महात्मा गांधी सेतु (जिसे गांधी सेतु या गंगा सेतु के नाम से भी जाना जाता है) एक पुल है जो भारत के बिहार में गंगा नदी तक फैला है और पटना और हाजीपुर को जोड़ता है। यह भारत का तीसरा सबसे लंबा नदी पुल है, जिसकी लंबाई 5,750 मीटर है।

हाल के दशकों में पुल को पार करने वाली कारों की संख्या में वृद्धि के परिणामस्वरूप पुल पर काफी यातायात की भीड़ का अनुभव हुआ था, जिसके कारण इसे क्षमता पर काम करना पड़ा और संरचना पर अत्यधिक भार पड़ा। इसके लिए कंक्रीट अधिरचना को स्टील ढांचे से बदलने की आवश्यकता थी।

डेक्सट्रा ने पुराने घाट और नए घाट कैप के कनेक्शन के लिए रिपेयरग्रिप कप्लर्स की आपूर्ति करके इस नवीकरण परियोजना में भाग लिया।

पुराने अधिरचना के विध्वंस के दौरान विभिन्न अनुप्रयोगों के लिए पूरी तरह से थ्रेडेड बार भी प्रदान किए गए थे।

पुनर्निर्मित पश्चिमी किनारा 31 जुलाई, 2020 को जनता के लिए खोल दिया गया।

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.

The Tan Vu – Lach Huyen Bridge is a 5.4-km long bridge located East of Hai Phong, in the North of Vietnam. The brige 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 infrastucture plan: the Tan Vu – Lach Huyen highway infrastructure project, which aims to develop Hai Phon 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 girders 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 bars can easily be cut, adjusted and re-used several times. Thanks to their continuous thread, the bars can be spliced at any points 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 contact our office in Bangkok.

The replacement of the Smith River Bridge at the South Fork Road, Crescent City (also named George Tryon Bridge) is a local infrastructure project initiated by the Federal Highway Administration (FHWA) and handed over contractor Flatiron West, Inc. The aim of the project is to replace an existing steel bridge, built in 1948.

For this project, Dextra supplied its Bartec rebar coupler solution. Bartec allows a convenient connection of rebars on large diameters from #4 to #18 (Imperial rebar sizes) and were used in columns and beams of the new replacement bridge. Bartec takes advantage of extended threads on rebars to splice them without the need of rotating any bar and without any extra further component: only a standard rebar coupler is required.

Additionally, Bartec Headed Bars were also supplied, replacing hook bars in congested reinforcement areas.

Bartec is a prequalified and authorized solution by CALTRANS (California Transportation Department) and has previously been tested and approved by the California Department of Transportation.

For more information about Dextra solutions available in the United States, please contact our North America office

The Bach Dang Bridge is the first all-Vietnamese designed and constructed mega infrastructural project located in northern Vietnam. The project is estimated to cost 7.3 trillion VND (approximately 312.2 million USD). The bridge 5.4-kilometer bridge spans over the historic Bach Dang River and is part of the Hanoi – Quang Ninh highway project. It also features 4 lanes of 28 meters wide, meticulously designed for speeds of up to 100km/hour traffic. The bridge and highway connection are intended to help shorten the distance from Hanoi and Quang Ninh from 175 km. to 125 km., as well as to cut travel times between the two localities in half.

The construction of the first multi-span cable-stayed bridge in Vietnam

The very first made-in-Vietnam multi-span cabled-stayed bridge features 3 H-pylons, representing Hanoi, Hai Phong, and Quang Ninh urban areas. These regions are now connected by the bridge to boost their economic growth. Bach Dang River has a historical significance as it is the site of the Battle of Bach Dang in 938CE, where rebel Vietnamese forces defeated and put an end to the Chinese imperial domination of Vietnam. Bach dang Bridge will only enhance further the strategic edge of the northern region.

Dextra post-tensioning bars for permanent applications of the bridge

For the construction of the Bach Dang Bridge, Dextra fully-threaded bars were applied to it as permanent post-tensioning anchors.
For this mega infrastructural project, Dextra supplied over 100 high performance post-tensioning bar systems. 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.

To learn more about our products, discover Dextra’s solutions for bridges and viaducts.

कांचपुर, मेघना और गुमटी द्वितीय पुल निर्माण और मौजूदा पुल पुनर्वास परियोजना (केएमजी परियोजना) में कांचपुर, मेघना और गुमटी नदियों के साथ-साथ राष्ट्रीय राजमार्ग संख्या 1 (एनएच -1) पर तीन नए पुलों का निर्माण शामिल है। मौजूदा पुलों का पुनर्वास और नवीनीकरण।

नए पुल चार लेन के हैं और पहुंच मार्गों के साथ पुराने पुलों के बगल में बनाए गए हैं।

परियोजना का उद्देश्य ढाका और चटगांव के बीच राष्ट्रीय राजमार्ग संख्या 1 पर यातायात की स्थिति और परिवहन दक्षता में सुधार करना है, जो बांग्लादेश के दीर्घकालिक आर्थिक विकास में योगदान देगा।

डेक्सट्रा ने शीर्ष स्लैब और पियर्स को जोड़ने के लिए 12 मिमी से 28 मिमी व्यास तक के हजारों यूनिटेक कप्लर्स की आपूर्ति की।

यूनिटेक एक बोल्टेड स्प्लिसिंग सिस्टम है जिसे दो सरियाओं के कनेक्शन के लिए डिज़ाइन किया गया है जो पहले तैयार नहीं किए गए हैं (कोई धागा नहीं)। इसे मानक प्रभाव/वायवीय रिंच के साथ साइट पर इकट्ठा किया जा सकता है।