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.

北ルソン高速道路プロジェクト (NLEx) は、フィリピンの首都マニラの北で行われている、一部高架化された大規模な道路プロジェクトです。このプロジェクトの目的は、ルソン島に強固な南北道路接続を提供することです。プロジェクトの総延長は80kmを超える。

このプロジェクトでは、Dextra が請負業者 Leighton Philippines を人気のあるプロジェクトでサポートしました。
バーテック ソリューション、東南アジアで一般的な鉄筋接合方法。

Bartec は、請負業者に鉄筋を接続する信頼性の高い方法を提供するため、アジアで非常に人気があります。 Bartec 鉄筋準備の独自の手順は、バーエンドの切断/拡大から始まり、ねじ切り前に鉄筋を均一にすることができるため、異なるロットの鉄筋間でも均一であり、時間の経過とともに信頼性が高くなります。

2015 年から 2017 年にかけて、オルス ルソン高速道路プロジェクトの高架部分、橋塔の上部で鉄筋カプラーが使用されました。カプラーにより、パイロンと最終的に道路を支えるプレキャスト梁の頭部との間の接続が可能になりました。

この用途だけでも、直径 D28 および D36 の 78,000 以上の鉄筋カプラーが使用されました。 Bartec がサポートする直径の範囲は、Dextra シリーズの中で最も幅広いものの 1 つです。詳細については、ダウンロード セクションで入手可能な技術データシートを参照してください。

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.

インドネシア公共事業省（MoPW）は、東カリマンタン州サマリンダのマハカム川を渡る新しい双橋プロジェクトの建設を委託した。マハカム IV プロジェクトには 2 つの独立した橋が含まれています。1,388 メートルの斜張橋は支間長 220 メートル、幅員 17 メートル、垂直距離 22 メートルで、長さ 740 メートルの主橋は幅員 14 メートル、垂直距離 25 メートルです。

Dextra はプロジェクトの初期段階からすでに関与しており、張力サポート システムを全体的な構造設計に統合するための BIM ツールを提供していました。

プロセスの最後に、さまざまな長さの 60 本以上の炭素鋼テンション ロッドが建設現場に届けられました。システムのフォークとターンバックルにより、現場の要件に合わせて長さを調整できます。

Dextra のテンション ロッド システムにより、構造物の引張荷重を最適に吸収できます。あらゆるプロジェクトの技術的および美的要件に適合するために、さまざまな強度グレードと表面仕上げが用意されています。

プロジェクトは完了し、2019 年に開通しました。

The National Highway 44 (NH 44) is the longest highway of India, spanning 3,745km from Srinagar to Kanyakumari.

As time moved forward, the cities close to the highway expanded at such a pace that the neighborhoods adjoining the highway mushroomed to very significant numbers.

As a result, the pedestrians and light vehicles along the two sides of the road often affect the flow and speed of long route heavy vehicles. It also poses a big risk for those local lighter vehicles and pedestrians.

To solve this problem, the Highway Authority of India proposed the road widening to be coupled with flyovers over the stretch wherein the highway is running through densely populated towns.

The 34-km long elevated stretch of highway in Nagpur-Hyderabad area is being constructed to improve the road network between Nagpur and the capital city of Hyderabad.

The authorities selected a segmental construction technology for the elevated bridges, and each heavy segment was casted in the quality-controlled environment of precast yards.

Considering the substantial size of these precast segments, it has been necessary to source easy-to-use lifting material, capable of sustaining high loads.

Dextra hot rolled fully threaded bars were the best fit to those requirements.

More than 100 sets of fully threaded (FT) post tensioning bars for lifting and launching of precast segments with launching girder have been supplied for this project, along with accessories such as end nuts and couplers.

Dextra FT Bar systems are frequently used for temporary applications such as heavy lifting and stitching of precast elements and anchoring of steel frame supports.

