多哈地铁 Msheireb 站

发表于 11 月 4, 20223 月 12, 2025 通过 Sir Gwi

多哈地铁 Msheireb 站

Msheireb 站是多哈地铁的主要换乘站。它位于多哈市中心，连接所有三条线路（红线、绿线和金线），并将成为 2022 年 FIFA 世界杯体育场馆的门户

Msheireb 站将成为世界上规模最大的地铁站之一。

软眼 for TBMs

For this major project, Dextra engineered and supplied between 2013 and 2015 8 large ASTEC GFRP Soft-Eyes, of a diameter of 8 meters each. Soft Eyes are cages of GFRP rebar, positioned into the D-Walls in-between steel segments. GFRP Soft-Eyes allow Tunnel Boring Machines (TBMs) to go through in a minimum time as the bars can be easily crushed by the tunnel machine.

回系锚

To anchor the massive d-walls and prevent any soil displacement during excavation works, Dextra also supplied its ASTEC 主动锚 (AAA). Those innovative post-tensioned GFRP-based anchors, have the benefits of being cut by the Tunnel Boring Machines or standard excavation equipment. Because it can be easily cut, it doesn’t need to be removed from the ground, even when used for temporary applications.

就 Msheireb 站而言，甚至在 Soft-Eye 中心安装了多筋锚（该项目中每个锚 10 个）来锚定 D-Wall。这些锚在隧道突破过程中也被切断（在下面的视频中可见）。车站内总共安装了 150 个锚。

新加坡地铁市区线

发表于 11 月 3, 20223 月 14, 2024 通过 Sir Gwi

新加坡地铁市区线

地铁市区线是一条全长 44 公里的全地下地铁线，连接新加坡主岛的西北和东部地区。它拥有 36 个车站，最终每天应该运送超过 50 万名乘客。

该线路的建设是分段进行的。部分生产线已经投入运营。计划于 2024 年全面竣工。

自 2008 年至 2011 年间，Dextra 一直参与设计、工程并向各承包商供应用于多站包的大型 FRP Soft Eyes。

Dextra 为 DTL 系列设计并生产了总共 19 个 Soft-Eyes (2)。软眼是车站 D 墙的一部分，位于每个车站的车站入口/出口处。

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。

凭借 FRP 材料的特性，隧道掘进机可以在最短的时间内切穿 D 形墙，从而节省了时间并确保了 TBM 机头的完美状态。

作为 Soft Eyes 的补充，Dextra 还为各个地铁站提供了 Bartec 钢筋连接器。

在 D 墙中，钢筋连接器 (2) 主要用作执行第二阶段钢筋连接的方式。挖掘完成后，使用连接器将启动杆连接到 D-Wall 以建造板。

(1) 降低笼子之前，D-Wall 中的 Soft Eye FRP 加固。

(2)用于站板连接的待定钢筋连接器。

钦奈地铁

发表于 11 月 3, 20223 月 12, 2025 通过 Sir Gwi

钦奈地铁

The Chennai Metro is an urban transport system in the city of Chennai, a large and fast-developing city in the south of India. The system comprises four lines, partly underground and partly elevated, and a total of 42 stations. Construction started in 2009, with the first line opening to the public in 2015. The total planned length of the system exceeds 45.1 km.

Underground Stations

For this large construction project, Dextra was involved between 2011 and 2015 in the design, engineering, and supply of 61 FRP Soft Eyes for station entry/exit points as well as TBM insertion/extraction shafts.

Thanks to the properties of FRP material, Tunnel Boring Machines cut through the D-Wall in minimal time, saving time in the schedule and ensuring the perfect condition of the TBM’s head.

Elevated Segments

As a complement to Soft-Eyes for underground parts of the lines, Dextra also supplied Post-Tensioning Bar Systems for permanent applications.

The PT systems connect piles and precast segments of the elevated viaduct (shear key and hold-down applications). Each bar system, composed of high-tensile performance bars, plates, and nuts, is post-tensioned to provide seismic resistance.

For each of the 1,000 sets used on the Chennai Metro, Dextra also supplied the corrosion accessories necessary for this type of permanent application.

D-Walls

Finally, 350,000 Bartec couplers were also used vertically and horizontally in the station D-Walls.

Horizontal connections are performed with couplers left pending. Reconnection is done once the station is excavated, with second-phase rebar being reconnected to start the slabs.

标签：雅达软眼