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التصنيف: الطرق والجسور

فالنسيان بوسترينغ

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فالنسيان بوسترينغ

The Valenciennes Bowstring is a 2-kilometer-long bridge construction project that will connect the Saint-Saulve roundabout with the Bruay-sur-l’Escaut roundabout (North). It features a 76-meter-long bowstring bridge, a double-girder engineering structure, a pedestrian footbridge, and a wildlife passage.

Dextra, in collaboration with its local partner, Freyssinet, supplied a tension rod system as a hanger for the bowstring arch bridge on the bypass, ensuring the structure’s stability.

The tension rod system is renowned not only for its high performance but also for its customizable parameters, including design load, surface finish, and corrosion resistance, to meet all technical and aesthetic project requirements.

 

جسر بيليشاك

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جسر بيليشاك

The Pelješac Bridge construction aimed to connect the mainland to the Pelješac Peninsula, eliminating the need for ferry services and significantly reducing travel time between these regions. Dextra’s Fortec couplers played a pivotal role in connecting the pile reinforcement cages, ensuring the bridge’s structural stability.

A total of 85,000 Fortec couplers, in sizes ranging from 16-50 mm, and in Types A, B, and C, were used in the construction of the Pelješac Bridge. These couplers securely connected the pile reinforcement cages, ensuring the long-term stability and safety of this critical infrastructure.

طريق سيبو-كوردوفا السريع (CCLEX)، جسر ضخم في الفلبين

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Cebu-Cordova Link Expressway (CCLEX), a colossal bridge in the Philippines

Cebu–Cordova Link Expressway is one of the biggest infrastructure projects being undertaken in the Philippines. The project features a combination of a causeway, a gigantic cable-stayed bridge that will cross the navigable zone of the Cebu Strait, two viaducts, and four low-height bridges, as well as roadways and pedestrian walkways. The CCLEX Project aims to provide better transport facilities while reducing traffic congestion in the region, as well as to improve connectivity within Cebu City. It is also intended to support Cordova’s economic growth, as the expressway will position the city as the gateway for island tourism. Also known as the Third Mandaue–Mactan Bridge, the official groundbreaking of the toll bridge was in 2017, with the completion being scheduled for 2022.

جسر معلق بالكابلات يربط بين جزيرة سيبو وماكتان

After its completion, the Cebu-Cordova Expressway will link the Cebu mainland and Mactan Island through Cordova town. The 8.5 km-long toll bridge will feature two lanes that will serve up to 40,000 vehicles a day. The main bridge will be built with a 400-meter cable-stayed main span, with 60-meter navigation clearance, allowing ships to easily navigate through the expressway. The main bridge of the expressway will connect the Guadalupe River to Shell Island in Cordova, while its colossal viaducts will link it to the causeway and road networks to Mactan.

Dextra Bartec, reinforcing solutions for the construction of the Cebu-Cordova Bridge

The design and the construction of this megaproject are undertaken by the Cebu Link Joint Venture (CLJV). The CLJV is a joint-venture partnership between the Spain-based Acciona Construccion S.A. and the Philippines-based First Balfour Inc. and D.M. Consunji Inc. For the reinforcement of the colossal expressway’s foundations, the contractor has chosen Dextra’s well-known rebar splicing solution بارتيك. More than 35,000 units of Standard, Bridging, and Transition splices of steel grade 75, both in diameters 40 and 50, have been applied to the foundations’ piling cages as of July 2018. Moreover, to provide better end anchorages in congested areas, the CLJV opted for Dextra Bartec headed bars, which are also known as end anchors. Bartec end anchors are a convenient alternative to قضبان مدمن مخدرات, traditionally used for anchoring. For more information about rebar coupler availability in the Philippines, please contact our مكتب بانكوك.

