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Catégorie : Projets

2ème HCMV Environnement Assainissement

Publié sur par Sir Gwi

2ème HCMV Environnement Assainissement

The Second Ho Chi Minh City Environmental Sanitation Project consists of the construction of an interceptor that will convey the wastewater collected from the Nhiêu Lộc-Thị Nghè Canal and District 2 areas of Ho Chi Minh City to a treatment plant.

Dextra has been involved in the construction of the large underground system by supplying 40 Soft-Eyes to assist in the tunnel breakthroughs.

The cuttable Glass Fiber Reinforced Polymer (PRFV) Soft-Eyes were applied to reinforce 21 shafts, allowing penetration by the Tunnel Boring Machine (TBM) without the need to remove steel Armatures and without the risk of damaging the TBM’s head.

With its completion planned for 2022, wastewater services in HCMC will become considerably more sustainable and will be remembered as the first major step toward alleviating the environmental and sanitation issues of the country.

Métro Nagpur, station de métro Zero Mile

Publié sur par Sir Gwi

Métro Nagpur, station de métro Zero Mile

Station de métro Nagpur Zero Mile dans un projet à usage mixte de transport/parking/commercial se déroulant dans la ville de Nagpur, dans l'État du Maharashtra. Il est situé sur la nouvelle ligne de métro traversant la ville du Nord au Sud. La Station Zero Mile est une station de métro combinée à un bâtiment de 12 étages qui accueillera des zones commerciales et un parking d'une capacité de 430 véhicules.

Pour ce projet, Dextra a été impliqué en 2017 pour la fourniture et l'installation d'ancrages au sol pour la stabilisation du sol autour de la zone d'excavation.

Dextra a fourni sa solution innovante d'ancrages actifs ASTEC (FRP) (AAA), un type spécial d'ancrages au sol qui, dans le cas d'applications temporaires, peuvent être laissés dans le sol une fois le projet terminé, même si ceux-ci s'étendent au-delà des limites de propriété ou traversent de futurs tunnels.

En effet, l'un des principaux avantages de la barre d'ancrage FRP est de rendre l'ancre entièrement découpable par l'équipement d'excavation conventionnel, ce qui en fait le meilleur substitut aux ancres amovibles conventionnelles qui sont des ancres en acier qui doivent être retirées du sol par force brute à la fin. de projet.

Les ancrages actifs Dextra ASTEC sont légers à transporter et peuvent être transportés jusqu'à leur emplacement final par les travailleurs. Une fois insérée dans le trou foré, chaque ancre est injectée puis contrainte par l'utilisation de torons PT conventionnels connectés à l'ancre FRP. Après l'installation, l'ancrage peut rester dans le sol, contrairement aux ancrages amovibles classiques qui nécessitent une gestion de projet supplémentaire et génèrent des coûts de retrait d'ancrage en fin de vie.

Pour plus d'informations sur les solutions d'ancrage Dextra en Inde, veuillez contacter notre Bureau de Bombay.

Métro de Doha – Phase 1

Publié sur par Sir Gwi

Métro de Doha – Phase 1

Doha Metro Phase 1 is Qatar’s major infrastructure project consisting of three metro lines with a total length of 164 km. The first phase involves the construction of the Red, Green, and Gold lines and their major stations. It is part of the US$36 billion Doha Metro Rail Network Project, aiming to reduce the city’s road traffic congestion while facilitating the connection between Qatar and other Gulf countries.

The required completion period for this project is extremely short, with excavation starting in mid-2013 and operations expected by 2019. Given the project’s constrained timeline, highly innovative solutions are required to complete the building of underground structures in minimal time.

Dextra’s FRP Active Anchors as Temporary Tie-backs in Retaining Walls

Composite materials have been used for over 20 years as temporary reinforcement in concrete structures. In Doha Metro Phase 1, both Dextra’s post-tensioned carbon-FRP (CFRP) Active Anchors and glass-FRP (GFRP) Active Anchors have been used in retaining walls.

When used as temporary tie-backs, CFRP material offers the most advanced technical solution due to its superior tensile strength, creep resistance, and durability, while GFRP Anchors offer a cost-effective solution without technical compromise.

GFRP anchors can advantageously replace steel removable anchors to prevent encroachment on neighboring plots. As a result, GFRP anchors now account for more than 90% of the FRP anchors installed in the region.

For the first phase of the Doha Metro Rail Network project, Dextra has supplied 150 CFRP Active Anchors and 700 GFRP Active Anchors to date.

ASTEC Soft-Eye for Improved TBM Penetration

Dextra’s ASTEC Soft-Eyes is a unique technology using cuttable GFRP reinforcement as a replacement for conventional steel rebars. Since 1996, this solution has become a standard concept in the design of shafts and subway stations.

More than 10 sets of Dextra’s ASTEC Soft-Eyes had been supplied and used in the Doha Metro construction project as of May 2018.

