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.

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.

Bangkok BTS

Posted on November 4, 2022March 15, 2024 by Sir Gwi

Bangkok BTS

The Bangkok mass Transit System (BTS) is a large urban skytrain system located across Bangkok, the capital city 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 in two main lines crossing each other in Siam central station.

The BTS system is undergoing an extension of its two main lines with line segments and stations expected to enter in operations 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 below stations and rail.

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

Pylons

For pylon vertical bar connections, Dextra offered its
Bartec connection.
Bartec allows to conveniently splice prefabricated rebar cages by the use of a simple rebar coupler, allowing savings in steel compared to overlap and accelerating site operations.

In Thailand the threading operation is supported from Dextra’s factory, conveniently located in the North East of Bankgok. Contractors receive the rebar already prepared and mounted with their rebar coupler.

Tag: Smooth PT bar systems