La ligne orange MRT de Bangkok est l'une des lignes de transport en commun rapide prévues par la Mass Rapid Transit Authority of Thailand (MRTA). L'objectif principal de cette ligne ferroviaire de 39,5 kilomètres est d'améliorer la connexion entre les parties occidentale, centrale et orientale de Bangkok, et ainsi de réduire les embouteillages dans la capitale thaïlandaise. Ce projet fait également partie du plan thaïlandais visant à stimuler l'économie nationale et à améliorer les infrastructures.
La ligne orange du MRT est séparée en deux sections : de Bang Khun Non au centre culturel thaïlandais et du centre culturel thaïlandais à Min Buri – comprenant 22 stations souterraines et 7 stations surélevées.

Dextra GFRP Soft-Eyes pour la construction de tunnels

Pour la section Centre culturel thaïlandais – Min Buri, l'entrepreneur Joint-Venture de développement italo-thaïlandais et CKST ont opté pour plus de 40 unités de la solution clé en main de Dextra pour le tunnelage FRP Soft-Eye.
Bien connu pour sa technologie de découpe unique, le polymère renforcé de fibres de verre (GFRP) Soft-eye facilite les effractions et les ruptures du tunnelier (TBM). Il s’agit en fait de la meilleure alternative au renforcement conventionnel en acier – qui nécessiterait la mobilisation de main d’œuvre et d’équipements supplémentaires.

Dextra Sonitec pour les tests Crosshole Sonic Logging (CSL)

Afin de vérifier l'intégrité du béton dans les fondations profondes, Italian-Thai Development, CKST JV et Unique Engineering ont également choisi les tubes de diagraphie sonique à trous transversaux de Dextra – Sonitec. Ces tubes CSL sont disponibles en plusieurs diamètres, et ont été spécialement conçus pour une manipulation facile et rapide afin d'accélérer la vitesse de construction. Plus de 30 000 tubes ont été livrés au projet en mars 2022.

Solutions complètes d'épissure de barres d'armature appliquées aux murs en D du métro

Pour optimiser le renforcement des parois moulées (murs D), Bartec, l'un des systèmes d'épissage mécanique des barres d'armature de Dextra, a été installé. Grâce à sa facilité d'installation, Bartec permet d'accélérer le calendrier des projets et de réduire les stocks car le coupleur standard peut également être utilisé pour les épissures de position. Plus d'un million de coupleurs Bartec ont été livrés sur le site.

De plus, environ 7 000 barres à tête ont été installées à l'extrémité de la barre de renfort comme alternative aux crochets dans les zones encombrées de la structure.

Pour plus d'informations sur nos solutions disponibles en Thaïlande, veuillez contacter notre Bureau de Bangkok.

High Speed 2 (HS2) is a planned high-speed railway system in the United Kingdom.

Currently under construction, the first phase will connect London to Birmingham, with a total length of 176 kilometers.

This will be the second major high-speed rail line in Britain, after the 108-km High Speed 1 (HS1) line opened in November 2007.

One of the largest construction sites of this project is at Long Itchington Wood, where a 1-mile twin bore tunnel is under construction.

In order to launch the tunnel boring machine (TBM) a one-square-kilometer north portal site have been prepared, requiring a large and deep excavation, with 250,000 cubic meters of material being excavated in layers, before being transported and deposited locally to form environmental embankments for the main line.

The decision of building the tunnel has been taken in order to preserve a section of ancient woodland at Long Itchington Wood.

Dextra has supplied almost 20,000 Griptec standard and position couplers in diameter 12mm to 40mm for the connection of steel rebars in diaphragm walls, pile caps and portals. Griptec connection is made from the connection of one male and one female sleeve, both extruded onto the rebar.

In the first phase of the construction, the female sleeves were installed at the top of the diaphragm wall, and then connected to the male sleeves on L-shaped bars in the roof slab through position assembly, which is the splicing method used when both rebars cannot be rotated, to reinforce the connection to pile caps.

In the third phase, the couplers were used as a crown beam, connecting via lap length to the bent bars of the second phase.

Upon its completion in 2022, this world-class high-speed railway system will drastically improve connectivity across the Midlands and beyond.

