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。

淡布隆大桥，又称苏丹哈吉奥马尔阿里赛义夫丁大桥，位于该国东北部的文莱湾。全长30公里，四车道，是世界上最长的跨海大桥之一。

这座桥连接大港和Mengkubau。它允许通勤者在两个地区之间旅行，而无需穿越马来西亚，避开了当前路线上经常拥挤的四个移民检查站。

Dextra 参与了该项目，提供了 34,000 延米的 Sonitec 管，用于使用 CSL（跨孔声波测井）测试方法对基桩进行完整性测试。

该桥于2014年开工建设，2020年正式通车。

图片来源：https://www.reduper.com/industry/traffic/bridge/sea-bridge/temburong-bridge/

巴拉普拉高架走廊是印度重大基础设施项目。此次扩建的主要目的是缓解交通拥堵，并在英迪拉·甘地国际机场和德里东部之间提供新的快速连接。

用PT筋加固高架路

为了建造这座立交桥，Dextra 一直向承包商 L&T Construction 提供其全螺纹 PT 钢筋以及著名的 Bartec 钢筋拼接解决方案。
PT 杆系统应用于该建设项目的临时应用。 Dextra 全螺纹后张拉杆目前用于提升和推出高速公路高架结构的预制构件。

大西洋大桥项目，也称为运河第三大桥，正在靠近巴拿马运河大西洋入口处开发。该$600M项目包括建设一座1公里长的斜拉桥，以及两侧的通道高架桥和与现有道路的连接，以及人行道和自行车道。归档后，即使船闸处于运行状态，该桥也将允许车辆穿越巴拿马运河。

Bartec 建造的世界上最长的混凝土斜拉桥之一

四车道大西洋大桥的中心跨度为 530 米，垂直净空为海拔 75 米，允许超巴拿马型船舶通过，是世界上最长的斜拉桥之一。它还由两个三角形的主塔支撑，高达212.5米。
右旋拉丁美洲，其主要办事处位于巴拿马城，参与供应其 钢筋拼接解决方案 Bartec 用于加固桥梁的混凝土结构。

超过 350,000 个 Bartec 耦合器已交付给承包商 VINCI Construction Grands Projets，用于加固桥梁的桩笼、桩帽和塔架，钢筋数量最多为 #14（直径 43 毫米）。此外，还使用了三台 Dextra Bartec 机器组来支持现场的棒端准备工作。
此外，为了避免重钢筋区域的钢筋堵塞，超过50,000个Dextra端锚 有头酒吧 用于桥梁的桩帽。

大西洋大桥目前正处于最后的施工阶段，计划于 2019 年初开放。