カテゴリー: ニュース

Post Tensioning Bar systems are highly customizable and versatile solutions allowing for multiple applications in bridge/viaduct construction.

Dextra has recently supplied customized PT bar systems for the reinforcement of precast girder segments used on the Bang Pa In – Saraburi – Nakhon Ratchasima highway in the North-East of Bangkok.

の ポストテンションバーシステム, made of hot rolled deformed high-tensile bars (FT bars) Ø36mm, allow for the vertical reinforcement of the precast segments, with up to 14 sets per girder element.

Each bar will be jacked and put under the required tension from the top of each element while on the ground. After that the girder is lifted and installed in its final position.

Permanent corrosion protection will be achieved by filling a galvanized duct around the bar with grout.

More about Fully Threaded Bar Systems

2014年末に建設が開始されたこのタワーは、ベトナムの新記録となる高さ461メートルに達すると予想されている。ランドマーク 81 は世界で 11 番目に高いタワービルになります。
このプロジェクトのために、Dextra は有名な バーテック 請負業者コテッコンへのソリューション。 バーテック 鉄筋カプラー ソリューションは、オーナーの代表コンサルタントである ARUP と構造コンサルタントである MACE International によって承認されています。

プロジェクトの記事全文を読む

Dextra recently released an update of all its rebar coupler tools to upgrade to latest version of Tekla.

New Tekla version now allows clear visualization of threaded bar ends, allowing to see the extended threads for first phase rebar for example.

Tekla attributes are available to download from Dextra website.

Download Tekla attributes

Management and employees from all offices of Dextra Group in Thailand attended an official ceremony, Dextra being host of Funeral prayers to “His Majesty The King Bhumibol Adulyadej, King Rama IX’s Royal remain” (who had passed away on the 13th October 2016), at “The Dusit Maha Prasart Throne Hall”, on Thursday the 25th of May 2017 at 17:00 hrs.

This official ceremony was presided by Mr. Jean-Marie Pithon, Group Chairman and CEO, Mr. Frederic Pagniez, Managing Director of Dextra Industry & Transport and Mr. Jean-Jacques Braun, Technical Director of デクストラ・マニュファクチャリング, accompanied by a delegation of 47 employees from Dextra affiliates in Thailand.

The mourning ceremonies in Bangkok will continue to allow the people of Thailand to pay their respects to His Majesty The Late King at the Royal Palace, until the national cremation takes place on Thursday, the 26th October 2017. This day was proclaimed national holiday in Thailand.

新しいシャンプレーン橋は、ケベック州 (カナダ) のモントリオールの南東入口にあるセントローレンス川にかかる長さ 3 km の橋です。

The Champlain Bridge is one of the busiest bridges in Canada and plays an important economical role for its city as it is part of the main itinerary to the United States, accessible 60-km South.

For this project, Dextra is supplying its Rolltec メカニカル鉄筋スプライシング system, in both Carbon Steel and Stainless Steel versions. ロールテック is a certified system by the Department of Transportation of the State of Quebec.

Read more on full project page

This year again, Dextra lined up 2 teams of 12 runners at Peak24 race in Hong Kong! The teams were featuring a mix of Dextra Guangzhou and Dextra Hong Kong staff, pushing together their limits for the good cause and in an incredible atmosphere!

Peak 24 Race is a charity race aiming to raise awareness about slavery and human trafficking problem in the world, and especially in Asia. Funds raised by Peak24 will be donated to the 24 Hour Race, a Hong Kong-founded & international youth charity which inspires students in five countries to join the movement to eradicate modern slavery. The profits raised from us will directly benefit the expansion of the 24 Hour Race movement.

In the United Arab Emirates, Dextra recently delivered a new Oil and Gas project. Dextra tension rods have been used for the support of structure supporting very large liquid gas tanks.

For this application, Dextra engineered, manufactured and delivered bar assemblies based on Carbon Steel bars Gr.355 of diameter Ø120mm. Each テンションバー system is composed of two segments spliced at the lower half of the assembly. The system is mounted onto gusset plates thanks to their fork ends, which can be connected to the structure in just a few minutes by simply sliding in a pin in the middle of the fork.

For length adjustment and tightening, turnbuckes, positionned at the lower half of each tendon, are simply rotated to bring bar segments closer to each other and tension the overall system.

リヤド メトロは、サウジアラビアのリヤドで建設中の大規模な都市交通システム プロジェクトです。このプロジェクトでは、6 つの交通路線に沿って 85 の駅が建設され、鉄道の総延長は 176 km になります。このシステムは、2018 年の開業時には少なくとも 1 日当たり 100 万人の乗客にサービスを提供すると予想されています。

For this large infrastructure project, Dextra Middle East has been involved on various stations and packages.

発掘作業

Before proceeding with general construction works, during early excavation phase, it is required to anchor retaining walls back into the stable ground in order to prevent any wall displacement. This will allow to keep excavating in a safe environment.

For that purpose, Dextra supplied steel ground anchors installed through retaining wall. Each system is based on a high-tensile fully threaded bar, coming with nut and plate, and grouted to provide bonding with the soil.

ラフトと垂直接続

Bartec 鉄筋カプラー were supplied for the works in the stations. Couplers were used for slabs, column and wall connections. A typicall application on this project is to cast rebar couplers in the concrete with reinforcement, and then proceed with second phase bar connection at a later stage.

Unitec bolted couplers can have also been use on various parts of the project. Typically ユニテック is used when overlap is planned but lapping length appear to be too short to perform a safe splice. In that case Unitec provides a convenient and full performance connection.

Dextra supplied contractor Italian-Thai with テンションバー to support the roof structure of the expansion of BITEC, a leading exhibition and convention center in central Bangkok. Installation has successfully be completed in 2016!

In total, Dextra delivered 298 assemblies in various diameters, each composed of multiple bars connected with couplers and turnbuckles and anchored to the structure with fork ends, with total assembly lengths in several cases exceeding 50 meters long (average 33 meters).

このような大きな構造物の場合、 テンションバー offer a number of advantages compared to other “tensioning” solutions: lower elongation under loads, lower post tensioning forces required, better resistance to corrosion, reduced long terms relaxation and reduced maintenance and surveillance costs.