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标签： Holding Down Bar Systems​

西门隧道

发表于 通过 Sir Gwi

西门隧道

西门隧道项目将为西门大桥提供一个重要的替代方案，提供急需的第二条河流交叉口、更快、更安全的旅程，并从住宅街道上拆除数千辆卡车。

该项目将通过亚拉维尔地下的双隧道和高架 Footscray 路，将亚拉维尔的西门高速公路与墨尔本港和港区的 CityLink 连接起来。

高架路包括300个不同高度的桩。这些桩已在靠近工地的地方分多个部分预制。垂直后张拉杆将每根桩的所有段组装在一起。

这种桩的施工方法越来越常见，但无论是在方法说明还是产品定义方面都需要完美的准备。每个细节都是安装成功的基础。

Dextra 向 Freyssinet 提供了超过 1,000 吨的 Freyssibar+ 系统，等级为 930/1080 MPa，公称直径为 72mm 和 55mm，以及用于垂直永久应用的 7,500 个锚具。

通过 DEXTRA、Freyssinet 后台（技术部门和 Freyssinet 产品公司）和工作现场工作人员（Freyssinet 主要项目和 Freyssinet 澳大利亚）之间的密切合作，后张法系统已完美适应该项目的需求。

钢筋直径、钢级和锚固设计已根据澳大利亚标准通过资格测试进行验证，展示了系统的性能。

该杆系统可用于后张法、预应力地锚以及任何涉及临时或永久拉杆、提升、悬挂、预应力拼接等的应用。

重大项目于2018年1月开工建设。

多哈连线（贾比尔堤道）

发表于 通过 Sir Gwi

多哈连线（贾比尔堤道）

 
Doha Link is a marine bridge project currently being built west of Kuwait City. It will ultimately be connected to the Main Causeway Across Kuwait Bay, another sea link project north of Kuwait City, which will make the Jaber Causeway sea link, one of the largest civil engineering projects ever built in the Middle East. The Doha Link stretches west of Kuwait City. It will ultimately solve traffic congestion and offer a direct itinerary thanks to a 7.7 km bridge structure built on shallow waters across the Kuwait Bay.  

Rebar 连接方案

Dextra参与了该建设项目的早期阶段，为陆上和海上基础桩的超大型钢筋笼的拼接提供技术解决方案。 Rolltec® couplers for large diameter rebar (32, 36, and 40mm) were used for the connection of cages and piers. Two grades of rebar are used across the project: ASTM Grade 60 and Grade 80. Rolltec is compatible by design with the higher ASTM Grade 80; the same couplers may be used on all applications, simplifying stock keeping. In addition, smaller diameter couplers for rebar 12mm and 16mm were used for the superstructure and the footing of light poles. One of the main advantages of Rolltec for remote projects is its very light machine setup. Rolltec is supported by a single one-man machine, offering a high level of productivity. Because the equipment is relatively small and the rebar preparation efforts were taking place simultaneously on both sides of the sea link construction, Dextra dispatched up to 4 machines on each side of the project to support the 桩 efforts.  

Sonitec 管解决方案

With large piles of 2.5m diameter and 60m depth on average, it was compulsory for GS E&C to conduct sonic logging tests to examine the integrity of concrete piles, requiring the installation of 8 tubes in each cage. To achieve very long tube length and optimize cage preparation output, Dextra 索尼泰克 was the preferred choice of the contractor. Thanks to its lightweight and unique Push-Fit® connection feature. Sonitec provides enough flexibility during the cage construction, lifting, and assembly of the cage and removes the need for additional time-consuming welding operations.

横跨科威特湾的堤道

发表于 通过 Sir Gwi

横跨科威特湾的堤道（贾比尔堤道）

 

The Main Causeway across the Kuwait Bay is a 36-km-long project currently being built north of Kuwait City. It will ultimately be connected to Doha Link, another sea link project west of Kuwait City, which will connect the Jaber Causeway sea link, one of the largest civil engineering projects ever built in the Middle East.

The main causeway across Kuwait Bay stretches north of Kuwait City. It is expected that the link will greatly contribute to the development of the northern part of Kuwait. To achieve that, the Causeway will literally cut across Kuwait Bay with a 27-km sea link.

桥塔和梁

For the visible part of the sea link, Dextra worked with contractor Hyundai to offer high-tensile post-tensioning bar solutions.

右旋糖苷 Smooth PT Bar 整个海上连接线均使用 835/1050 级材料将预制梁连接在一起。

For part of the sea link, which is topped by a metallic cable-stayed structure. Higher performance bars in Grade 1050/1200 were used to offer a vertical anchoring point between the pylon and the reinforcement of the pile. PT Bars were delivered with a full corrosion protection accessory set by Dextra so that the bars will resist the marine conditions.

跨孔声波测井管

For the concrete integrity testing of the onshore and offshore foundation piles, Dextra supplied around 400,000 linear meters of Sonitec tubes, which are easy to set up and reconnect without the need for welding, which significantly increases the productivity of the pile assemblies.

安装后，管子牢固就位，支撑笼子的提升和搬运不会出现问题。