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Tag: Smooth PT bar systems​

Hanoi Nhật Tân Bridge

Posted on by Sir Gwi

Hanoi Nhật Tân Bridge (Vietnam – Japan Friendship Bridge)

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.

Causeway across Kuwait Bay

Posted on 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 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.

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 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.

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 the need for 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.

Bangkok BTS

Posted on by Sir Gwi

Bangkok BTS

The Bangkok Mass Transit System (BTS) is a large urban skytrain system located in Bangkok, the capital of Thailand. The system was inaugurated in 1999.

As of 2017, the system consists of 24 elevated stations and 37 km of elevated rail organized into two main lines crossing each other at Siam central station.

The BTS system is undergoing an extension of its two main lines, with line segments and stations expected to enter into operation in 2019 and 2020.

Foundations

For various packages over the years, Dextra has supplied Sonitec tubes, which are used to test the concrete pile foundations beneath stations and tracks.

In total, Dextra supplied approximately 40,000 linear meters of Sonitec tubes, a distance actually equivalent to the BTS system’s length itself.

Pylons

For pylon vertical bar connections, Dextra offered its Bartec solution.

Bartec allows contractors to conveniently splice prefabricated rebar cages using a simple rebar coupler, allowing savings in steel compared to overlap splicing and accelerating site operations.

In Thailand, the threading operation is supported by Dextra’s factory, conveniently located in the northeast of Bangkok. Contractors receive the rebar already prepared and mounted with their rebar coupler.