المهاتما غاندي سيتو (المعروف أيضًا باسم غاندي سيتو أو جانجا سيتو) هو جسر يمتد على نهر الجانج في بيهار، الهند، ويربط باتنا وهاجيبور. وهو ثالث أطول جسر نهري في الهند، ويبلغ طوله 5750 مترًا.

وشهد الجسر ازدحاما مروريا كبيرا في العقود الأخيرة نتيجة زيادة عدد السيارات التي تعبره، مما جعله يعمل بكامل طاقته ويثقل كاهل الهيكل. تطلب الأمر استبدال البنية الفوقية الخرسانية بإطار فولاذي.

شاركت Dextra في مشروع التجديد هذا من خلال توفير قارنات RepairGrip لتوصيل الرصيف القديم وأغطية الرصيف الجديدة.

تم أيضًا توفير قضبان ملولبة بالكامل لتطبيقات مختلفة أثناء هدم البنية الفوقية القديمة.

تم فتح الجانب الغربي الذي تم تجديده للجمهور في 31 يوليو 2020.

من المقرر أن يؤدي مشروع طريق Cross Tay Link Road في بيرث وكينروس، اسكتلندا، إلى إحداث تحول في وسائل النقل في المنطقة. إحدى السمات البارزة في هذا المسعى لبناء الطرق هو تضمين جسر ثلاثي الأبعاد فوق نهر تاي الرائع، وهو أطول نهر في اسكتلندا. ويهدف هذا المشروع إلى تعزيز الاتصال وتحسين كفاءة السفر للمقيمين والزوار على حد سواء.

ولضمان السلامة الهيكلية لركائز أساسات الجسر، قامت شركة Dextra بتوفير كمية قدرها 1,920 أنبوبًا، تصل إلى 11,136 مترًا طوليًا من Sonitec ST50. تم تصميم هذا المنتج المتخصص لاختبار سلامة الأكوام باستخدام طريقة Crosshole Sonic Logging (CSL). إنه يسهل تقييم جودة وموثوقية الركائز الأساسية، مما يضمن استقرار الجسر وسلامته على المدى الطويل.

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.

The Kanchpur, Meghna, and Gumti 2nd Bridges Construction and Existing Bridges Rehabilitation Project (KMG project) includes the construction of three new bridges on National Highway No. 1 (NH-1) across the Kanchpur, Meghna, and Gumti rivers, as well as the rehabilitation and renovation of existing bridges.

The new bridges have four lanes and are built beside older bridges with approach roads.

The objective of the project is to improve traffic conditions and transportation efficiency on the National Highway No.1 between Dhaka and Chittagong, contributing to Bangladesh’s long-term economic growth.

Dextra supplied thousands of Unitec couplers, ranging from diameter 12mm to 28mm to connect top slabs and piers.

Unitec is a bolted splicing system designed for the connection of two rebars which haven’t been previously prepared (no thread). It can be assembled on site with standard impact/pneumatic wrench.