Mexico – Toluca Inter-city train (Tren Interurbano México – Toluca)

Publié sur par Sir Gwi

Mexico – Toluca Inter-city train (Tren Interurbano México – Toluca)

o reduce traffic congestion on the Mexico–Toluca highway, as well as to ease connections between both cities, the Secretariat of Communications and Transportation (SCT) is constructing a new 55.7-kilometer rail line in the Mexico City area. Aiming to be an environmentally friendly project, the commuter rail line includes a 4.7-kilometer double-tube tunnel in highly complex terrain and protected natural areas.

The new train will connect Toluca Valley to Mexico City and will provide service to an estimated 270,000 commuters. The line includes six stations: two terminals (Zinacantepec and Observatorio) and four intermediate stations (Cristobal Colon, Metepec, Lerma, and Santa Fe). It will also serve as a backbone for regional and urban transport in the Mexico City area.

Construction began in 2015, and the railway was scheduled for completion in 2019.

Light and Productive Rebar Coupler Solution for the Construction Project

For the reinforcement of the railway’s concrete structures, Dextra supplied more than 100,000 Rolltec splices. The system is a practical and economical alternative to laps. Rolltec is also supported by a single rebar preparation machine, and only one operator is needed to run the machine.

In addition, thanks to the performance of our machines, the thread is prepared in less than 30 seconds!

Moreover, with the Rolltec system, the same type of coupler can be used for both standard and position applications, resulting in optimized project inventory.

For more information about our projects in Latin America, please contact our Panama office.

Métro du Caire – Ligne 3

Publié sur par Sir Gwi

Métro du Caire – Ligne 3

Depuis l'ouverture du premier segment de 29 km de la ligne 1 du métro en 1987, le projet de métro du Caire a révolutionné le système de transport en commun de la capitale.
Actuellement, l'ensemble du réseau comprend 3 lignes opérationnelles numérotées de 1 à 3. La ligne 3 se compose de quatre phases et le premier segment a été mis en service en 2012.

Trois nouvelles stations de métro ont été inaugurées dans le cadre de la quatrième phase de la troisième ligne le 15 juin 2019, une semaine avant le coup d'envoi de la Coupe d'Afrique des Nations 2019 (CAN) au Caire.

Dextra a continuellement fourni des solutions de construction depuis l'exploitation de la ligne 2 en 2000, livrant depuis lors plus de :

-1 400 000 coupleurs de barres d'armature

-7 000 tubes soniques

-60 yeux doux

Les coupleurs de barres d'armature Bartec sont utilisés pour le renforcement des barres d'armature des structures de tunnels et de gares sur les lignes de métro souterraines et surélevées afin de réduire la congestion de l'acier et d'améliorer la connexion en traction.

De plus, le test d'intégrité des fondations du métro à l'aide de la méthode de test Cross Sonic Logging (CSL) a été facilité par l'utilisation de tubes soniques SONITEC, conçus pour un assemblage et une installation faciles dans des cages d'armature.

Les yeux souples ASTEC de Dextra sont fabriqués à partir de barres d'armature en PRV pour renforcer les murs en D dans les tunnels souterrains, qui peuvent facilement être coupés par un tunnelier (TBM), ce qui permet des économies de temps et d'argent.

Le projet est toujours en cours et la quatrième ligne du métro du Caire devrait entrer en service en 2020.

Métro de Hô Chi Minh-Ville – Ligne 1 (Métro HCMV, Vietnam)

Publié sur par Sir Gwi

Métro de Hô Chi Minh-Ville – Ligne 1 (Métro HCMV, Vietnam)

Ho Chi Minh City Metro – Line 1 is the first part of the megacity’s 109-kilometer rail line project undertaken by the Management Authority for Urban Railways (MAUR).

Une fois réalisé, le système de transport en commun couvrira les zones de HCMV avec 6 lignes de métro, permettant aux habitants et aux touristes de se déplacer facilement et commodément dans la ville, ce qui se traduira par une meilleure qualité de vie urbaine.

La première phase du projet consiste en la construction d'une ligne ferroviaire de 19,7 kilomètres reliant le marché Ben Thanh et le parc Suoi Tien. Il comprend également la construction d'une voie ferrée surélevée de 17,1 kilomètres avec 11 stations et d'une ligne souterraine de 2,6 kilomètres avec 3 stations.

For the construction of Vietnam’s biggest city, Dextra has been supplying both concrete reinforcement et bar system solutions.
To reduce steel congestion in heavily reinforced areas, the contractor Shimizu-Maeda Joint Operation opted for Dextra’s end anchors. Têtes d'ancrage is a simple alternative to rebar hooks.

L'installation se fait en vissant uniquement la plaque d'ancrage compacte sur l'extrémité de la barre de renfort. La solution facilite finalement le processus, ce qui se traduit par une meilleure qualité de bétonnage.

Grand Paris Express – Line 15

Publié sur par Sir Gwi

Grand Paris Express – Line 15

Le Grand Paris Express is currently the largest transport project in development in Europe.

The new 200km, 68-station automated railway network consists of a ring route around Paris (line 15) and three additional lines (16, 17 and 18) connecting adjacent neighborhoods.

