Hanoi Nhật Tân Bridge

Posted on November 5, 2022March 14, 2024 by Sir Gwi

Hanoi Nhật Tân Bridge (Vietnam – Japan Friendship Bridge)

The Nhat Than Bridge is an impressive cable-stayed bridge spanning over the Red River and located North of Hanoi. The total length of the project is 8.9 km, including the actual3.75 km bridge.

The bridge is the new gateway to Hanoi as it greatly reduces the transport time to Hanoi Noi Ban Airport, the second busiest airport of Vietnam in passengers.

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

Dextra has been involved on the Nhat Tan bridge since the early stage of the project by supplying the popular Bartec rebar couplers, the main rebar splicing solution in Vietnam. Bartec connections were used in various part of the project: approaches, foundation piles, pile caps and approaches.

Bartec couplers make a convenient rebar splicing solution as the same standard coupler can be used for standard connection (rotating rebar into coupler) and position connection (rotating only coupler, when it is impossible to rotate rebar). Dextra supplied more than 130,000 connections in total for this project for the lifting of heavy elements.

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

My Home GRAVA Hyderabad

Posted on November 5, 2022March 14, 2024 by Sir Gwi

My Home GRAVA Hyderabad

In the heart of Hyderabad, India, a towering testament to architectural excellence and engineering innovation is taking shape – the My Home GRAVA project. Comprising eight 43-storey towers, this mega project stands as a symbol of modern living and technological advancement in the construction industry. One of the key contributors to the success of this colossal venture is Dextra, a global leader in providing innovative solutions for the construction sector.

Optimizing Design and Construction:

My Home Construction, the visionary developer behind GRAVA, has left no stone unturned in ensuring the optimization of design and construction methodologies. From the early stages of planning, the focus has been on delivering a project that not only redefines luxury living but also sets new benchmarks for efficiency and sustainability in construction.

Dextra Couplers: A Structural Revolution:

At the core of GRAVA’s construction success is the implementation of 570,000 Groutec couplers and more than 70,000 Bartec couplers for all structural connections within the concrete frame. These couplers play a pivotal role in ensuring the structural integrity of the buildings, providing a secure and efficient connection between the precast elements.

The Groutec and Bartec couplers are known for their high-performance capabilities, making them ideal for large-scale and complex projects like GRAVA. These couplers eliminate the need for traditional lapped splicing, offering a faster and more reliable alternative for connecting and reinforcing concrete structures and precast concrete elements. This not only accelerates the construction process but also enhances the overall durability and safety of the structure.

As the My Home GRAVA project continues to rise and reshape the skyline of Hyderabad, it stands as a testament to the successful collaboration between visionary developers and innovative construction solution providers. Groutec and Bartec couplers have played a crucial role in the seamless construction of the eight 43-storey towers, contributing to the project’s efficiency, strength, and durability.

The project not only promises a luxurious living experience but also sets a new standard for construction excellence in India, with Dextra’s contribution leaving an indelible mark on its success.

Beijing CCTV Tower

Posted on November 5, 2022March 14, 2024 by Sir Gwi

Beijing CCTV Tower

CCTV Headquarter building is a landmark tower located in Central Beijing Business district. The tower is hosting the operations of China Central Television and has been since its completion in 2012 one of the architectural landmarks of the Chinese capital.

For that project, Dextra was involved in providing contractor China State Construction Engineering Corporation with an anchoring solution for the columns that will ultimately support the building “bridge” complex architecture.

The anchoring of the structure is a challenge on the CCTC building given the building’s height (234 meter) and its distinctive complex shape. Furthermore, the building is actually located in an area of seismic activity, and must therefore been built with to resist additional loads.

Dextra supplied high tensile PT bar Systems in large diameters. The Post-Tensioned system aim tolock themetallic structure located at the foot of the megacolumns, and anchor them into a heavily reinforced mat.

The large PT systems (bars and plates) came with additional corrosion protection accessories (tubes and injection ports), allowing for grout sealing.

Causeway across Kuwait Bay

Posted on November 4, 2022February 6, 2024 by Sir Gwi

Causeway across Kuwait Bay (Jaber Causeway)

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 connected make together the Jaber Causeway sea link, one of the largest civil engineering project 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 Northern part of Kuwait. To achieve that, the Causeway will literally cut across Kuwait Bay with a 27-km sea link.

Bridge pylons and girders

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

Dextra Smooth PT Bar Grade 835/1050s were used all along the sea link for the connection of the precast girders together.

For part of the sea link which is topped by 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 resists the marine conditions.

Crosshole Sonic Logging tubes

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 need of welding, which significantly increases the productivity of the pile assemblies.

Once installed, the tubes are firmly in place, supporting without issue the cage lifting and handling.

Tag: Post Tensioning Bar Systems