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Lima Metro

Lima Metro

The Lima Metro is a rapid transit system in Peru, currently linking Villa El Salvador district in the south of Lima with San Juan de Lurigancho, in the northeast area of the city. The Metro Line 1 started its operation in 2011 with 26 stations, making a total of 34.6 kilometers, the longest metro line in the Americas.

Dextra participates in the construction of Metro Line 2 and the first stage of Line 4 that began simultaneously in 2016. Line 2 is a 27-km underground line, linking Ate district (Lima) and the Callao region adjoining the capital. Line 4 is an 8-km section that will link Line 2 with Jorge Chavez International Airport station.

More than 160,000 Rolltec rebar couplers have been provided to the Metro construction site to avoid rebar congestion of the traditional overlapping method.

Several types of Rolltec couplers were installed in various parts of the stations’ structures, including standard couplers size #8, #11 and #14, and transition couplers size #8 and #11.

The full line will be operational in 2024.

Etihad Rail

Etihad Rail

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.

  • 110,000 Bartec couplers for concrete structure reinforcement.
  • 32,000 Sonitec tubes for the CSL (crosshole sonic logging) testing of foundation piles.
  • 69,000 steel rock-bolts for stabilizing rock excavations.
  • 400 GFRP (Glass Fiber Reinforced Polymer) rock-bolts.
  • 660 umbrella pipes for stabilizing tunnel headings.
  • Source of top image: https://filipinotimes.net/news/2019/12/19/coming-soon-rail-network-linking-dubai-fujairah-khorffakan-ports/

    Relocation of Sha Tin Sewage Treatment Works to Caverns

    Relocation of Sha Tin Sewage Treatment Works to Caverns

    The Sha Tin Sewage Treatment Works Relocation project is a project to relocate the Sha Tin Sewage Treatment Works (STW) in Sha Tin, Hong Kong, which is currently located at the mouth of the Shing Mun River, to the cavern site at Nui Po Shan of A Kung Kok on the opposite bank, freeing up the existing site for uses beneficial to people’s livelihood and improving the local living environment.

    The future Sha Tin Cavern STW will be the largest of its kind in Hong Kong, occupying 14 hectares of land. It will have the same treatment capacity as the current one, but will use advanced sewage treatment technology to meet local population demands and improve services for residents.

    For the tunneling works, Dextra has supplied around 800 pieces of GEOTEC™ GFRP rock-bolts for the tunnel’s temporary supporting.

    GEOTEC™ GFRP rock-bolts are made of cut-able glass fiber reinforced polymers, making them perfect for face bolting or any other tunneling and mining application where further excavation is required.

    Source of images: https://ststwincaverns.hk/

    Singapore Circle Line (CCL) – Stage 6

    Singapore Circle Line (CCL) – Stage 6

    The Circle Line (CCL) is an underground Mass Rapid Transit line in Singapore. The 35-km, 30-station line runs from Dhoby Ghaut and Marina Bay in the Central Area to HarbourFront in the south.

    It is one of the world’s longest driverless rapid transit lines.

    In 2013 the Circle Line stage 6 was announced, a 4-km extension to finally close the circle of the CCL by connecting HarbourFront station to Marina Bay station.

    Three additional stations are under construction and expected to be operational in 2025.

    Well-known expertise and quality in concrete reinforcement solutions were necessary to tackle this project, and Dextra’s Bartec couplers were chosen for several parts of the Circle Line structure, including starter bars, slabs, and column joints.

    By the end of the project, approximately 200,000 couplers will be delivered on site.

    Moreover, Dextra provided 3,000m of Glass Fiber Reinforced Polymer (GFRP) rebars, that can boast some key benefits with respect to metal rebars: a lighter weight, no risk of corrosion, and a lower susceptibility to attract lightning strikes.

    On top of that, Dextra was entrusted with the reinforcement of the concrete structure of the tunnels: 8 Astec Soft-Eyes were used to facilitate the penetration of the Tunnel Boring Machines (TBM) through diaphragm walls, thanks to their innovative cuttable GFRP structure.

    Forest City Johor 森林城市

    Forest City Johor 森林城市

    Forest City is a massive mixed-use urban development taking place in the Southern tip of Malaysia, in the Iskandar region, Johor. The development is taking place on reclaimed land just across the Johor Straight, in sight of Singapore.