These 4 new lines will circle the capital and link to 3 airports and many business districts. It will transport 2 million commuters a day. The lines are planned to open in stages, with the full completion of the project scheduled for 2030.

The construction of line 15 started in 2015, with its first section between Pont de Sèvres Métro station and Noisy – Champs RER A station.

Création was involved at that stage by providing 100,000 Fortec rebar couplers to connect the columns of the stations’ structure.

Additionally, Dextra supplied 15,000 meters of Sonitec sonic tubes to facilitate the structural integrity testing using the CSL (Cross Sonic Logging) method, thus ensuring the homogeneity of concrete within the deep piles and diaphragm walls that are being constructed for the future underground stations.

The first section of line 15 is scheduled to open in 2020.

Système d’assainissement en tunnel profond (DTSS) – Phase 2

Publié sur par Sir Gwi

Système d’assainissement en tunnel profond (DTSS) – Phase 2

The Deep Tunnel Sewerage System (DTSS) is a used water infrastructure project being developed by the Public Utilities Board (PUB) of Singapore to meet the country’s long-term clean water needs.

DTSS deploys deep tunnels to convey used water to 3 centralised water reclamation plants (WRP) located in the coastal areas.

The used water is then treated and further purified into clean water to be supplied under the brand name NEWater, with excess treated effluent discharged to the sea through outfall pipes.

The project involves the construction of two large tunnels, 6.5m in diameter and with a total length of 80km, located about 50m below the surface, to carry sewage to 3 centralised WRPs.

The project is developed in two phases. The first phase was completed in 2008 and comprises a 48km-long underground tunnel system to channel the flow of water from existing gravity sewers to the Changi WRP in the east and Kranji WRP in the north.

The second phase will extend the tunnel system to the west through a 30km-long south tunnel, 60km of link sewers, the Tuas WRP and a 12-km deep-sea outfall.

For the second phase, Dextra supplied 1,210 rock bolts for stabilising the tunnel excavations and 8 Yeux doux en PRV for TBM breakthrough.

Soft Eye & Rock Bolt

À l'issue de la phase 2, prévue pour 2022, l'usine NEWater du Tuas WRP contribuera à 551 TP3T de la demande totale en eau de Singapour.

De plus, le Tuas WRP traitera 800 000 mètres cubes d’eau usée par jour, ce qui en fera la plus grande installation de bioréacteur à membrane au monde.

Ligne Rouge de Tel Aviv, le premier système de tramway de la ville

Publié sur par Sir Gwi

Ligne Rouge de Tel Aviv, le premier système de tramway de la ville

The Red Line is the first section of the new Light Rail system currently in development in Tel Aviv, Israel. The line will run from Bat Yam in the southwest to Petah Tikva in the northeast.

The total projected length of the line is 24km, comprising 34 stations, 10 of which are underground, including an interchange with Israel Railways services.

For this project, Dextra is currently supplying products for the construction of six of the underground stations including Bialik, Abba Hillel, Arlozorov, Shaul HaMelech, Yehudit and Allenby.

More than 200,000 Bartec rebar couplers were supplied for parois moulées and for the construction of the station boxes.

Dextra also provided 50,000m of Sonitec ST50 to facilitate the testing of the structural integrity of foundation piles using the CSL (Crosshole Sonic Logging) method.
Sonitec is an easy-to-assemble and time-saving sonic tube solution, preferred among Pieux and general contractors worldwide for more than 20 years.

The line is currently scheduled for completion in October 2021, making it the second underground service operating in Israel.

Ligne MRT Sungai Buloh-Serdang-Putrajaya (SSP)

Publié sur par Sir Gwi

Ligne MRT Sungai Buloh-Serdang-Putrajaya (SSP)

The Malaysian SSP Line is the second line of Klang Valley’s MRT System. The main purpose of this project is to provide a better railway infrastructure and transport system in order to serve Malaysia’s growing population.

Commuting through the heart of the Capital

The Malaysian SSP Line will connect Sungai Buloh to Putrajaya, running through the center of Kuala Lumpur and its suburbs. With its 35 stations, among which 11 will be providing connections to other lines, the SSP Line will allow commuters to transfer with ease to and from existing and planned rail lines.
The rail transit system involves the construction of more than 52 km: 13.5km of underground line and a 38.7km of elevated rail. Once operational, it is expected to have a ridership of 529,000 passengers per day.

Rebar couplers for D-wall and slab

For this large metro project, the contractor joint venture MMC-Gamuda has chosen Dextra’s popular rebar reinforcement solution Bartec, supported by 3 sets of bar-end high-productivity equipment. Approximatively 200,000 pieces have been delivered as of April 2018.
Création Bartec have been used for productivity reasons. Couplers were embedded in the diaphragm walls surrounding the underground stations, providing horizontal connection points at a later stage of the project. After excavation, couplers are used to connect bars and start the station’s slabs.

For more information about our solutions in Malaysia, please contact Dextra’s Kuala Lumpur office.