نفق البوابة الغربية

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نفق البوابة الغربية

سيوفر مشروع نفق البوابة الغربية بديلاً حيويًا لجسر البوابة الغربية، مما يوفر معبرًا ثانيًا للنهر تشتد الحاجة إليه، ورحلات أسرع وأكثر أمانًا، وإزالة آلاف الشاحنات من الشوارع السكنية.

سيربط المشروع طريق West Gate السريع في Yarraville بميناء ملبورن وCityLink في Docklands عبر نفقين مزدوجين أسفل Yarraville وطريق Footscray المرتفع.

يشمل الطريق المرتفع 300 كومة ذات ارتفاعات متغيرة. تم صب الأكوام مسبقًا في أجزاء متعددة، بالقرب من الموقع. تقوم القضبان الرأسية بعد الشد بتجميع جميع أجزاء كل كومة معًا.

أصبحت طريقة بناء الأكوام هذه أكثر شيوعًا ولكنها تتطلب إعدادًا لا تشوبه شائبة، سواء من حيث بيان الطريقة أو تعريف المنتجات. كل التفاصيل ضرورية لنجاح التثبيت.

قامت شركة Dextra بتزويد شركة Freyssinet بأكثر من 1000 طن من أنظمة Freyssibar+، درجة 930/1080 ميجا باسكال، بأقطار اسمية 72 مم و55 مم، و7500 نقطة تثبيت للتطبيق الرأسي الدائم.

من خلال التعاون الوثيق بين DEXTRA والمكتب الخلفي لشركة Freyssinet (الإدارة الفنية وشركة منتجات Freyssinet) وموظفي موقع العمل (مشروع Freyssinet الرئيسي وFreyssinet Australia)، تم تكييف نظام الشد اللاحق بشكل مثالي مع احتياجات المشروع.

تم التحقق من صحة أقطار القضبان ودرجة الفولاذ وتصميم نقاط التثبيت من خلال اختبارات التأهيل وفقًا للمعايير الأسترالية، مما يوضح أداء النظام.

يمكن استخدام نظام القضبان هذا للشد اللاحق، والمثبتات الأرضية سابقة الإجهاد وأي تطبيق يتضمن قضبان ربط مؤقتة أو دائمة، أو رفع، أو تعليق، أو وصلات مسبقة الإجهاد، وما إلى ذلك.

بدأ إنشاء المشروع الرئيسي في يناير 2018.

طريق بار-بولجار السريع – أربعة جسور

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Bar-Boljare highway – Four viaducts

The Bar-Boljare Highway Project is a key infrastructure project led by the Ministry of Transportation and Maritime Affairs of Montenegro. It aims at improving the connections within the country and also between Montenegro and the rest of Europe to boost the country’s economy and tourism.

The project, built by China Road and Bridge Corporation (CRBC), embodies a new successful example of the cooperation between China and Eastern Europe. The new 2×2-way highway spans over 40 km. It is built in challenging terrains and yet satisfies both EU & Montenegro standards of road infrastructure. Its schedule is ambitious too: both roads and viaducts should be built in under 4 years. For the Bar-Boljare Highway Project, Dextra supplied its Bartec rebar coupler solution, used for the splicing of rebar in the piles of the four viaducts. Dextra Bartec splicing solution was chosen on that project for its compliance with ISO 15835 S2, which defines rebar couplers and reinforcements to be resistant to violent earthquake conditions. A total of 230,000 Bartec rebar couplers have been supplied to CRBC.

وصلة الدوحة (جسر جابر)

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وصلة الدوحة (جسر جابر)

 
Doha Link is a marine bridge project currently being built west of Kuwait City. It will ultimately be connected to the Main Causeway Across Kuwait Bay, another sea link project north of Kuwait City, which will make the Jaber Causeway sea link, one of the largest civil engineering projects ever built in the Middle East. The Doha Link stretches west of Kuwait City. It will ultimately solve traffic congestion and offer a direct itinerary thanks to a 7.7 km bridge structure built on shallow waters across the Kuwait Bay.  