Source of images: https://www.linkedin.com/feed/update/urn:li:activity:6776829261971021824/, https://mediacentre.hs2.org.uk/news/first-reveal-of-hs2s-extensive-long-itchington-wood-tunnel-north-portal-site-in-warwickshire, https://www.youtube.com/watch?v=ZCc1sKCeAxA, https://www.youtube.com/watch?v=dfu2AuacPKc

Le monorail du Caire est un système de transport rapide monorail à deux lignes situé au Caire, en Égypte, actuellement en construction. Une fois le projet terminé, les deux lignes fourniront les premières liaisons de transport public entre la nouvelle capitale administrative et la ville du 6 Octobre et la zone métropolitaine du Caire.

La ligne de 54 kilomètres entre la nouvelle ville administrative et l'est du Caire prendra 60 minutes, tandis que la ligne de 42 kilomètres entre la ville du 6 octobre et Gizeh prendra 42 minutes.

Dextra a fourni plus de 300 000 coupleurs standards et de pontage Bartec pour la connexion de deux barres d'armature. Bartec est simple à installer et ne nécessite pas de main-d'œuvre professionnelle qualifiée, ce qui réduit la main-d'œuvre sur le chantier, les coûts de coffrage et augmente la sécurité du chantier.

Environ 400 000 barres à tête Bartec ont également été installées pour remplacer les barres droites ou à crochets dans les éléments et connexions en béton.

De plus, le chantier a utilisé des coupleurs boulonnés Unitec lors des travaux de réparation pour la connexion de deux barres d'armature qui n'avaient pas été préparées au préalable (c'est-à-dire sans filetage).

La première étape du système sera ouverte au public en 2022, suivie d'une deuxième étape en 2023.

The Forrestfield Airport Link is a rail infrastructure project lolcated in Perth, Western Australia. The 8.5-km line will connect the existing Midland Line to Perth International Airport and further to the eastern suburbs. The project features two twin-tunnels bored with Tunnel Boring Machines (TBMs) which move up to 26 meter underneath the bed of Swan river, highways and Perth Airport, adding three new stations to the city’s transportation network: Belmont, Airport Central and Forrestfield.

For the tunnel boring packages, Dextra supplied a total of 10 Yeux doux en PRV between 2016 and 2017 (two for Airport Central Station, two in Abernethy, four in Belmont and two in Bayswater) to the contractor JV of Salini Impregilo and NRW Salini Impregilo. Soft-Eyes are rebar cages made mostly of Glass-Fiber Reinforced Polymer (GRFP) bars and some steel rebar. Soft-Eyes can be cut by the TBMs and allow faster equipment breakthrough, saving precious time while avoiding to damage the TBM heads.

Dextra also supplied a total of 65,000 Griptec connections for the station works. Griptec is distributed in Western Australia by Dextra’s partner InfraBuild Construction Services. They offer the complete service to the contractor: Cutting the rebar, preparing the bar ends with Griptec sleeves and bending them for final installation on site. This allows the contractor to achieve faster cycle times in rebar connection on site .

Sonitec, Dextra’s steel tubes for Crosshole Sonic Logging tests (to check concrete integrity in bored piles) were also supplied.

The Forrestfield-Airport Link will operate in 2022.

For more information about our solutions in Australia, please consult our Bangkok bureau

Brussels Metro is a rapid transit system that serves a large portion of the Brussels, Capital Region of Belgium. It consists of 4 conventional metro lines and 3 pre-metro lines.

Line 3 is tram line that runs through the city center from Churchill in the south to Esplanade in the north, using the North-South Axis tunnel. The total route will be 10.3km long.

An 150m long new tunnel is being dug underneath the Brussels North railway station to connect two existing underground tunnels. It will be an important component of the new metro link.

Dextra supplied Sonitec, a tube solution invented to facilitate the integrity testing of foundations using the CSL testing method, to the construction site of Line 3. 13 kilometers of the tubes were installed in the 18m long pile cages.

Sonitec system have been designed for the sole purpose of facilitating the assembly and installation of long tube lengths in reinforcement cages.

The Cairo Metro is the rapid transit system in Greater Cairo, Egypt. It was the first of three full-fledged metro systems built in Africa, as well as the first in the Arab world. It began service in 1987 as Line 1 between Helwan and Ramsis Square, covering a distance of 29 kilometers.

The Cairo Metro currently has 74 stations, 3 of which are transfer stations, with a total length of 89.4 kilometers as of August 2020. There are three operating lines in the system, numbered from 1 to 3.

The new Line 4 will run from Makram Ebeid Station to Police Academy Station near the Ring Road, with bored tunnels following Doctor Hassan El-Sherif Street and Ahmed El-Zomor Street. It will be 24 kilometers long in total. Construction began in Q3 2019 and is expected to be completed in 2024.

