Tunnel through the mountain on Dien Chau - Bai Vot highway

Nghe An Than Vu Tunnel is over one kilometer long, with an investment capital of 1,350 billion VND, part of the Dien Chau - Bai Vot expressway project, and was opened on the afternoon of October 14.

According to Phuc Thanh Hung Investment Joint Stock Company, the two excavations from the north and south of the right tunnel, calculated in the North - South direction, have joined together with absolute precision. The tunnel opening is of great significance, after this point, the coordination of personnel, vehicles, and materials can go through the tunnel without having to travel on the service road, contributing to speeding up the construction progress of Than Vu tunnel as well as the entire expressway project.

Than Vu Tunnel is 1.13 km long, passing through Than Vu Mountain, the north belongs to Dien Phu Commune, Dien Chau District, the south belongs to Nghi Dong Commune, Nghi Loc District. The tunnel is designed to be permanent, with a reinforced concrete shell, with two separate tunnels, each 13.78 m wide, and the distance between the two tunnel centers is 45 m. The right tunnel will serve the first phase of the project, the left tunnel is for the expressway expansion in phase 2.

This is one of the most difficult and complicated projects among the tunnels on the North-South Expressway, due to the weak geology, strongly weathered and fragmented rocks. The project was constructed in 15 months, using Austrian technology.

Route of Dien Chau - Bai Vot expressway. Graphics: Pham Linh

Dien Chau - Bai Vot Expressway is about 50 km long, passing through Nghe An (44.4 km) and Ha Tinh (4.9 km) provinces. Construction started in May 2021 and is expected to be completed in May 2024. To meet transportation needs, phase one of the project has a scale of 4 lanes, a 17 m wide roadbed, and a design speed of 80 km/h.

The project has a total investment capital of over VND 11,150 billion, of which the investor mobilized capital is about VND 5,090 billion and the State capital participated in over VND 6,060 billion. The BOT contract was signed between the Ministry of Transport and the consortium of investors Hoa Hiep Company Limited - CIENCO4 - Nui Hong Investment Company Limited - Truong Son Construction Corporation - VINA2 Construction Investment Company and Phuc Thanh Hung Investment Joint Stock Company (project enterprise).

Duc Hung

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