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私のデクストラ

カテゴリー: 道路と橋

バレンシエンヌ弦

投稿日: アーティスト: Sir Gwi

バレンシエンヌ弦

The Valenciennes Bowstring is a 2-kilometer-long bridge construction project that will connect the Saint-Saulve roundabout with the Bruay-sur-l’Escaut roundabout (North). It features a 76-meter-long bowstring bridge, a double-girder engineering structure, a pedestrian footbridge, and a wildlife passage.

Dextra, in collaboration with its local partner, Freyssinet, supplied a tension rod system as a hanger for the bowstring arch bridge on the bypass, ensuring the structure’s stability.

The tension rod system is renowned not only for its high performance but also for its customizable parameters, including design load, surface finish, and corrosion resistance, to meet all technical and aesthetic project requirements.

 

ペリェシャツ橋

投稿日: アーティスト: Sir Gwi

ペリェシャツ橋

The Pelješac Bridge construction aimed to connect the mainland to the Pelješac Peninsula, eliminating the need for ferry services and significantly reducing travel time between these regions. Dextra’s Fortec couplers played a pivotal role in connecting the pile reinforcement cages, ensuring the bridge’s structural stability.

A total of 85,000 Fortec couplers, in sizes ranging from 16-50 mm, and in Types A, B, and C, were used in the construction of the Pelješac Bridge. These couplers securely connected the pile reinforcement cages, ensuring the long-term stability and safety of this critical infrastructure.

セブ-コルドバリンク高速道路 (CCLEX)、フィリピンの巨大な橋

投稿日: アーティスト: Sir Gwi

Cebu-Cordova Link Expressway (CCLEX), a colossal bridge in the Philippines

Cebu–Cordova Link Expressway is one of the biggest infrastructure projects being undertaken in the Philippines. The project features a combination of a causeway, a gigantic cable-stayed bridge that will cross the navigable zone of the Cebu Strait, two viaducts, and four low-height bridges, as well as roadways and pedestrian walkways. The CCLEX Project aims to provide better transport facilities while reducing traffic congestion in the region, as well as to improve connectivity within Cebu City. It is also intended to support Cordova’s economic growth, as the expressway will position the city as the gateway for island tourism. Also known as the Third Mandaue–Mactan Bridge, the official groundbreaking of the toll bridge was in 2017, with the completion being scheduled for 2022.

セブ島とマクタン島を結ぶ斜張橋

After its completion, the Cebu-Cordova Expressway will link the Cebu mainland and Mactan Island through Cordova town. The 8.5 km-long toll bridge will feature two lanes that will serve up to 40,000 vehicles a day. The main bridge will be built with a 400-meter cable-stayed main span, with 60-meter navigation clearance, allowing ships to easily navigate through the expressway. The main bridge of the expressway will connect the Guadalupe River to Shell Island in Cordova, while its colossal viaducts will link it to the causeway and road networks to Mactan.

Dextra Bartec, reinforcing solutions for the construction of the Cebu-Cordova Bridge

The design and the construction of this megaproject are undertaken by the Cebu Link Joint Venture (CLJV). The CLJV is a joint-venture partnership between the Spain-based Acciona Construccion S.A. and the Philippines-based First Balfour Inc. and D.M. Consunji Inc. For the reinforcement of the colossal expressway’s foundations, the contractor has chosen Dextra’s well-known rebar splicing solution バーテック. More than 35,000 units of Standard, Bridging, and Transition splices of steel grade 75, both in diameters 40 and 50, have been applied to the foundations’ piling cages as of July 2018. Moreover, to provide better end anchorages in congested areas, the CLJV opted for Dextra Bartec headed bars, which are also known as end anchors. Bartec end anchors are a convenient alternative to フックバー, traditionally used for anchoring. For more information about rebar coupler availability in the Philippines, please contact our バンコク事務所.

西門トンネル

投稿日: アーティスト: Sir Gwi

西門トンネル

ウエストゲート トンネル プロジェクトは、ウエスト ゲート ブリッジに代わる重要な橋を提供し、切望されていた 2 番目の川渡り、より迅速で安全な移動を実現し、住宅街から数千台のトラックを排除します。

このプロジェクトでは、ヤラビルのウェストゲート・フリーウェイとメルボルン港およびドックランズのシティリンクを、ヤラビル地下のツイントンネルと高架のフッツクレイ・ロードを介して接続する。

高架道路には、高さを変えられる 300 個の杭が含まれています。杭は現場に近い複数のセグメントにプレキャストされています。垂直ポストテンションバーは、各杭のすべてのセグメントを組み立てます。

この杭の建設方法はますます一般的になってきていますが、方法の説明と製品の定義の両方の点で、完璧な準備が必要です。それぞれの詳細は、インストールを成功させるための基礎となります。