Dextra has supplied 450,000 Bartec+ couplers and 42 GFRP soft-eyes for the reinforcement of the diaphragm walls.

Bartec+ is a mechanical splicing system with parallel threads for connecting concrete reinforcement bars with diameters ranging from 12 to 50 mm (ASTM #4 to #18). Its threaded bar end is tensile tested at 90% of the rebar yield strength.

Dextra’s GFRP soft-eye is an integrated turn-key solution that uses cut-able Glass Fiber Reinforced Polymer (GFRP) reinforcement as an alternative to traditional steel rebars, allowing the penetration of Tunnel Boring Machines (TBM) to pass through diaphragm walls with ease.

The Lucknow Metro project is built to serve growing population of Uttar Pradesh, North India, as well as to serve the areas that are not connected by the existing rail system. The 35-kilometer rail system comprises 22 stations, of which 19 will be elevated.
The first phase of the project consists in construction of 2 rail lines (North- South and East-West corridor), connecting four corners of Lucknow by running through the heart of the city. Being implemented by Lucknow Metro Rail Corporation (LMRC), the Phase 1 comprises the construction of 22.88-kilometer long North-South corridor. The priority section is 8.5 kilometers, linking Transport Nagar to Charbagh.
Once operational, the Lucknow Metro will help ease the traffic in the city, and will also reduce commuters’ travel time.

Le métro de Lima est un système de transport en commun rapide au Pérou, reliant actuellement le quartier de Villa El Salvador, au sud de Lima, à San Juan de Lurigancho, au nord-est de la ville. La ligne 1 du métro a commencé ses opérations en 2011 avec 26 stations, totalisant 34,6 kilomètres, la plus longue ligne de métro des Amériques.

Dextra participe à la construction de la ligne 2 du métro et à la première tranche de la ligne 4 qui ont débuté simultanément en 2016. La ligne 2 est une ligne souterraine de 27 km, reliant le quartier d'Ate (Lima) et la région de Callao attenante à la capitale. La ligne 4 est un tronçon de 8 km qui reliera la ligne 2 à la station de l'aéroport international Jorge Chávez.

Plus de 160 000 coupleurs de barres d'armature Rolltec ont été fournis sur le chantier de construction de Metro pour éviter l'encombrement des barres d'armature dû à la méthode traditionnelle de chevauchement.

Plusieurs types de coupleurs Rolltec ont été installés dans diverses parties des structures des stations, notamment les coupleurs standards de taille #8, #11 et #14, et les coupleurs de transition de taille #8 et #11.

La ligne complète sera opérationnelle en 2024.

Etihad Rail is a 1,200-kilometer railway project that will be the first national freight and passenger railway network in the United Arab Emirates (UAE), connecting the seven emirates and promoting trade and social development in the Emirate and across the GCC countries.

The railway project is expected to be a sustainable alternative for freight and passenger transportation throughout the Emirate’s urban and rural areas. It is expected to carry approximately 16 million passengers and 50 million tons of cargo. It will make a significant contribution to lowering road traffic emissions.

The Etihad Rail network reaches the borders of Qatar and Saudi Arabia in the west. The western section connects to Saudi Arabia via Ghweifat, while the eastern section connects to Oman via Al Ain. The railway line connects Abu Dhabi, Sharjah, and Dubai and runs across the Emirate. Then it goes on to the northern emirates and Fujairah.

The rail network will be built in 3 stages. The first phase of the railway network, which opened in 2016, is a 266-kilometer-long western stretch between Al Ruwais and Shah. It connects Ruwais and Habshan, and then Habshan and Shah.

The second phase connects Abu Dhabi with Dubai. It is also linked to the ports of Jebel Ali, Musaffah, and Khalifa. The third phase entails connecting the northern Emirates. The second and third phases are scheduled for completion in 2024.

Dextra is currently supplying various engineered solutions for the second phase of rail network construction, which includes the construction of a 200km main line in Abu Dhabi and a 40km branch line to Khalifa port, a 78km main line in Dubai and a 20km branch line to Jebel Ali port, a 98km main line from Sharjah to Fujairah and a 29km branch line to Tawyeen, as well as associated facilities.

These solutions were delivered to the railway tunnel construction site.

Source of top image: https://filipinotimes.net/news/2019/12/19/coming-soon-rail-network-linking-dubai-fujairah-khorffakan-ports/