couplers played a pivotal role in connecting the pile reinforcement cages, ensuring the bridge’s structural stability.

A total of 85,000 Fortec couplers, in sizes ranging from 16-50 mm, and in Types A, B, and C, were used in the construction of the Pelješac Bridge. These couplers securely connected the pile reinforcement cages, ensuring the long-term stability and safety of this critical infrastructure.

Cebu-Cordova Link Expressway (CCLEX), riesige Brücke auf den Philippinen

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Cebu-Cordova Link Expressway (CCLEX), a colossal bridge in the Philippines

Cebu–Cordova Link Expressway is one of the biggest infrastructure projects being undertaken in the Philippines. The project features a combination of a causeway, a gigantic cable-stayed bridge that will cross the navigable zone of the Cebu Strait, two Viadukt, and four low-height bridges, as well as roadways and pedestrian walkways. The CCLEX Project aims to provide better transport facilities while reducing traffic congestion in the region, as well as to improve connectivity within Cebu City. It is also intended to support Cordova’s economic growth, as the expressway will position the city as the gateway for island tourism. Also known as the Third Mandaue–Mactan Bridge, the official groundbreaking of the toll bridge was in 2017, with the completion being scheduled for 2022.

Schrägseilbrücke zur Verbindung von Cebu und Mactan Island

After its completion, the Cebu-Cordova Expressway will link the Cebu mainland and Mactan Island through Cordova town. The 8.5 km-long toll bridge will feature two lanes that will serve up to 40,000 vehicles a day. The main bridge will be built with a 400-meter cable-stayed main span, with 60-meter navigation clearance, allowing ships to easily navigate through the expressway. The main bridge of the expressway will connect the Guadalupe River to Shell Island in Cordova, while its colossal Viadukt will link it to the causeway and road networks to Mactan.

Dextra Bartec, reinforcing solutions for the construction of the Cebu-Cordova Bridge

The design and the construction of this megaproject are undertaken by the Cebu Link Joint Venture (CLJV). The CLJV is a joint-venture partnership between the Spain-based Acciona Construccion S.A. and the Philippines-based First Balfour Inc. and D.M. Consunji Inc. For the Bewehrung of the colossal expressway’s foundations, the contractor has chosen Dextra’s well-known rebar Schraubanschluss Bartec. More than 35,000 units of Standard, Bridging, and Transition splices of steel grade 75, both in diameters 40 and 50, have been applied to the foundations’ Pfahlkonstruktion cages as of July 2018. Moreover, to provide better end anchorages in congested areas, the CLJV opted for Dextra Bartec headed bars, which are also known as end anchors. Bartec end anchors are a convenient alternative to Endhaken, traditionally used for anchoring. For more information about rebar coupler availability in the Philippines, please contact our Büro in Bangkok.

Westtor-Tunnel

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Westtor-Tunnel

Das West Gate Tunnel-Projekt wird eine wichtige Alternative zur West Gate Bridge darstellen, eine dringend benötigte zweite Flussüberquerung ermöglichen, schnellere und sicherere Fahrten ermöglichen und Tausende von Lastwagen aus Wohnstraßen entfernen.

Das Projekt wird den West Gate Freeway in Yarraville über zwei Tunnel unter Yarraville und eine erhöhte Footscray Road mit dem Hafen von Melbourne und CityLink in den Docklands verbinden.

Die Hochstraße umfasst 300 Pfähle unterschiedlicher Höhe. Die Pfähle wurden in mehreren Segmenten baustellennah vorgefertigt. Vertikale Vorspannstäbe verbinden alle Segmente jedes Pfahls.

Diese Pfahlkonstruktionsmethode wird immer häufiger verwendet, erfordert jedoch eine einwandfreie Vorbereitung, sowohl hinsichtlich der Methodenbeschreibung als auch der Produktdefinition. Jedes Detail ist für den Erfolg der Installation von entscheidender Bedeutung.

Dextra belieferte Freyssinet mit mehr als 1.000 Tonnen Freyssibar+-Systemen der Güteklasse 930/1080 MPa, mit Nenndurchmessern von 72 mm und 55 mm sowie 7.500 Verankerungen für den vertikalen dauerhaften Einsatz.

Durch eine enge Zusammenarbeit zwischen DEXTRA, dem Freyssinet-Backoffice (technische Abteilung und Freyssinet-Produktunternehmen) und den Mitarbeitern auf der Baustelle (Freyssinet Major Project und Freyssinet Australia) wurde das Vorspannsystem perfekt an die Anforderungen des Projekts angepasst.

