Close-up of the 4-lane Deo Ngang tunnel project under construction

Close-up of the tunnel construction connecting Ha Tinh - Quang Binh. Video: Pham Truong.

The project to expand the Deo Ngang tunnel and bridges and access roads on National Highway 1 starts at Ky Nam ward, Ky Anh town (Ha Tinh) and ends at Quang Dong commune, Quang Trach district (Quang Binh).

The projects to upgrade and expand a number of bridges and tunnels on National Highway 1 with a total investment of nearly 2,000 billion VND were approved by the Ministry of Transport (now the Ministry of Construction). The Deo Ngang road tunnel and more than 2km of access road to the tunnel alone have a construction value of more than 340 billion VND.

According to the design, the new tunnel is 555m long, 10.5m wide and has 4 lanes. According to the plan, the new tunnel will be completed in 2025.

When completed, Deo Ngang Tunnel will operate two parallel tunnels with a roadbed width of up to 20.5m, providing four lanes for motor vehicles and two lanes for non-motorized vehicles. The Deo Ngang Tunnel expansion project, when completed, is expected to meet the increasing traffic demand on National Highway 1 through Ha Tinh and Quang Binh provinces.

According to a representative of Song Da 10 Joint Stock Company (the project implementation unit), up to now, the Ha Tinh side tunnel has been handed over the site, the contractor has dug 11m. As for the southern side, due to site clearance problems, the tunnel has not been opened. "The geology of the Hoanh Son mountain range is basically hard rock. This area also has existing tunnel works, a 500kV power line and a temple, so the unit is waiting for the Ha Tinh authorities to approve the blasting plan to drill the tunnel. As for the Quang Binh side tunnel, there are still site clearance problems, so the tunnel cannot be drilled yet," the representative of the construction unit informed.

At this point, the contractor has basically completed digging the tunnel entrance pit. Teams of workers are currently continuing to reinforce the tunnel entrance roof, serving the drilling of the new tunnel tube.

Along with the construction of the new tunnel, the contractor is also constructing bridges and access roads to the tunnel. The service road system, power station, and rest camps for workers have also been completed.

The road and bridge leading to the new Deo Ngang tunnel, over 2.3km long, are under construction.

The tunnel on the Quang Binh side has not been drilled or opened due to site clearance problems.

Deo Ngang Tunnel currently has a main tunnel length of 495m and a system of approaching roads of nearly 2.2km. The main tunnel is 11.5m wide, 7.5m high, has been in operation for 20 years, and has a maximum speed of 50km/h.

Pham Truong

Source: https://tienphong.vn/can-canh-du-an-ham-deo-ngang-4-lan-xe-dang-thi-cong-post1731368.tpo