カテゴリー: ニュース

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.

For precabricated cages used in foundation piling, Dextra recommends the use of 2 distinct solutions that will speed up and ease installation on site: optimal performance, higher productivity, safer operations.

Reinforcement >> Dextra coupler solutions are designed to allow the reconnection of prefabricated cages safely and in a minimum time.

CSL (Crosshole Sonic Logging) >> For Cross-Sonic Logging tubes (used in foundations testing), Sonitec will allow fast reconnection of the tubes without welding.

All Dextra employees present their deepest condolences for the loss of His Majesty King Bhumibol Adulyadej of Thailand. His majesty served Thailand tirelessly, and his dedication to the people of Thailand will be remembered. Our thoughts are with all Thai people and all our Thai colleagues during this difficult time.