Die Stabdurchmesser, die Stahlsorte und das Design der Verankerungen wurden durch Qualifizierungstests gemäß australischen Standards validiert und demonstrierten die Leistung des Systems.

Dieses Stangensystem kann zum Spannen von Pfosten, vorgespannten Bodenankern und für alle Anwendungen verwendet werden, bei denen temporäre oder dauerhafte Zugstangen, Hebe-, Aufhängungs-, vorgespannte Verbindungen usw. beteiligt sind.

Der Bau des Großprojekts begann im Januar 2018.

Autobahn Bar-Boljare – Vier Viadukte

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Bar-Boljare highway – Four Viadukt

The Bar-Boljare Highway Project is a key infrastructure project led by the Ministry of Transportation and Maritime Affairs of Montenegro. It aims at improving the connections within the country and also between Montenegro and the rest of Europe to boost the country’s economy and tourism.

The project, built by China Road and Bridge Corporation (CRBC), embodies a new successful example of the cooperation between China and Eastern Europe. The new 2×2-way highway spans over 40 km. It is built in challenging terrains and yet satisfies both EU & Montenegro standards of road infrastructure. Its schedule is ambitious too: both roads and Viadukt should be built in under 4 years. For the Bar-Boljare Highway Project, Dextra supplied its Bartec rebar coupler solution, used for the splicing of rebar in the piles of the four Viadukt. Dextra Bartec Schraubanschluss was chosen on that project for its compliance with ISO 15835 S2, which defines rebar couplers and Bewehrung to be resistant to violent earthquake conditions. A total of 230,000 Bartec rebar couplers have been supplied to CRBC.

Doha Link (Jaber Causeway)

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Doha Link (Jaber Causeway)

 
Doha Link is a marine bridge project currently being built west of Kuwait City. It will ultimately be connected to the Main Causeway Across Kuwait Bay, another sea link project north of Kuwait City, which will make the Jaber Causeway sea link, one of the largest civil engineering projects ever built in the Middle East. The Doha Link stretches west of Kuwait City. It will ultimately solve traffic congestion and offer a direct itinerary thanks to a 7.7 km bridge structure built on shallow waters across the Kuwait Bay.  

Rebar Schraubanschluss

Dextra war in der frühen Phase des Bauprojekts beteiligt, um eine technische Lösung für das Spleißen der sehr großen Bewehrungskörbe zur Herstellung der Onshore- und Offshore-Gründungspfähle bereitzustellen. Rolltec® couplers for large diameter rebar (32, 36, and 40mm) were used for the connection of cages and piers. Two grades of rebar are used across the project: ASTM Grade 60 and Grade 80. Rolltec is compatible by design with the higher ASTM Grade 80; the same couplers may be used on all applications, simplifying stock keeping. In addition, smaller diameter couplers for rebar 12mm and 16mm were used for the superstructure and the footing of light poles. One of the main advantages of Rolltec for remote projects is its very light machine setup. Rolltec is supported by a single one-man machine, offering a high level of productivity. Because the equipment is relatively small and the rebar preparation efforts were taking place simultaneously on both sides of the sea link construction, Dextra dispatched up to 4 machines on each side of the project to support the Pfahlkonstruktion efforts.  

Sonitec-Röhrenlösung

With large piles of 2.5m diameter and 60m depth on average, it was compulsory for GS E&C to conduct sonic logging tests to examine the integrity of concrete piles, requiring the installation of 8 tubes in each cage. To achieve very long tube length and optimize cage preparation output, Dextra Sonitec was the preferred choice of the contractor. Thanks to its lightweight and unique Push-Fit® connection feature. Sonitec provides enough flexibility during the cage construction, lifting, and assembly of the cage and removes the need for additional time-consuming welding operations.

Mahatma Gandhi Setu Rehabilitation

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Mahatma Gandhi Setu Rehabilitation

Die Mahatma Gandhi Setu (auch bekannt als Gandhi Setu oder Ganga Setu) ist eine Brücke, die den Ganges in Bihar, Indien, überspannt und Patna und Hajipur verbindet. Mit einer Länge von 5.750 Metern ist sie Indiens drittlängste Flussbrücke.

In den letzten Jahrzehnten kam es auf der Brücke zu erheblichen Verkehrsstaus, da immer mehr Autos über die Brücke fuhren, was zu einer Überlastung der Brücke und einer Überlastung des Bauwerks führte. Der Betonüberbau musste durch einen Stahlrahmen ersetzt werden.

