श्रेणी: समाचार

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.

The पोस्ट टेंशनिंग बार सिस्टम, 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

The tower, whose construction started end of 2014, is expected to reach the height of 461 meters, a new height record in Vietnam. Landmark 81 will the 11th tallest tower building in the world.
For this project, Dextra is supplying its renowned बार्टेक solution to contractor Coteccons. बार्टेक rebar coupler solution has been approved by ARUP, owner’s representative consultant, and MACE International, structural consultant.

Read full project article

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

के सभी कार्यालयों के प्रबंधन एवं कर्मचारी थाईलैंड में डेक्सट्रा ग्रुप एक आधिकारिक समारोह में भाग लिया, डेक्सट्रा गुरुवार को "द दुसित महा प्रसार सिंहासन हॉल" में "महामहिम राजा भूमिबोल अदुल्यादेज, राजा राम IX के शाही अवशेष" (जिनका 13 अक्टूबर 2016 को निधन हो गया था) के अंतिम संस्कार की प्रार्थना का मेजबान था। 25 मई 2017 को 17:00 बजे।

इस आधिकारिक समारोह की अध्यक्षता समूह के अध्यक्ष और सीईओ श्री जीन-मैरी पिथॉन, प्रबंध निदेशक श्री फ्रेडरिक पैगनीज़ ने की। डेक्सट्रा उद्योग एवं परिवहन और श्री जीन-जैक्स ब्रौन, तकनीकी निदेशक डेक्सट्रा विनिर्माण, थाईलैंड में डेक्सट्रा सहयोगियों के 47 कर्मचारियों के एक प्रतिनिधिमंडल के साथ।

बैंकॉक में शोक समारोह थाईलैंड के लोगों को रॉयल पैलेस में महामहिम दिवंगत राजा को सम्मान देने की अनुमति देते रहेंगे, जब तक कि गुरुवार, 26 अक्टूबर 2017 को राष्ट्रीय दाह संस्कार नहीं हो जाता। इस दिन को थाईलैंड में राष्ट्रीय अवकाश घोषित किया गया था। .

नया चम्पलेन ब्रिज क्यूबेक (कनाडा) प्रांत में मॉन्ट्रियल के दक्षिण-पूर्व प्रवेश द्वार पर सेंट लॉरेंस नदी पर फैला 3 किमी लंबा पुल है।

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 रोलटेक मैकेनिकल रीबार स्प्लिसिंग system, in both Carbon Steel and Stainless Steel versions. रोलटेक 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 तनाव पट्टी 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.

रियाद मेट्रो रियाद, सऊदी अरब में निर्माणाधीन एक विशाल शहरी पारगमन प्रणाली परियोजना है। इस परियोजना में 176 किमी की कुल रेल लंबाई के लिए 6 पारगमन लाइनों के साथ निर्मित 85 स्टेशन होंगे। उम्मीद है कि 2018 में अपने उद्घाटन के समय यह प्रणाली प्रतिदिन कम से कम 1 मिलियन यात्रियों को सेवा प्रदान करेगी।

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

उत्खनन कार्य

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.

बेड़ा और ऊर्ध्वाधर कनेक्शन

बार्टेक रीबार कप्लर्स 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 यूनिटेक 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 तनाव पट्टियाँ 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).

इतनी बड़ी संरचनाओं के लिए, तनाव पट्टियाँ 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.