In the case of permanent applications, the FT Bars can be used for the connection of girders and piers in segmental bridge construction.

スルタン ハジ オマル アリ サイフディン橋としても知られるテンブロン橋は、ブルネイ北東部のブルネイ湾にあります。長さ 30 キロメートル、4 車線のこの橋は、世界最長の海上橋の 1 つです。

この橋はスンガイ ベサールとメンクバウを繋いでいます。これにより、通勤者はマレーシアを横断することなく両領土間の移動が可能となり、頻繁に渋滞する現在のルートにある4か所の入国審査場を回避できるようになる。

デキストラは、CSL (クロスホール音波検層) 試験方法を使用した基礎杭の完全性試験用に、34,000 リニア メートルのソニテック チューブを供給してこのプロジェクトに参加しました。

橋の建設は 2014 年に始まり、2020 年に正式に開通しました。

画像の出典: https://www.reduper.com/industry/traffic/bridge/sea-bridge/temburong-bridge/

Barapullah Elevated corridor is a major infrastructure project in India. The main purpose of this extension is to ease traffic congestion, as well as to provide a new express connectivity between Indira Gandhi International Airport and east Delhi.

Reinforcing the elevated road with PT bars

For the construction of this flyover, Dextra has been supplying its fully-threaded PT bars, as well as its well-known Bartec rebar splicing solution to the contractor L&T Construction.
The PT bar systems were applied in temporary applications of the construction project. Dextra fully-threaded post-tensioning bars are currently being used for lifting and launching the precast elements of the expressway’s elevated structures.

The Atlantic Bridge project, also called the Third Bridge Over the Canal, is being developed closed to the Atlantic Ocean entrance of the Panama Canal. This $600M project consists in construction of a 1-kilometer cable-stayed bridge, along with access viaducts on both sides and connections to the existing roads, as well as pedestrian and bicycle lanes. When archived, the bridge will allow vehicles to cross the Panama Canal even when the locks are in operation.

One of the World’s longest concrete cable-stayed bridge with Bartec

With its 530-meter central span and its vertical clearance of 75 meters above sea level allowing the passage of Post-Panamax ships, the four-lane Atlantic Bridge is one of the longest cable-stayed bridges in the World. It is also supported by two delta-shaped main pylons, reaching 212.5 meter height.
デクストラ ラテンアメリカ, with its main office in Panama City, was involved in supplying its rebar splicing solution Bartec for the reinforcement of the bridge’s concrete structure.

More than 350,000 Bartec couplers were delivered to the contractor VINCI Construction Grands Projets for the reinforcement of the bridge’s pile cages, pile caps and pylons for up to #14 (dia. 43 mm.) bars. Plus, three Dextra Bartec machine sets have been used to support the bar-end preparation on site.
Moreover, in order to avoid steel congestion in the heavily reinforced areas, more than 50,000 Dextra end anchors 頭付きバー are used in the bridge’s pile caps.

The Atlantic bridge is now in its final construction stage, and is planned to open in early 2019.

Phuoc Khanh bridge is a 4.7-kilometer cable-stayed bridge linking Ho Chi Minh City with Dong Nai. The bridge is part of the southern Vietnam’s longest highway, Ben Luc – Long Thanh Expressway, running through Long An province, Ho Chi Minh City and Dong Nai province.
When completed, the highway will connect the south-western region with the south-eastern region of the country, facilitating the transportation between the two parts of the country with improved traffic flow and larger lanes. The project aims to develop the socio-economic activities of this area.

橋の恒久的な用途向けの Dextra ポストテンションバー

For the construction of the Phuoc Khanh Bridge, Dextra is supplying its post-tensioning bar systems as permanent post-tensioning anchors.
Over 250 high performance fully-threaded post-tensioning bars and over 200 smooth bar systems were delivered to site. 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.

当社の製品についてさらに詳しく知りたい場合は、Dextra のサイトをご覧ください。 橋と高架橋のソリューション.