The National Highway 44 (NH 44) is the longest highway of India, spanning 3,745km from Srinagar to Kanyakumari.

As time moved forward, the cities close to the highway expanded at such a pace that the neighborhoods adjoining the highway mushroomed to very significant numbers.

As a result, the pedestrians and light vehicles along the two sides of the road often affect the flow and speed of long route heavy vehicles. It also poses a big risk for those local lighter vehicles and pedestrians.

To solve this problem, the Highway Authority of India proposed the road widening to be coupled with flyovers over the stretch wherein the highway is running through densely populated towns.

The 34-km long elevated stretch of highway in Nagpur-Hyderabad area is being constructed to improve the road network between Nagpur and the capital city of Hyderabad.

The authorities selected a segmental construction technology for the elevated bridges, and each heavy segment was casted in the quality-controlled environment of precast yards.

Considering the substantial size of these precast segments, it has been necessary to source easy-to-use lifting material, capable of sustaining high loads.

Dextra hot rolled fully threaded bars were the best fit to those requirements.

More than 100 sets of fully threaded (FT) post tensioning bars for lifting and launching of precast segments with launching girder have been supplied for this project, along with accessories such as end nuts and couplers.

Dextra FT Bar systems are frequently used for temporary applications such as heavy lifting and stitching of precast elements and anchoring of steel frame supports.

In the case of permanent applications, the FT Bars can be used for the connection of girders and piers in segmental bridge construction.

Le pont Temburong, également connu sous le nom de pont Sultan Haji Omar Ali Saifuddien, est situé dans la baie de Brunei, au nord-est du pays. Avec une longueur de 30 kilomètres et quatre voies, c'est l'un des ponts maritimes les plus longs du monde.

Le pont relie Sungai Besar et Mengkubau. Il permet aux voyageurs de voyager entre les deux territoires sans traverser la Malaisie, évitant ainsi les quatre points de contrôle de l'immigration sur l'itinéraire actuel, qui est souvent encombré.

Dextra s'est impliqué dans ce projet en fournissant 34 000 mètres linéaires de tubes Sonitec pour le test d'intégrité des pieux de fondation en utilisant la méthode de test CSL (crosshole sonic logging).

La construction du pont a commencé en 2014 et a été officiellement ouverte à la circulation en 2020.

Source des images : https://www.reduper.com/industry/traffic/bridge/sea-bridge/temburong-bridge/

Barapullah Elevated corridor is a major infrastructure project in India. The main purpose of this extension is to ease traffic congestion, as well as to provide a new express connectivity between Indira Gandhi International Airport and east Delhi.

Reinforcing the elevated road with PT bars

For the construction of this flyover, Dextra has been supplying its fully-threaded PT bars, as well as its well-known Bartec rebar splicing solution to the contractor L&T Construction.
The PT bar systems were applied in temporary applications of the construction project. Dextra fully-threaded post-tensioning bars are currently being used for lifting and launching the precast elements of the expressway’s elevated structures.

The Atlantic Bridge project, also called the Third Bridge Over the Canal, is being developed closed to the Atlantic Ocean entrance of the Panama Canal. This $600M project consists in construction of a 1-kilometer cable-stayed bridge, along with access viaducts on both sides and connections to the existing roads, as well as pedestrian and bicycle lanes. When archived, the bridge will allow vehicles to cross the Panama Canal even when the locks are in operation.

One of the World’s longest concrete cable-stayed bridge with Bartec

With its 530-meter central span and its vertical clearance of 75 meters above sea level allowing the passage of Post-Panamax ships, the four-lane Atlantic Bridge is one of the longest cable-stayed bridges in the World. It is also supported by two delta-shaped main pylons, reaching 212.5 meter height.
Dextra Amérique Latine, with its main office in Panama City, was involved in supplying its rebar splicing solution Bartec for the reinforcement of the bridge’s concrete structure.