Dextra は、呼び径 72mm および 55mm のグレード 930/1080 MPa の 1,000 トンを超える Freyssibar+ システムと、垂直永久用途向けの 7,500 個の固定具を Freyssinet に供給しました。

DEXTRA、フレシネットのバックオフィス (技術部門およびフレシネット製品会社)、および現場スタッフ (フレシネットの主要プロジェクトおよびフレシネット オーストラリア) 間の緊密な協力により、ポストテンション システムはプロジェクトのニーズに完全に適合しました。

バーの直径、鋼種、固定具の設計はオーストラリア規格に準拠した認定テストを通じて検証されており、システムの性能が実証されています。

このバー システムは、ポスト テンション、プレストレスト グラウンド アンカー、および一時的または恒久的なタイロッド、吊り上げ、サスペンション、プレストレスト スプライスなどを含むあらゆる用途に使用できます。

2018年1月に大規模プロジェクトの建設が開始されました。

バル・ボルジャーレ高速道路 – 4 本の高架橋

投稿日: アーティスト: Sir Gwi

Bar-Boljare highway – Four viaducts

The Bar-Boljare Highway Project is a key infrastructure project led by the Ministry of Transportation and Maritime Affairs of Montenegro. It aims at improving the connections within the country and also between Montenegro and the rest of Europe to boost the country’s economy and tourism.

The project, built by China Road and Bridge Corporation (CRBC), embodies a new successful example of the cooperation between China and Eastern Europe. The new 2×2-way highway spans over 40 km. It is built in challenging terrains and yet satisfies both EU & Montenegro standards of road infrastructure. Its schedule is ambitious too: both roads and viaducts should be built in under 4 years. For the Bar-Boljare Highway Project, Dextra supplied its Bartec rebar coupler solution, used for the splicing of rebar in the piles of the four viaducts. Dextra Bartec splicing solution was chosen on that project for its compliance with ISO 15835 S2, which defines rebar couplers and reinforcements to be resistant to violent earthquake conditions. A total of 230,000 Bartec rebar couplers have been supplied to CRBC.

ドーハ リンク (ジャバー コーズウェイ)

投稿日: アーティスト: Sir Gwi

ドーハ リンク (ジャバー コーズウェイ)

 
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 splicing solution

デクストラは、陸上および海上の基礎杭を作る非常に大きな鉄筋ケージの接合に関する技術的ソリューションを提供するために、建設プロジェクトの初期段階に関与してきました。 ロールテック® 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 piling efforts.  

ソニテックチューブソリューション

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 ソニテック 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.

マハトマ・ガンジー・セトゥ・リハビリテーション

投稿日: アーティスト: Sir Gwi

マハトマ・ガンジー・セトゥ・リハビリテーション

マハトマ ガンジー セトゥ (ガンジー セトゥまたはガンガー セトゥとしても知られる) は、インドのビハール州のガンジス川に架かり、パトナとハジプールを繋ぐ橋です。これはインドで 3 番目に長い川橋で、長さは 5,750 メートルです。

この橋は、ここ数十年、通行する車の増加により、かなりの交通渋滞に見舞われ、橋の容量が限界に達して橋梁構造に過大な負担がかかっていました。そのため、コンクリートの上部構造を鉄骨構造に取り替える必要がありました。

Dextra participated in this renovation project by supplying RepairGrip couplers for the connection of old pier and new pier caps.

古い上部構造の解体中に、さまざまな用途に完全にねじ切りされたバーも提供されました。

改修された西側側面は、2020 年 7 月 31 日に一般公開されました。

クウェート湾を渡る土手道

投稿日: アーティスト: Sir Gwi

クウェート湾を渡る土手道 (ジャバー土手道)

 

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.

橋の鉄塔と橋桁

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

デクストラ Smooth PT Bar グレード 835/1050 は、プレキャスト桁を接続するためにシーリンク全体に使用されました。

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.

クロスホールソニックロギングチューブ

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.

設置すると、チューブは所定の位置にしっかりと固定され、ケージの持ち上げや取り扱いを問題なくサポートします。

クロステイリンクロード

投稿日: アーティスト: Sir Gwi

クロステイリンクロード

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.

タンヴー - ラクフイン橋

投稿日: アーティスト: Sir Gwi

タンヴー - ラクフイン橋

 

The Tan Vu–Lach Huyen Bridge is a 5.4-km-long bridge located east of Hai Phong, in the north of Vietnam. The bridge 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 infrastructure plan: the Tan Vu–Lach Huyen highway infrastructure project, which aims to develop Hai Phong as a main transportation hub in the North of Vietnam.

For this bridge project, Dextra supplied two types of post-tensioning 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 girder 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 can easily be cut, adjusted, and reused several times. Thanks to their continuous thread, the bars can be spliced at any point 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 our office in Bangkok.