Río Subterráneo a Lomas tunnel is a 13.5-kilometer-long tunnel in Buenos Aires, Argentina, which will transport drinking water from the newly expanded General Belgrano Water Treatment Plant in Bernal’s Quilmes area to the city of Lomas de Zamora.

Being the main element of the Agua Sur system, a water supply project in Argentina, the tunnel is the country’s largest water infrastructure project in the last 40 years. This new system will provide 2.5 million inhabitants in the Buenos Aires metropolitan area’s southern region access to freshwater.

For this significant project, Dextra supplied soft eyes reinforced with GFRP (Glass Fiber Reinforced Polymer) bars to facilitate the penetration of Tunnel Boring Machines (TBM) through a reinforcement cage.

The project required two boring machines to be launched and received from shafts. The tunnel was excavated at an average depth of 25 meters, starting with a curve with a radius of about 400 meters, and moving along a largely straight alignment, with a maximum slope of +/- 2 percent.

The first launch shaft is composed by 4 circular sectors that interconnected with each other in the bottom area. The total length of the shaft is around 45 meters long, 12 meters wide, and 25 meters high.

The whole project is anticipated to take approximately 10 years to complete.

迪拜地铁是在阿拉伯联合酋长国迪拜运营的城市交通铁路系统。目前有两条线路投入运营，即红线和绿线。未来几年还计划增加更多线路。

对于红线的建设，Dextra 于 2005 年至 2010 年间与 JT Metro 的承包商（大林公司 – 鹿岛 – YapiMerkezi）一起参与，为各种包裹和车站提供众多 Dextra 解决方案。

对于车站建设，特别是基础工程（桩和周边 D 形墙），Dextra 提供了其 Bartec 钢筋拼接 解决方案。钢筋连接器用于桩 D 墙、柱和桥墩的垂直连接。钢筋连接器也用于将板重新连接到 D 墙上。总共为该项目供应了 800,000 个 Bartec 钢筋连接器，并由当地 Dextra 售后团队维护的几套 Bartec 设备提供支持。

对于小型维修应用， 维修夹具 还向没有准备螺纹且没有足够的可拼接长度的拼接钢筋提供了耦合器。

对于基础工程也是如此。 Dextra 提供了超过 60 公里的 Sonitec 声波管，使用 CSL 进行桩和墙的完整性测试。由于其推入式嘴系统，Sonitec 可以在现场轻松组装，从而提高团队生产力并避免将管子焊接在一起的繁琐任务。

最后，为了加速隧道掘进阶段并最大限度地减少退出/进入竖井和车站时的 TBM（隧道掘进机）时间，Dextra 设计了 GFRP软眼 并为众多车站包提供了超过 400 公里的复合钢筋。

Coimbra B-Portagem Mondego Metro project is part of the mass transit public transport system of Coimbra, Portugal. Dextra has played a significant role by providing Sonitec tubes for pile testing.

Dextra has supplied Sonitec tubes for testing a total of 67 piles ranging from 12 to 19 meters in depth. The tubes have been instrumental in conducting these tests with the Cross-Hole Sonic Logging (CSL) methodology.

The innovative push-fit connection system of Sonitec has greatly reduced labor time during installation. Thanks to this user-friendly system, the contractor has experienced smoother and more efficient pile testing processes. By eliminating the need for additional labor-intensive procedures, the contractor has saved valuable time and resources. It also ensures a secure and reliable connection between piles.

伦敦横贯铁路（2016年更名为伊丽莎白线）是欧洲最大的工程项目。它是伦敦交通局投资计划的重要组成部分，也是 50 年来对交通系统最大的扩建项目。

该项目包括一条横跨大伦敦、全长118公里的东西向铁路线，西起雷丁和希思罗，东至申菲尔德和阿比伍德。

自 2009 年以来，Dextra 已在 20 多个包裹上提供了超过 600,000 个 Griptec 连接，其中包括：

• 利物浦街
• 帕丁顿
• 邦德街
• 金丝雀码头
• 皇家橡树门户网站
• 布丁厂巷

Griptec 连接器已用于 D-Wall（垂直和水平连接）、柱和桩（垂直连接）。

Crossrail 的部分路段预计将逐步开始运营，预计于 2019 年 12 月全面竣工。

The Rio de Janeiro Line 4 is a subway line. It is part elevated and part underground (2 segments). The line has been planned to open for the 2016 Rio de Janeiro Summer Olympics.

Dextra has been involved since between 2013 and 2015 in the design, engineering and supply of four large FRP Soft Eyes for the station entry/exit points. Those Soft-Eyes were the first ever delivered in the South American continent.

在 D-Wall 施工之前，Dextra 设计 FRP 笼时会考虑 TBM 的尺寸、误差范围、土壤力和更多设计参数。

Thanks to the properties of FRP material, Tunnel Boring Machines cut through the D-Wall in a minimum time, saving time on schedule and ensuring the perfect condition of the TBM’s head. The time factor is especially important in humid environments such as Rio to limit the water entry into the station excavations.

On this project, Dextra also supplied Rolltec Rebar Couplers, used as vertical connections in the station diaphragm walls as vertical connectors to reconnect cages.

Couplers were also used horizontally to provide a reconnection point for slabs (at station level and at the surface) in the D-Walls.