More than 350,000 Bartec couplers were delivered to the contractor VINCI Construction Grands Projets for the reinforcement of the bridge’s pile cages, pile caps and pylons for up to #14 (dia. 43 mm.) bars. Plus, three Dextra Bartec machine sets have been used to support the bar-end preparation on site.
Moreover, in order to avoid steel congestion in the heavily reinforced areas, more than 50,000 Dextra end anchors Barres à tête are used in the bridge’s pile caps.

The Atlantic bridge is now in its final construction stage, and is planned to open in early 2019.

Phuoc Khanh bridge is a 4.7-kilometer cable-stayed bridge linking Ho Chi Minh City with Dong Nai. The bridge is part of the southern Vietnam’s longest highway, Ben Luc – Long Thanh Expressway, running through Long An province, Ho Chi Minh City and Dong Nai province.
When completed, the highway will connect the south-western region with the south-eastern region of the country, facilitating the transportation between the two parts of the country with improved traffic flow and larger lanes. The project aims to develop the socio-economic activities of this area.

Barres de post-tension Dextra pour applications permanentes du pont

For the construction of the Phuoc Khanh Bridge, Dextra is supplying its post-tensioning bar systems as permanent post-tensioning anchors.
Over 250 high performance fully-threaded post-tensioning bars and over 200 smooth bar systems were delivered to site. Also known as PT bars, they are specifically designed for post-tensioned applications. They can be corrosion-protected as is the case for the equipment supplied in the project. The corrosion protection is done in a controlled facility in Dextra’s factory, before being shipped to site.

Pour en savoir plus sur nos produits, découvrez les produits Dextra solutions pour ponts et viaducs.

The Tuen Mun–Chek Lap Kok Link (TM–CLKL) is a road project between the Northwest New Territories and Hong Kong – Zhuhai – Macao Bridge, the Airport and North Lantau.

The total length of the road is around 9 km, consisting of two elements which are the Northern Connection and the Southern Connection.
The Northern Connection will join Tuen Mun Area 40 to Hong Kong Port through an undersea tunnel, while the Southern Connection will link the Hong Kong Port and North Lantau Island on viaducts.

Dextra supplied 100,000 Bartec rebar couplers for the structure of diaphragm walls and tunnels.

Full-performance Bartec couplers are an optimal replacement for rebar overlapping, reducing both cost of material and rebar congestion at the lap zone.

Moreover, to avoid rebar congestion in the ventilation building structure, more than 50,000 Headed Bars were applied at the top of the columns. Headed Bars act as a substitute for hook and long development length with more simple and effective anchorage.

The Southern Connection was opened in October 2018. The project is expected to be fully commissioned by 2020.

Pumarejo Bridge is a 3,200m-long bridge including an 800m-long cable-stayed section and 1,300m of viaducts as well as access roads.

The new cable-stayed bridge is located over the Rio Magdalena river in Barranquilla and the Salamanca Island Road Park in Sitionuevo, Colombia.

It replaces the old Puente Pumarejo: with its two lanes, the old bridge was no longer doing justice to the increased traffic, and it quickly became an obstacle for shipping on the Rio Magdalena due to a clearance below of only 16 meters.

The new bridge comprises of 6 lanes of traffic (3 lanes each way), 2 side bike paths and a pedestrian path along its side.

Dextra provided rebar connection solutions that were designed to reinforce the concrete structures.

More than 120,000 Rolltec couplers were provided for pier and deck reinforcements.

In addition, over a thousand of Unitec bolted couplers were applied for the connection rebars without the need of threading.

Since its completion, it became the longest road bridge in the country and one of the largest in Latin America.

Source of images: https://www.khl.com/international-construction/colombias-longest-road-bridge/139582.article, https://commons.wikimedia.org/wiki/File:Puente_ pumarejo.jpg

Étant la nouvelle voie rapide reliant le Centre à l'Est de la Thaïlande, la construction de l'autoroute Bang Pa-In – Nakhon Ratchasima est donc considérée comme l'un des projets d'infrastructure majeurs du pays.

