The Cross Tay Link Road project in Perth and Kinross, Scotland, is set to transform transportation in the area. One of the notable features of this road construction endeavor is the inclusion of a three-span bridge over the magnificent River Tay, the longest river in Scotland. This project aims to enhance connectivity and improve travel efficiency for residents and visitors alike.

To ensure the structural integrity of the bridge’s foundation piles, Dextra provided a quantity of 1,920 tubes, amounting to 11,136 linear meters of Sonitec ST50. This specialized product is designed for pile integrity testing using the Crosshole Sonic Logging (CSL) method. It facilitates the evaluation of the quality and reliability of the foundation piles, ensuring the bridge’s long-term stability and safety.

The Tan Vu – Lach Huyen Bridge is a 5.4-km long bridge located East of Hai Phong, in the North of Vietnam. The brige is connecting the Hai Han district (East of Hai Phong), to the new port of Lach Huyen, located on the island district of Cat Hai. This will also allow the port of Lach Huyen to be directly connected to the Hai Phong/Hanoi highway, drastically reducing the transit time to Vietnam’s capital city.

The bridge project is part of a broader infrastucture plan: the Tan Vu – Lach Huyen highway infrastructure project, which aims to develop Hai Phon as a main transportation hub in the North of Vietnam.

For this bridge project, Dextra supplied two types of 后张法 systems:

• For the permanent reinforcement of precast girder segments, Dextra supplied PT smooth bar systems with threaded ends in sizes M39 and M49, grade 835/1030 and 930/1080. Dextra bar systems are used for the vertical post-tensioning of concrete segments.
• For the lifting and temporary fixing of the precast girders segments during the construction phase, Dextra supplied its Fully threaded bar systems in diameters 32 and 36, grade 1080/1230.

For all temporary applications such as lifting and fixing operations, Fully threaded PT bar systems are a convenient and economical solution as they bars can easily be cut, adjusted and re-used several times. Thanks to their continuous thread, the bars can be spliced at any points by the use of couplers or turnbuckles, which are also available from Dextra.

For more information and engineering support regarding Post Tensioning Systems in Vietnam, please contact contact our office in Bangkok.

The replacement of the Smith River Bridge at the South Fork Road, Crescent City (also named George Tryon Bridge) is a local infrastructure project initiated by the Federal Highway Administration (FHWA) and handed over contractor Flatiron West, Inc. The aim of the project is to replace an existing steel bridge, built in 1948.

For this project, Dextra supplied its Bartec rebar coupler solution. Bartec allows a convenient connection of rebars on large diameters from #4 to #18 (Imperial rebar sizes) and were used in columns and beams of the new replacement bridge. Bartec takes advantage of extended threads on rebars to splice them without the need of rotating any bar and without any extra further component: only a standard rebar coupler is required.

Additionally, Bartec Headed Bars were also supplied, replacing hook bars in congested reinforcement areas.

Bartec is a prequalified and authorized solution by CALTRANS (California Transportation Department) and has previously been tested and approved by the California Department of Transportation.

For more information about Dextra solutions available in the United States, please contact our North America office

The Bach Dang Bridge is the first all-Vietnamese designed and constructed mega infrastructural project located in northern Vietnam. The project is estimated to cost 7.3 trillion VND (approximately 312.2 million USD). The bridge 5.4-kilometer bridge spans over the historic Bach Dang River and is part of the Hanoi – Quang Ninh highway project. It also features 4 lanes of 28 meters wide, meticulously designed for speeds of up to 100km/hour traffic. The bridge and highway connection are intended to help shorten the distance from Hanoi and Quang Ninh from 175 km. to 125 km., as well as to cut travel times between the two localities in half.

The construction of the first multi-span cable-stayed bridge in Vietnam

The very first made-in-Vietnam multi-span cabled-stayed bridge features 3 H-pylons, representing Hanoi, Hai Phong, and Quang Ninh urban areas. These regions are now connected by the bridge to boost their economic growth. Bach Dang River has a historical significance as it is the site of the Battle of Bach Dang in 938CE, where rebel Vietnamese forces defeated and put an end to the Chinese imperial domination of Vietnam. Bach dang Bridge will only enhance further the strategic edge of the northern region.

