The Ultimate Overpass: Engineering a Historic Bridge in Central Vietnam

On the recent National Day holidays, the successful tenderers persevered with the construction of the Thuan An sea gate overpass project in Thua Thien - Hue province's Hue city. Despite the break, their dedication to this endeavor remained unwavering.

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The Coastal Highway and Thuan An Sea Gate Bridge project in Thua Thien-Hue province is a significant infrastructure development with a total length of 7.785 km, including a 2.36 km-long bridge. The remaining section consists of access roads connecting National Highways 49A and 49B.

With an investment of VND 2,400 billion, the project is being developed by the Thua Thien-Hue Province Traffic Construction Investment Project Management Authority. It is expected to be completed by March 2025.

Currently, construction is focused on the Thuan An Sea Gate Bridge, which will have a width of 20 meters, while the main bridge span, from pillar 25 to pillar 28, will be 23.5 meters wide.

The main cables on the central pillar have been tensioned.

Despite the scorching weather during the National Day holiday on September 2nd, the contractors continued to work on the project, keeping the construction site bustling with activity.

The project commenced in March 2022, with a joint venture of Tan Nam Construction Joint Stock Company, Dat Phuong Joint Stock Group, and 479 Hoa Binh Joint Stock Company as the contractors, with a contract value of over VND 2,000 billion. So far, approximately VND 1,400 billion, or 68.9%, has been executed.

The contractors are diligently working on the construction of 50 bridge pillars, beam launching, and completing the segmental box girder construction, concrete pouring for the bridge deck, and installation of bridge railings. The form of the largest sea-crossing bridge in Central Vietnam is gradually taking shape.

The central pillar of the Thuan An Sea Gate Bridge.

According to the Thua Thien-Hue Province Traffic Construction Investment Project Management Authority, Tan Nam Construction Joint Stock Company and Dat Phuong Joint Stock Group are responsible for constructing the central pillars from T26 to T28 of the Thuan An Sea Gate Bridge, with a total length of 458 meters, utilizing the Extradosed and cable-stayed methods.

These units are making concerted efforts, with Tan Nam Construction Joint Stock Company having cast 46 meters of the bridge span at pillar T26, and Dat Phuong Joint Stock Group having cast 44 meters and tensioned 6 out of 34 cables. “The bridge span construction method involves direct reinforced concrete pouring, with each pour creating a 4-meter-long segment, and it takes us about 10 days to complete one such segment,” said the investor’s representative.

Mr. Nguyen Van Cuong, Deputy Director of the Thua Thien-Hue Province Traffic Construction Investment Project Management Authority, shared that according to the construction schedule, the Thuan An Sea Gate Bridge is expected to be technically opened to traffic in early 2025. “However, the province recently requested accelerating the construction to achieve technical opening in October 2024, but due to technical factors, this target could not be met. The units are focusing on construction to strive for technical opening by the end of this year,” Mr. Cuong informed.

According to the investor, the scope of site clearance for phase 1 in Hai Duong and Thuan An wards involves a total land area of over 31.7 hectares, including 900 tombs and 120 households requiring resettlement. So far, Hai Duong ward has basically completed site clearance and handed over the area to the construction unit.

In Thuan An ward, 15 households have not yet relocated their tombs due to land search or personal matters. Out of 54 cases approved for compensation to construct the bridge abutments, 32 households have handed over the land, but due to the lack of access roads, only demolition has been carried out without construction initiation.

The two central pillars of the bridge.

The Extradosed and cable-stayed main span.

The largest sea-crossing bridge in Central Vietnam is about to take shape.

Beam launching work on the bridge spans is being urgently completed.

The central pillar of the Thuan An Sea Gate Bridge.

The central pillar is constructed using direct reinforced concrete pouring, with each segment measuring 4 meters in length and taking 10 days to complete.

Construction of the central pillar.

Area under construction by Dat Phuong Joint Stock Group.

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