مجموعة دكسترا | اتصالات موثوقة

جسر الخليج الجديد في سان فرانسيسكو

جسر الخليج الجديد في سان فرانسيسكو

The New Bay Bridge was a large civil engineering project undertaken between 2002 and 2013. The aim of the project was to replace two segments of the Bay Bridge that were vulnerable to earthquakes with a new structure designed to withstand seismic forces.

For this project, Dextra was involved in two segments of the renovation: the approach to the Bay Bridge on the San Francisco side and the eastern segment from Yerba Buena Island to Oakland.

Dextra supplied its بارتيك® Headed Bar systems for this project. Headed Bars feature an anchor disc mounted on the end of a rebar previously prepared for the Bartec® system.

استخدام قضبان الرأس provides a smart and compact alternative to long rebar hooks in areas where reinforcement is particularly congested. Unlike hook bars, Headed Bars are easy to install, as end anchors can simply be screwed onto the reinforcement at a later stage, after the reinforcement is in place.

For the approach to the Bay Bridge in San Francisco and the eastern segment of Yerba Buena Island, Bartec® Headed Bars were used for shear reinforcement in the column foundations as well as in the bridge hinges.

The Bartec® Headed Bars solution is approved by Caltrans (the California Department of Transportation) for all imperial bar sizes #3 to #18 and is also certified by the ICC-ES.

فلامانفيل إي بي آر

فلامانفيل إي بي آر

فلامانفيل هو أول مفاعل تم بناؤه وفقًا لتصميم الجيل الجديد من EPR (المفاعل الأوروبي المضغوط)، بعد التصميم الصيني 100%. وستبلغ سعته 1.3 جيجاوات عند دخول الخدمة في عام 2019.

تتواجد شركة دكسترا في الموقع منذ بداية أعمال البناء في عام 2008 وحتى عام 2015.

بالنسبة لهذا المشروع الصعب، قامت شركة Dextra بتوريد قضبان التسليح Griptec الخاصة بها محلول الوصل من خلال شركائها من المصنّعين المحليين. وتمّ دعم تجهيز قضبان التسليح بآلة إضافية وُضعت في الموقع.

Griptec هو حديد التسليح المفضل محلول الوصل بفضل مستوى أدائه الفريد وعملية الاختبار التلقائية التي تختبر بشكل منهجي جميع الوصلات المنتجة كجزء من دورتها القياسية: ضمان أن 100% من الوصلات تعمل فوق متطلبات المشروع.

تم استخدام أكثر من 800 ألف وصلة Griptec في المشروع، بما في ذلك 400 ألف وصلة تجميعات المواضعمما يسمح بتوصيل قضبان حديد التسليح كبيرة القطر دون الحاجة إلى تدويرها. تم تركيب وصلات Griptec على مبنى المفاعل و قذيفة APC، إلى جانب المباني المساعدة.

على وجه الخصوص، تم استخدام Griptec لتوصيلات الألواح الجاهزة الكبيرة.

Four sided panels with Griptec <span class=أكمام نسائية و مسامير الجسر” العرض = “303″ الارتفاع = “198″ />

ألواح رباعية الجوانب مع Griptec أكمام نسائية و مسامير الجسر

بفضلها تجميعات الجسر, ألواح مربعة يمكن إعادة توصيلها على ألواح ذات أربعة جوانب مع مراعاة عدم المحاذاة المحتمل حدوثه عند رفع القفص.

جسر هانوي نهات تان

جسر هانوي نهات تان (فيتنام – جسر الصداقة الياباني)

The Nhat Tan Bridge is an impressive cable-stayed bridge spanning the Red River, located north of Hanoi. The total length of the project is 8.9 km, including the 3.75 km main bridge.

The bridge serves as a new gateway to Hanoi, significantly reducing travel time to Noi Bai International Airport, the second busiest airport in Vietnam by passenger volume.

The bridge was inaugurated by the Ministry of Transport of Vietnam and opened to the public on January 4, 2015. It has since been renamed the “Vietnam – Japan Friendship Bridge.”

Dextra has been involved in the Nhat Tan Bridge since the early stages of the project, supplying the widely used بارتيك® rebar couplers, the leading rebar splicing solution in Vietnam. Bartec® connections were used in various parts of the project, including approaches, foundation piles, pile caps, and bridge segments.

Bartec® couplers offer a versatile rebar splicing solution, as the same standard coupler can be used for both standard connections (where the rebar rotates into the coupler) and position connections (where only the coupler rotates, useful when rebar rotation is not possible). Dextra supplied more than 130,000 connections in total for this project, enabling the lifting of heavy elements.

For the temporary operations of lifting and securing the precast girder segments, Dextra also supplied 36 tons of high-tensile PT bars.

