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An up-close look at the repairs being carried out on Rac Bridge, located on National Highway 1A. Video: Pham Truong. |
Rac Bridge spans National Highway 1A, traversing Cam Trung commune in Cam Xuyen district, Ha Tinh province. After 31 years of service, the left-hand side of the bridge, when traveling from North to South, exhibited signs of deterioration.
According to a representative from Road Management Office II.3, under Road Management Division 2 (Vietnam Road Administration – the unit managing the route), the bridge exhibited expansion joint issues, and the concrete on the south wing slab was damaged. Prior to this unexpected repair project, the unit had installed speed limit signs for trucks and coaches and placed wooden boards under the south abutment as a common technical measure used in bridge repair to reduce impact when the wing slab concrete cracks, preventing further damage.
In early May, the project unit diverted traffic to facilitate the repair of the damaged sections. Currently, vehicles traveling on this route are using the new Rac Bridge, located on the right side of the national highway.
On the new Rac Bridge, a soft median divider was installed to separate the two directions of traffic. In addition to warning signs and speed limits of 70 km/h and 50 km/h, the construction unit also placed sandbags to reduce impact, set up traffic cones, and assigned personnel to guide traffic at both ends of the bridge.
Mr. Nguyen Van Thanh, a technical officer at Construction Investment and Consulting JSC 126 (the project executing unit), shared that as per the design, the bridge repair includes replacing the guardrails, scraping off the old asphalt on the bridge deck, resurfacing with C16 concrete, replacing damaged expansion joints, adding transverse beams between spans N1 and N4, re-wrapping the three bridge piers T1, 2, and 3, repairing the damaged beam heads, and repairing the road at both ends of the bridge, extending 30 meters each.
Due to the hot weather, workers have to expedite the construction process on the bridge deck and below. As this is an urgent project, we aim to complete it within three months,” said Mr. Thanh. In the photo, workers endure the heat and sweat to complete the construction.
Mr. Nguyen Manh Ha, the project director, shared that the unexpected repair project for the old Rac Bridge has a total investment of VND 3.3 billion, including VND 2.95 billion for construction. The Road Management Division II (Vietnam Road Administration) is the investor. The project is expected to be completed within three months, so the unit constantly supervises and urges the contractor to finish the repair work as soon as possible.
Under the damaged abutment, workers are adding transverse beams between the bridge spans and repairing the damaged beam heads.
Piers T1, 2, and 3 are being re-wrapped with concrete and reinforced with steel bars inside.
Rac Bridge consists of two bridge units, with the left unit (South-North direction) in use since 1994 and the right unit (North-South direction) constructed in 2013. Located on National Highway 1A, this route experiences high traffic volume.
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