用于桥梁永久应用的 Dextra 后张拉杆

For the construction of the Bach Dang Bridge, Dextra fully-threaded bars were applied to it as permanent post-tensioning anchors.
For this mega infrastructural project, Dextra supplied over 100 high performance post-tensioning bar systems. Also known as PT bars, they are specifically designed for post-tensioned applications. They can be corrosion-protected as is the case for the equipment supplied in the project. The corrosion protection is done in a controlled facility in Dextra’s factory, before being shipped to site.

要了解有关我们产品的更多信息，请了解 Dextra 桥梁和高架桥解决方案.

The Kanchpur, Meghna, and Gumti 2nd Bridges Construction and Existing Bridges Rehabilitation Project (KMG project) includes the construction of three new bridges on National Highway No. 1 (NH-1) across the Kanchpur, Meghna, and Gumti rivers, as well as the rehabilitation and renovation of existing bridges.

The new bridges have four lanes and are built beside older bridges with approach roads.

The objective of the project is to improve traffic conditions and transportation efficiency on the National Highway No.1 between Dhaka and Chittagong, contributing to Bangladesh’s long-term economic growth.

Dextra supplied thousands of Unitec couplers, ranging from diameter 12mm to 28mm to connect top slabs and piers.

Unitec is a bolted splicing system designed for the connection of two rebars which haven’t been previously prepared (no thread). It can be assembled on site with standard impact/pneumatic wrench.

北吕宋高速公路项目（NLEx）是一个大型道路项目，部分高架，位于菲律宾首都马尼拉北部。该项目的目标是在吕宋岛上提供一条稳健的南北公路连接。工程全长超过80公里。

对于这个项目，Dextra 为其广受欢迎的承包商 Leighton Philippinese 提供支持。
巴特克 解决方案，东南亚流行的钢筋拼接方法。

Bartec 在亚洲非常受欢迎，因为它为承包商提供了一种可靠的钢筋连接方式。Bartec 钢筋准备的独特顺序是从切割/扩大钢筋末端开始，可以在穿线前使钢筋均匀一致，使其随着时间的推移更加可靠，甚至在不同批次的钢筋之间也是如此。

2015 年至 2017 年间，吕宋岛高速公路项目的高架路段桥塔顶部使用了钢筋连接器。连接器允许塔架和预制梁头部之间的连接，最终支撑道路。

仅就该应用而言，就使用了超过 78,000 个直径为 D28 和 D36 的钢筋连接器。 Bartec 支持的直径范围是 Dextra 系列中最广泛的直径范围之一，有关更多信息，请参阅下载部分中提供的技术数据表。

Bezons Viaduct is part of the extension to the suburban train line E (Eole) of the Regional Express Network, an hybrid transit system in Paris, France, serving the capital and its suburbs.

The viaduct connects the train line E to the existing network with a 96m-long bowstring-arch bridge that allows the lines to pass over the existing railway line on ground.

A proper concrete tensioning system was required to ensure the stability of the 2,000 tons structure: Dextra and its Tension Rods stepped in for that purpose.

The key success factor of this project, both in terms of design and customer care, was the strong collaboration between Dextra and its local partner Freyssinet.

Photo credit: https://www.lemoniteur.fr/article/bezons-le-bow-string-du-saut-de-mouton-d-eole-est-en-place.2044730#! ©CHRISTOPHE RECOURA/FOORESO

The Zuari bridge is a 640-meter long 8-lane cable-stayed bridge laying across the massive river Zuari in Goa. The project also includes 450-meter long elevated approaches with only 2 pillars, along with a 12-kilometer detour. The total value of the project is estimated at $227M.