    The project, which will continue over the next decade, aims ultimately to create 300,000 residential units, hosting as many as 700,000 people, as well as numerous commercial buildings.

    The Forest City project is expected to fuel the region economy, as well as Singapore, as light rail and road links will ultimately make the connection across the strait with the island state.

    Dextra has been involved since the early phases of the project for the supply of its Groutec S precast solution. Groutec allow the swift connection of precast columns and panels, without the need of in situ joints, speeding up the construction project. For the Forest City Project, Groutec S couplers (compact models) were used to connect the panels making the residential towers shear walls.

    The Forest City project is supported by the installation at site of several sets of Bartec threading equipment, which prepare the bars with threads in order to perform the connection with the top part of the Groutec sleeve. Dextra aftersales team also provided training and support in order to guarantee high production levels during all the project duration.

    For more information about the availability of precast solutions in Asia, please contact our Bangkok office

    AVE Palencia-Santander HSR Package 1 (Palencia – Palencia Norte) & Package 2 (Palencia Norte – Amusco)

    AVE Palencia-Santander high-speed rail project is a significant infrastructure undertaking aimed at connecting Palencia and Santander in Spain. This project involves the construction of extensive railway networks, viaducts, and bridges, underscoring the need for a strong and resilient foundation. Recognizing the critical importance of ensuring the structural integrity of the concrete piles, the project management sought advanced testing methodologies.

    Dextra played a pivotal role in ensuring the robustness of the project’s foundation by supplying Sonitec Crosshole Sonic Logging (CSL) testing tubes. These tubes were instrumental in conducting comprehensive structural integrity tests on the concrete piles of AVE Palencia-Santander USR Package 1 (Palencia – Palencia Norte) and Package 2 (Palencia Norte – Amusco).

    Crosshole Sonic Logging is a non-destructive testing method widely employed to assess the quality and integrity of concrete piles. It involves the use of sonic waves transmitted through the concrete between two access tubes, allowing engineers to evaluate the material’s properties and identify potential defects.

    Sonitec tubes are specially designed for Crosshole Sonic Logging, ensuring precise and reliable data collection during structural integrity tests. These tubes are embedded in the concrete piles during construction, providing access points for the sonic wave transmission.

    High-Speed Rail Access Channel in Valencia – Phase 1

    High Speed Rail Access Channel in Valencia – Phase 1

    The High-Speed Rail Access Channel project in Valencia represents a transformative initiative aimed at enhancing connectivity, bolstering economic growth, and fostering sustainable development within the region and beyond. As such, ensuring the reliability and longevity of its infrastructure components is paramount. This is where Dextra steps in with its cutting-edge solutions.

    The utilization of Sonitec tubes for crosshole sonic logging (CSL) testing exemplifies Dextra’s commitment to pioneering technologies that optimize construction processes and elevate industry standards. CSL testing is a non-destructive technique utilized to assess the integrity of deep foundation elements such as drilled shafts and bored piles. By transmitting ultrasonic pulses between pairs of probes embedded within concrete piles, CSL testing enables engineers to detect defects, voids, or anomalies that could compromise structural stability.

    In the context of the High-Speed Rail Access Channel project, Dextra’s provision of 60,000 linear meters of Sonitec tubes empowers construction teams with a robust methodology for evaluating the quality and integrity of concrete piles. This comprehensive testing approach not only meets regulatory requirements but also instills confidence in the durability and performance of the infrastructure, safeguarding against potential risks and ensuring compliance with stringent safety standards.

    The adoption of innovative solutions like Sonitec tubes underscores the evolution of construction practices towards greater efficiency, accuracy, and sustainability. By enabling early detection of potential issues and facilitating timely remediation measures, Dextra’s technology not only enhances project outcomes but also minimizes disruptions, reduces costs, and enhances overall project resilience.

    As the High-Speed Rail Access Channel in Valencia moves forward, Dextra’s contribution serves as a testament to the power of collaboration and innovation in shaping the future of infrastructure. By harnessing the latest technologies and best practices, Dextra and its partners are not only building bridges and tunnels but forging pathways to prosperity, connectivity, and sustainable development for generations to come.

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