Nova ponte da baía de São Francisco

Postado em Novembro 5, 2022Março 7, 2025 por Sir Gwi

Nova ponte da baía de São Francisco

A New Bay Bridge foi um grande projeto de engenharia civil realizado entre 2002 e 2013. O objetivo do projeto era substituir dois segmentos da Bay Bridge que eram vulneráveis a terremotos por uma nova estrutura projetada para suportar forças sísmicas.

Neste projeto, a Dextra esteve envolvida em dois segmentos da renovação: a abordagem à Bay Bridge no lado de São Francisco e o segmento leste da Ilha Yerba Buena até Oakland.

A Dextra forneceu seu Bartec® Sistemas de barras com cabeça para este projeto. As barras com cabeça apresentam um disco de ancoragem montado na extremidade de uma barra de aço previamente preparada para o sistema Bartec®.

O uso de Barras com cabeça Oferece uma alternativa inteligente e compacta aos ganchos longos de vergalhões em áreas com muita armadura. Ao contrário das barras de gancho, as barras com cabeça são fáceis de instalar, pois as âncoras de extremidade podem ser simplesmente aparafusadas na armadura posteriormente, após a instalação.

Para a aproximação à Bay Bridge em São Francisco e ao segmento leste da Ilha Yerba Buena, as barras com cabeça Bartec® foram usadas para reforço de cisalhamento nas fundações das colunas, bem como nas dobradiças da ponte.

A solução Bartec® Headed Bars é aprovada pelo Caltrans (Departamento de Transporte da Califórnia) para todos os tamanhos de barras imperiais de #3 a #18 e também é certificada pelo ICC-ES.

EPR de Flamanville

Postado em Novembro 5, 2022Março 27, 2025 por Sir Gwi

EPR de Flamanville

Flamanville é o primeiro reator construído após o projeto EPR de nova geração (Reator Pressurizado Europeu), após um projeto chinês 100%. Terá capacidade de 1,3 GWe quando entrar em serviço em 2019.

A Dextra está presente no local desde o início das obras em 2008 e até 2015.

Para este projeto desafiador, a Dextra forneceu suas barras de reforço Griptec solução de emenda por meio de seus parceiros fabricantes locais. A preparação da armadura foi auxiliada por uma máquina adicional instalada no local.

Griptec é o vergalhão preferido solução de emenda da indústria nuclear graças ao seu nível de desempenho único e a um processo de teste automático que testa sistematicamente todas as conexões produzidas como parte de seu ciclo padrão: uma garantia de que 100% das conexões apresentam desempenho acima dos requisitos do projeto.

Mais de 800.000 conexões Griptec foram usadas no projeto, incluindo 400.000 montagens de posição, permitindo a conexão de barras de grande diâmetro sem girá-las. As conexões Griptec foram instaladas no prédio do reator e Concha APC, assim como edifícios auxiliares.

Em particular, o Griptec tem sido usado para conexões de grandes painéis pré-fabricados.

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Painéis de quatro lados com Griptec mangas femininas e pinos de ligação

Graças a ela Conjuntos de pontes, painéis quadrados poderia ser reconectado em painéis de quatro lados, ao mesmo tempo em que lidava com possível desalinhamento que ocorre ao levantar a gaiola.

Ponte Hanói Nhật Tân

Postado em Novembro 5, 2022Março 7, 2025 por Sir Gwi

Ponte Hanói Nhật Tân (Ponte da Amizade Vietnã – Japão)

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 Bartec® 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

Postado em Novembro 5, 2022Março 26, 2025 por Sir Gwi

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 Bartec couplers for critical structural connections, including rafts, columns to beams, slabs to paredes centrais, paredes centrais, 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.

Fonte das imagens: https://www.archdaily.com/931860/ciel-the-worlds-tallest-hotel-is-under-construction-in-dubai-marina, https://propsearch.ae/dubai/ciel- torre

Orbit by Auro Realty, Hyderabad, India

Postado em Novembro 5, 2022Março 3, 2025 por Sir Gwi

Orbit by Auro Realty, Hyderabad, India

O edifício comercial mais alto da Índia construído com tecnologia pré-moldada

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 Groutec 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—Groutec 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.

Fonte das imagens: https://www.aurobindorealty.com/portfolio/orbit/

Viaduto Del Manglar de Cartagena

Postado em Novembro 5, 2022Março 7, 2025 por Sir Gwi

Viaduto Del Manglar de Cartagena

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.

Para este projeto na Colômbia, a Dextra tem fornecido à empreiteira Rizzani de Eccher Rolltec® acopladores de vergalhão e Barras com cabeça. 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.

Para mais informações sobre as soluções Dextra na Colômbia, entre em contato com nosso escritório regional da América Latina.

Two IFC (International Finance Centre), Hong Kong

Postado em Novembro 5, 2022Março 3, 2025 por Sir Gwi

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 Bartec 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.

Bartec 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.

Ponte estaiada do rio Mandovi

Postado em Novembro 5, 2022Março 7, 2025 por Sir Gwi

Ponte estaiada do rio Mandovi

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:

Barras de suspensão
Protensão vertical
Barras de protensão horizontais
Barras de elevação
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

King Abdullah Financial District, Saudi Arabia

Postado em Novembro 5, 2022Março 27, 2025 por Sir Gwi

King Abdullah Financial District, Saudi Arabia

The King Abdullah Financial District (KAFD) is a multipurpose business and residential complex located in Riyadh, Saudi Arabia. The district consists of more than 50 towers and is expected to accommodate a working population of around 12,000 people.

Dextra Middle East, based in Dubai, has been involved since 2009 in supplying several building packages to Saudi Bin Ladin Group, the main contractor for the project.

Foundation Piles

To provide vertical connections in foundation piles, Dextra supplied its popular Bartec rebar coupler solution—the #1 rebar solução de emenda in the Middle East—through its fabrication partners.

In addition to Bartec couplers, Dextra also supplied Unitec couplers, which were used for the continuation of bars protruding from the foundation piles. Unitec offers a flexible solution for contractors, as it does not require prior bar-end preparation. It only requires an impact wrench, making it easy to operate, especially on remote construction sites.

Jangada e Colunas

Bartec couplers were also used for horizontal connections in the thick foundation rafts and vertical connections in the protruding columns.

Core Wall-to-Beam Formulários

In the building superstructure, Dextra Bartec couplers were used to provide horizontal connections from the core wall, enabling the insertion of second-phase starter bars needed to create the beam reforço.

Ponte Nova Champlain

Postado em Novembro 5, 2022Março 7, 2025 por Sir Gwi

Ponte Nova Champlain

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 Rolltec® 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.

Categoria: Projetos