Dextra participated in this renovation project by supplying RepairGrip couplers for the connection of old Pfeiler and new Pfeiler caps.

Auch beim Abbruch des alten Überbaus wurden Vollgewindestäbe für verschiedene Anwendungen bereitgestellt.

Die renovierte Westflanke wurde am 31. Juli 2020 der Öffentlichkeit zugänglich gemacht.

Damm über die Kuwait-Bucht

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Damm über die Kuwait-Bucht (Jaber Causeway)

 

The Main Causeway across the Kuwait Bay is a 36-km-long project currently being built north of Kuwait City. It will ultimately be connected to Doha Link, another sea link project west of Kuwait City, which will connect the Jaber Causeway sea link, one of the largest civil engineering projects ever built in the Middle East.

The main causeway across Kuwait Bay stretches north of Kuwait City. It is expected that the link will greatly contribute to the development of the northern part of Kuwait. To achieve that, the Causeway will literally cut across Kuwait Bay with a 27-km sea link.

Brückenpylone und Träger

For the visible part of the sea link, Dextra worked with contractor Hyundai to offer high-tensile post-tensioning bar solutions.

Die Anfänge Smooth PT Bar Für die Verbindung der Fertigteilträger untereinander wurde entlang der gesamten Seeverbindung Stahl der Güteklasse 835/1050 verwendet.

For part of the sea link, which is topped by a metallic cable-stayed structure. Higher performance bars in Grade 1050/1200 were used to offer a vertical anchoring point between the pylon and the reinforcement of the pile. PT Bars were delivered with a full corrosion protection accessory set by Dextra so that the bars will resist the marine conditions.

Crosshole Sonic Logging-Röhren

For the concrete integrity testing of the onshore and offshore foundation piles, Dextra supplied around 400,000 linear meters of Sonitec tubes, which are easy to set up and reconnect without the need for welding, which significantly increases the productivity of the pile assemblies.

Nach der Installation sitzen die Rohre fest an ihrem Platz und unterstützen problemlos das Heben und Bewegen des Käfigs.

Überqueren Sie die Tay Link Road

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Überqueren Sie die Tay Link Road

The Cross Tay Link Road project in Perth and Kinross, Scotland, is set to transform transportation in the area. One of the notable features of this road construction endeavor is the inclusion of a three-span bridge over the magnificent River Tay, the longest river in Scotland. This project aims to enhance connectivity and improve travel efficiency for residents and visitors alike.

To ensure the structural integrity of the bridge’s foundation piles, Dextra provided a quantity of 1,920 tubes, amounting to 11,136 linear meters of Sonitec ST50. This specialized product is designed for pile integrity testing using the Crosshole Sonic Logging (CSL) method. It facilitates the evaluation of the quality and reliability of the foundation piles, ensuring the bridge’s long-term stability and safety.

Tân Vũ – Lạch Huyện-Brücke

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Tân Vũ – Lạch Huyện-Brücke

 

The Tan Vu–Lach Huyen Bridge is a 5.4-km-long bridge located east of Hai Phong, in the north of Vietnam. The bridge is connecting the Hai Han district (east of Hai Phong) to the new port of Lach Huyen, located on the island district of Cat Hai. This will also allow the port of Lach Huyen to be directly connected to the Hai Phong/Hanoi highway, drastically reducing the transit time to Vietnam’s capital city.

The bridge project is part of a broader infrastructure plan: the Tan Vu–Lach Huyen highway infrastructure project, which aims to develop Hai Phong as a main transportation hub in the North of Vietnam.

For this bridge project, Dextra supplied two types of post-tensioning systems:

  • For the permanent reinforcement of precast girder segments, Dextra supplied PT smooth bar systems with threaded ends in sizes M39 and M49, grade 835/1030 and 930/1080. Dextra bar systems are used for the vertical post-tensioning of concrete segments.

  • For the lifting and temporary fixing of the precast girder segments during the construction phase, Dextra supplied its fully threaded bar systems in diameters 32 and 36, grade 1080/1230.

For all temporary applications such as lifting and fixing operations, fully threaded PT bar systems are a convenient and economical solution, as they can easily be cut, adjusted, and reused several times. Thanks to their continuous thread, the bars can be spliced at any point by the use of couplers or turnbuckles, which are also available from Dextra.

For more information and engineering support regarding post-tensioning systems in Vietnam, please contact our office in Bangkok.