Grupo Dextra | Conexiones confiables

Cuerda de arco de Valenciennes

Cuerda de arco de Valenciennes

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.

 

Puente de Pelješac

Puente de Pelješac

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.

Autopista Cebu-Cordova Link Expressway (CCLEX), puente colosal en Filipinas

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 Viaducto, 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.

Puente atirantado para conectar Cebú y la isla de Mactán

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 Viaducto 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 Refuerzo of the colossal expressway’s foundations, the contractor has chosen Dextra’s well-known rebar Solución de empalme 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’ Pilote 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 Ganchos, traditionally used for anchoring. For more information about rebar coupler availability in the Philippines, please contact our oficina de bangkok.

Túnel de la puerta oeste

Túnel de la puerta oeste

El Proyecto del Túnel West Gate ofrecerá una alternativa vital al Puente West Gate, proporcionando un segundo cruce de río muy necesario, viajes más rápidos y seguros, y retirará miles de camiones de las calles residenciales.

El proyecto unirá la autopista West Gate en Yarraville con el puerto de Melbourne y CityLink en Docklands a través de túneles gemelos debajo de Yarraville y una carretera elevada Footscray.

El camino elevado incluye 300 pilotes de altura variable. Los pilotes han sido prefabricados en múltiples segmentos, cerca del sitio. Las barras verticales de postensado ensamblan todas las dovelas de cada pilote.

Este método de construcción de pilotes es cada vez más común pero requiere una preparación impecable, tanto en términos de enunciado del método como de definición de productos. Cada detalle es fundamental para el éxito de la instalación.

Dextra suministró a Freyssinet más de 1.000 toneladas de sistemas Freyssibar+, calidad 930/1080 MPa, con diámetros nominales de 72 mm y 55 mm, y 7.500 anclajes para aplicación vertical permanente.

Gracias a una estrecha colaboración entre DEXTRA, el back-office de Freyssinet (Departamento Técnico y empresa de productos Freyssinet) y el personal de obra (Freyssinet Major Project y Freyssinet Australia), el sistema de postensado se ha adaptado perfectamente a las necesidades del proyecto.

Los diámetros de las barras, la calidad del acero y el diseño de los anclajes han sido validados mediante pruebas de calificación según Normas Australianas, demostrando el desempeño del sistema.

Este sistema de barras se puede utilizar para postensado, anclajes al terreno pretensado y cualquier aplicación que implique tirantes temporales o permanentes, elevación, suspensión, empalmes pretensados, etc.

La construcción del importante proyecto comenzó en enero de 2018.

Carretera Bar-Boljare – Cuatro viaductos

Bar-Boljare highway – Four Viaducto

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 Viaducto 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 Viaducto. Dextra Bartec Solución de empalme was chosen on that project for its compliance with ISO 15835 S2, which defines rebar couplers and Refuerzo to be resistant to violent earthquake conditions. A total of 230,000 Bartec rebar couplers have been supplied to CRBC.

Enlace de Doha (Calzada de Jaber)

Enlace de Doha (Calzada de Jaber)

 
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 Solución de empalme

Dextra ha participado en la etapa inicial del proyecto de construcción para proporcionar una solución técnica para el empalme de las jaulas de barras de refuerzo de gran tamaño que forman los pilotes de cimentación en tierra y mar. 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 Pilote efforts.  

Solución de tubo Sonitec

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.

Rehabilitación de Mahatma Gandhi Setu

Rehabilitación de Mahatma Gandhi Setu

El Mahatma Gandhi Setu (también conocido como Gandhi Setu o Ganga Setu) es un puente que cruza el río Ganges en Bihar, India, y conecta Patna y Hajipur. Es el tercer puente fluvial más largo de la India, con una longitud de 5.750 metros.

El puente había experimentado una considerable congestión de tráfico en las últimas décadas como consecuencia del aumento del número de coches que lo cruzaban, lo que había provocado que funcionara al máximo de su capacidad y sobrecargara la estructura. Requirió la sustitución de la superestructura de hormigón por una estructura de acero.

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

También se proporcionaron barras totalmente roscadas para diversas aplicaciones durante la demolición de la antigua superestructura.

El flanco occidental renovado se abrió al público el 31 de julio de 2020.

Calzada que cruza la bahía de Kuwait

Calzada que cruza la bahía de Kuwait (Calzada de Jaber)

 

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.

Pilones y vigas de puentes

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

dextra Barra PT lisa A lo largo de todo el enlace marítimo se utilizaron vigas prefabricadas de calidad 835/1050.

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.

Tubos de registro sónico Crosshole

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.

Una vez instalados, los tubos quedan firmemente en su lugar, soportando sin problemas el levantamiento y manipulación de la jaula.

Carretera Cross Tay Link

Carretera Cross Tay Link

El proyecto Cross Tay Link Road en Perth y Kinross, Escocia, transformará el transporte en la zona. Una de las características notables de este esfuerzo de construcción de carreteras es la inclusión de un puente de tres tramos sobre el magnífico río Tay, el río más largo de Escocia. Este proyecto tiene como objetivo mejorar la conectividad y mejorar la eficiencia de los viajes tanto para residentes como para visitantes.

Para garantizar la integridad estructural de los pilotes de cimentación del puente, Dextra proporcionó una cantidad de 1.920 tubos, lo que equivale a 11.136 metros lineales de Sonitec ST50. Este producto especializado está diseñado para pruebas de integridad de pilotes utilizando el método Crosshole Sonic Logging (CSL). Facilita la evaluación de la calidad y confiabilidad de los pilotes de cimentación, garantizando la estabilidad y seguridad del puente a largo plazo.

Puente Tân Vũ - Lạch Huyện

Puente Tân Vũ - Lạch Huyện

 

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:

  • Para el refuerzo permanente de segmentos de vigas prefabricadas, Dextra suministró Sistemas de barra lisa PT con extremos roscados en tamaños M39 y M49, calidad 835/1030 y 930/1080. Los sistemas de barras Dextra se utilizan para el postensado vertical de segmentos de hormigón.

  • 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.