Ciel Tower Dubai, UAE

Ciel Tower Dubai, UAE

Ciel Tower is an 82-storey high-rise building under development in Dubai Marina. With a total height of 365 meters, it is set to become the world’s tallest hotel-only building upon its completion, scheduled for 2025.

Located in the heart of Dubai Marina, the tower is near popular attractions such as Marina Walk and Marina Mall, a major shopping and entertainment complex. It will feature 1,042 luxury suites, along with a rooftop hosting a pool bar, a restaurant, and an observation deck.

The architectural design is heavily inspired by the concept of vertical living, maximizing panoramic views of Palm Jumeirah, Bluewaters Island, Dubai Harbour, and the Arabian Gulf.

Dextra has supplied 180,000 بارتيك couplers for critical structural connections, including rafts, columns to beams, slabs to الجدران الأساسية, الجدران الأساسية, and starter bars, enhancing the building’s strength and stability.

Ciel Tower is set to become an iconic landmark, further solidifying Dubai’s reputation as one of the world’s premier tourist destinations.

مصدر الصور: https://www.archdaily.com/931860/ciel-the-worlds-tallest-hotel-is-under-construction-in-dubai-marina، https://propsearch.ae/dubai/ciel- برج

Orbit by Auro Realty, Hyderabad, India

Orbit by Auro Realty, Hyderabad, India

أطول مبنى تجاري في الهند تم بناؤه بتقنية الخرسانة مسبقة الصب

Orbit is a 25-storey office building strategically located in the heart of Hyderabad’s IT Hub, constructed using precast technology. It is one of the tallest commercial buildings in India built with this method.

Constructed by Aurobindo Realty, the Orbit building was honored with the “Best Office Architecture India” award by the International Property Awards – Asia Pacific Property Awards 2018.

Designed with precast technology, the building is also proposed for LEED v4 Gold Certification from USGBC, demonstrating its commitment to environmental sustainability and energy efficiency.

Dextra’s جروتيك couplers played a key role in precast element connections. Approximately 60,000 couplers were installed in precast elements at the precast factory before being transported to the construction site for grout connections.

With the growing demand for modular buildings worldwide—especially during the COVID-19 pandemic, where healthcare and quarantine facilities were urgently needed—جروتيك couplers have become a widely adopted solution. They are designed and manufactured in compliance with Eurocode 2, BS 8110, ACI 318, IBC, and AASHTO standards.

مصدر الصور: https://www.aurobindorealty.com/portfolio/orbit/

قرطاجنة فيادوكتو ديل مانجلار

قرطاجنة فيادوكتو ديل مانجلار

The Viaducto del Manglar project is a 5.3 km bridge spanning the Ciénaga de la Virgen (swamp), north of Cartagena, Colombia. The project aims to reduce traffic congestion when exiting the city in the Zona Norte (Northern Area).

The viaduct, scheduled to open in 2018, is part of a longer highway project linking Cartagena with Barranquilla.

بالنسبة لهذا المشروع في كولومبيا، قامت Dextra بتزويد المقاول Rizzani de Eccher رولتيك® مقرنات حديد التسليح و قضبان الرأس. Rebar preparation operations have been carried out by Dextra’s distributor in Colombia.

Headed Bars were used in precast caissons, installed beneath the bridge girders, to reduce steel congestion in the heavily reinforced steel cages.

لمزيد من المعلومات حول حلول Dextra في كولومبيا، يرجى الاتصال بنا المكتب الإقليمي لأمريكا اللاتينية.

Copyright pictures: Consesion Costera

Two IFC (International Finance Centre), Hong Kong

Two IFC (International Finance Centre), Hong Kong

Two IFC is a landmark skyscraper in Hong Kong, located in West Kowloon. The 412-meter-high commercial building features 88 floors and is the second tallest building in Hong Kong, following the ICC Tower.

Vertical reinforcement is a crucial structural feature for buildings of this height. Consultant ARUP and contractors E-Man-Sanfield JV selected Dextra for the splicing of reinforcement throughout the building.

For this project, Dextra supplied more than 200,000 بارتيك rebar couplers, which were primarily used for vertical connections, especially in all columns.

Additionally, rebar couplers provided connection points for second-phase rebar reconnection, typically between columns and slabs and columns and beams. To achieve this, rebar couplers were aligned horizontally and cast in concrete, allowing for reconnection at a later stage by screwing in the second-phase rebar.

بارتيك is the preferred reinforcement splicing solution for contractors in Hong Kong, as it is recommended in the Hong Kong Building Material List. Dextra also operates its own rebar threading workshop in Hong Kong, providing rebar preparation services for its customers.

جسر نهر ماندوفي المعلق

جسر نهر ماندوفي المعلق

The third bridge over the Mandovi River in Goa is an iconic structure that connects Panaji in Tiswadi Taluka and Porvorim in Bardez Taluka. Positioned between the two existing bridges, it was designed to ease traffic congestion along this route. The bridge was officially inaugurated on January 27, 2019.