L'objectif principal de ce projet est de stimuler l'économie du pays. Une fois terminé, il reliera les principaux centres urbains de Thaïlande au sein de la sous-région du Grand Mékong.
L'autoroute interurbaine comprend deux tronçons : le tronçon à six voies de 103 kilomètres de Bang Pa-In à Pak Chong et le tronçon à quatre voies de 93 kilomètres de Pak Chong à Nakhon Ratchasima. Démarré en 2016, le projet devrait durer jusqu'en 2020.

La période de réalisation requise du projet de 4 ans étant exigeante, la construction de l'autoroute a été divisée en environ 40 contrats pour accélérer le calendrier du projet.
Afin de minimiser les impacts potentiels sur les résidents locaux, un certain nombre de passages inférieurs, supérieurs et de structures surélevées (par exemple de grands viaducs) sont aménagés tout au long de l'autoroute Bang Pa-In – Nakhon Ratchasima.

Optimisez le projet d'infrastructure avec les coupleurs de barres d'armature de Dextra

Pour la construction de la structure surélevée de l'autoroute, les entrepreneurs de différents lots ont opté pour les coupleurs de barres d'armature Bartec à haute performance de Dextra afin d'économiser du temps et de l'argent sur la connexion mécanique des barres d'armature de diamètre 20 mm à 32 mm.
Grâce au système d'épissure unique de Bartec, toutes les applications (Standard/Position) peuvent être satisfaites par un seul et unique modèle de coupleur de barres d'armature, réduisant ainsi la gestion des stocks du projet au minimum.
En outre, des tubes soniques Sonitec de Dextra ont également été installés pour des tests de diagraphie sonique à trous croisés dans les fondations des structures de l'autoroute interurbaine Bang Pa-In – Nakhon Ratchasima.

Barres de post-tension Dextra pour les structures surélevées de l'autoroute

En plus des solutions d'épissure et de diagraphie de trous transversaux de Dextra, des barres de post-tension lisses et entièrement filetées ont également été utilisées pour des applications temporaires (assemblage de poutres de levage et de lancement) et permanentes dans les segments. Environ 28 000 jeux de deux barres PT ont été livrés en juin 2018.
Pour plus d'informations sur les solutions Dextra en Thaïlande, veuillez contacter notre bureau de Bangkok.

La construction du pont Binh Khanh fait partie du projet vietnamien d'autoroute Ben Luc – Long Thanh, qui traversera Hô Chi Minh-Ville et le sud de la province de Long An et implique la construction de routes de 58 kilomètres de long.
Démarré en 2016 et dont la mise en service est prévue pour 2020, l'objectif principal de ce projet est de développer les installations de transport du pays pour les véhicules rapides.
Pour faciliter la construction de cette autoroute longue de 58 km, le propriétaire du projet Vietnam Expressway Corporation a divisé le projet en trois phases : les sections ouest, centrale et est.

Barres PT lisses et entièrement filetées : solutions de post-tension pour ponts et viaducs

Pour la construction du pont Binh Khanh de 3 kilomètres de long, qui fait partie de la section médiane, Dextra a fourni des barres de post-tension lisses et entièrement filetées. Ceux-ci ont été utilisés dans la structure principale, le hauban, ainsi que dans les approches ouest et est du pont.

Pour plus d'informations sur nos solutions au Vietnam, veuillez contacter notre Bureau de Bangkok.

Thane-Kalwa Creek Bridge is a nearly 2.4-km long U-shaped road bridge over the Thane creek at Kalwa Naka, India, aiming to ease the traffic congestion between Thane and Navi Mumbai along with congestion in Kalwa and Thane city areas.

Dextra delivered more than 20 sets of Tension Rod system in various lengths (maximum length supplied is ~24m), size M108, grade 700, used as suspenders for basket handle bridge/steel arch bridge.

Tension Rods typically act as bracing or suspension elements and provide the benefits of high strength, length adjustability, ease of installation as well as the ability to be post-tensioned after installation. A wide range of sizes and accessories in various steel grades and in both carbon and stainless steel is available.

The bridge was originally scheduled to be opened in 2020, but the pandemic and the subsequent lockdowns significantly delayed the construction.