Rebar splicing solution

شاركت Dextra في المرحلة الأولى من مشروع البناء لتوفير حل تقني لربط أقفاص حديد التسليح الكبيرة جدًا التي تصنع أكوام الأساس البرية والبحرية. رولتيك® couplers for large diameter rebar (32, 36, and 40mm) were used for the connection of cages and piers. Two grades of rebar are used across the project: ASTM Grade 60 and Grade 80. Rolltec is compatible by design with the higher ASTM Grade 80; the same couplers may be used on all applications, simplifying stock keeping. In addition, smaller diameter couplers for rebar 12mm and 16mm were used for the superstructure and the footing of light poles. One of the main advantages of Rolltec for remote projects is its very light machine setup. Rolltec is supported by a single one-man machine, offering a high level of productivity. Because the equipment is relatively small and the rebar preparation efforts were taking place simultaneously on both sides of the sea link construction, Dextra dispatched up to 4 machines on each side of the project to support the piling efforts.  

محلول أنبوب سونيتيك

With large piles of 2.5m diameter and 60m depth on average, it was compulsory for GS E&C to conduct sonic logging tests to examine the integrity of concrete piles, requiring the installation of 8 tubes in each cage. To achieve very long tube length and optimize cage preparation output, Dextra سونيتيك was the preferred choice of the contractor. Thanks to its lightweight and unique Push-Fit® connection feature. Sonitec provides enough flexibility during the cage construction, lifting, and assembly of the cage and removes the need for additional time-consuming welding operations.

إعادة تأهيل المهاتما غاندي سيتو

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إعادة تأهيل المهاتما غاندي سيتو

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.

Dextra participated in this renovation project by supplying RepairGrip couplers for the connection of old pier and new pier caps.

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.

جسر عبر خليج الكويت

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جسر عبر خليج الكويت (جسر جابر)

 

The Main Causeway across the Kuwait Bay is a 36-km-long project currently being built north of Kuwait City. It will ultimately be connected to Doha Link, another sea link project west of Kuwait City, which will connect the Jaber Causeway sea link, one of the largest civil engineering projects ever built in the Middle East.

The main causeway across Kuwait Bay stretches north of Kuwait City. It is expected that the link will greatly contribute to the development of the northern part of Kuwait. To achieve that, the Causeway will literally cut across Kuwait Bay with a 27-km sea link.

أبراج وعوارض الجسور

For the visible part of the sea link, Dextra worked with contractor Hyundai to offer high-tensile post-tensioning bar solutions.

دكسترا Smooth PT Bar تم استخدام الدرجة 835/1050 على طول الوصلة البحرية لربط العوارض مسبقة الصب معًا.

For part of the sea link, which is topped by a metallic cable-stayed structure. Higher performance bars in Grade 1050/1200 were used to offer a vertical anchoring point between the pylon and the reinforcement of the pile. PT Bars were delivered with a full corrosion protection accessory set by Dextra so that the bars will resist the marine conditions.

أنابيب التسجيل الصوتية ذات الفتحات المتقاطعة

For the concrete integrity testing of the onshore and offshore foundation piles, Dextra supplied around 400,000 linear meters of Sonitec tubes, which are easy to set up and reconnect without the need for welding, which significantly increases the productivity of the pile assemblies.

بمجرد تركيبها، تكون الأنابيب ثابتة في مكانها، مما يدعم دون مشكلة رفع القفص والتعامل معه.

عبر طريق تاي لينك

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عبر طريق تاي لينك

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.

تان فو - جسر لاش هوين

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تان فو - جسر لاش هوين

 

The Tan Vu–Lach Huyen Bridge is a 5.4-km-long bridge located east of Hai Phong, in the north of Vietnam. The bridge 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 infrastructure plan: the Tan Vu–Lach Huyen highway infrastructure project, which aims to develop Hai Phong 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 girder 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 can easily be cut, adjusted, and reused several times. Thanks to their continuous thread, the bars can be spliced at any point 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 our office in Bangkok.