As one of the longest cable-stayed bridges in India, the four-lane, 21m-wide, 620m-long continuous span Mandovi River Cable-Stayed Bridge adds architectural beauty to Panaji. Standing 70m above sea level, its central concrete pylons are spaced at 150m and are supported by 88 cables arranged in a single-plane harp-type configuration.

Dextra supplied 1,170 sets of fully-threaded post-tensioning bar systems in diameters of 25, 32, 40, 50, and 75mm, with a grade of 830/1030, for various applications, including:

  • قضبان شماعات
  • الإجهاد العمودي
  • قضبان الإجهاد الأفقية
  • رفع القضبان
  • Anchoring the pier head segment to the pier cap
  • Anchoring the front support to the pier cap
  • Anchoring the front cantilever support to the pier cap
  • Anchoring the middle, rear, and auxiliary supports

مركز الملك عبد الله المالي، المملكة العربية السعودية

مركز الملك عبد الله المالي، المملكة العربية السعودية

مركز الملك عبدالله المالي (KAFD) هو مجمع تجاري وسكني متعدد الأغراض يقع في الرياض، المملكة العربية السعودية. يتألف المركز من أكثر من 50 برجًا، ومن المتوقع أن يستوعب حوالي 12,000 شخص.

شاركت شركة دكسترا الشرق الأوسط، ومقرها دبي، منذ عام 2009 في توريد العديد من حزم البناء لمجموعة بن لادن السعودية، المقاول الرئيسي للمشروع.

أكوام الأساس

لتوفير اتصالات رأسية في أكوام الأساس، قامت شركة ديكسترا بتزويد منتجاتها الشهيرة بارتيك حل وصلة حديد التسليح - حديد التسليح #1 محلول الوصل في الشرق الأوسط - من خلال شركائها في التصنيع.

بالإضافة إلى بارتيك وصلات، كما قامت شركة دكسترا بتوريدها أيضًا يونيتيك وصلات كانت تستخدم لاستمرار القضبان البارزة من أكوام الأساس. يونيتيك يُقدّم حلاً مرنًا للمقاولين، إذ لا يتطلب تحضيرًا مسبقًا لطرفه. فهو يتطلب فقط مفتاح ربط صدمي، مما يُسهّل تشغيله، خاصةً في مواقع البناء النائية.

الطوافة والأعمدة

بارتيك كما تم استخدام وصلات للتوصيلات الأفقية في أسطح الأساس السميكة والتوصيلات الرأسية في الأعمدة البارزة.

النواة من الحائط إلى العارضة التطبيقات

في البنية الفوقية للمبنى، دكستر بارتيك تم استخدام وصلات لتوفير اتصالات أفقية من الجدار الأساسي، مما يتيح إدخال قضبان بدء المرحلة الثانية اللازمة لإنشاء الشعاع تعزيز.

جسر شامبلين الجديد

جسر شامبلين الجديد

The New Champlain Bridge is a 3 km-long bridge spanning the Saint Lawrence River at the southeastern entrance of Montreal, Quebec, Canada. As one of the busiest bridges in Canada, it plays a crucial economic role for the city, serving as a key route to the United States, located 60 km south.

 

Replacing the Older Champlain Bridge

The New Champlain Bridge is replacing the existing Champlain Bridge, which was commissioned in June 1962. The older structure began showing signs of corrosion in 1994. After several temporary safety measures were implemented to keep the bridge operational, a replacement project was initiated in 2007. For a time, both bridges will stand side by side until the older structure is fully dismantled, with most of its materials planned for recycling.

 

A Focus on Corrosion Resistance

The New Champlain Bridge is designed to last at least 125 years and accommodate 50 million vehicle crossings per year. Given the corrosive environment caused by frequent road de-icing, corrosion resistance was a top priority. Duplex stainless steel rebar was installed in critical areas to enhance durability.

For this project, Dextra recommended using Duplex Stainless Steel Rolltec couplers and anchors. This specialized version of our رولتيك® system replaces standard couplers and anchors with an improved duplex steel alternative, offering superior corrosion resistance.

The Rolltec® solution is well-suited to the Canadian market and is approved by the Quebec Ministry of Transport. With a single-operator threading machine and 30-second threading cycles, it provides high productivity, making it ideal for high-labor-cost markets like Canada.

More than 10,000 Stainless Rolltec® couplers were supplied for this project, primarily for bridge spans. These couplers were used to splice large-diameter reinforcement bars, ranging from 35M (#11) to 55M (#18)—the largest size available in our Rolltec® range.

Additionally, about 10,000 Rolltec® stainless steel end anchors were delivered for sizes up to 55M (#18). Rolltec® Headed Bars use the same threading system as the couplers, simplifying production and installation.