This new bridge will solve the long commute problems across the two banks of the river. Additionally, with the wider span than the old one, this shall also take care of the growing vehicular traffic which its predecessor built some 30 years back.

With the new bridge, the Public Work Department (PWD) aims to improve road safety and ease traffic flow. Two towers and viewing galleries will also be added for tourism purposes. Being started in 2016, the project is planned to be finished in 2019.

Parallel-threaded rebar couplers for the bridge’s pile cages and pylons

For this massive project in Goa, Dextra has been supplying its popular parallel-threaded rebar splicing solutions Bartec for Fe 500 and Fe 600 Grade steel. More than 110K Bartec couplers are getting installed in Pile cages and Pile caps. This is one of the iconic bridge project, may be one of its kind, with Fe 600 grade steel to be a part of Pile caps and Fe 500 grade steel in piles up to 48 meter deep. Pylon is 103 meter in height and designed with Fe 600 grade steel as well.

Bartec is a full performance mechanical rebar couplers, with no reduction of cross-section area of the bar thanks to their parallel-threads. This characteristic makes the rebar connections a strong point of the structure, and can also simplify the project’s inventory: one type of coupler for both standard and position applications.

The bar-end preparation is also supported by 3 high-productivity machines which prepare each bar in sequence: cutting, cold forging and threading.

Dextra post-tensioning bars for precast elements and segment castings

In addition to Bartec couplers, for the bridge’s precast segments, the contractors also opted for Dextra post-tensioning bar systems. PT bars helps the project’s stakeholders carry out the erection of precast segments and the casting of the segments in time, and in a quality controlled manner.

More than 500 sets of pt bars were delivered to the project as of November 2018. Dextra has made supplies to Dilip Buildcon for Yard applications and Launching.

Also, for phase III of the project, Dextra has made supplies to NRS for PT bars and accessories.

印度尼西亚公共工程部 (MoPW) 委托建造一座新的双桥项目，横跨东加里曼丹省三马林达的 Mahakam 河。 Mahakam IV项目包括两座独立桥：斜拉桥全长1388m，跨长220m，宽度17m，垂直净空22m；主桥长740m，宽度14m，垂直净空25m。

Dextra 已参与该项目的早期阶段，提供 BIM 工具，以便将张力支撑系统集成到整体结构设计中。

最终，60多根不同长度的碳钢拉杆运抵施工现场。该系统的叉子和螺丝扣可以调整长度以满足现场要求。

Dextra 的拉杆系统可以最佳地吸收结构的拉力载荷。有多种不同的强度等级和表面光洁度可供选择，以满足所有项目的技术和美观要求。

该项目已于2019年竣工通车。

44 号国道 (NH 44) 是印度最长的高速公路，从斯利那加到科尼亚库马里，全长 3,745 公里。

随着时间的推移，高速公路附近的城市迅速扩张，高速公路沿线社区的数量也迅速增加。

因此，道路两侧的行人和轻型车辆往往会影响长路线重型车辆的流量和速度。这也给当地的轻型车辆和行人带来了很大的风险。

为了解决这个问题，印度公路管理局提议拓宽道路，并在高速公路穿过人口稠密城镇的路段上设置立交桥。

纳格浦尔-海得拉巴地区正在修建的 34 公里长的高架公路段旨在改善纳格浦尔和首都海得拉巴之间的公路网络。

当局为高架桥选择了节段施工技术，每个重型节段都是在预制场的质量控制环境中浇筑的。

考虑到这些预制部件的巨大尺寸，有必要采购易于使用、能够承受高负载的起重材料。

Dextra 热轧全螺纹棒材最适合这些要求。

已为该项目提供了 100 多套全螺纹 (FT) 后张拉杆，用于通过下水梁提升和下水预制节段，以及端螺母和耦合器等配件。

Dextra FT Bar 系统经常用于临时应用，例如预制构件的重型起重和缝合以及钢框架支撑的锚固。

在永久应用的情况下，FT 钢筋可用于分段桥梁施工中梁和桥墩的连接。