Close-up of Truong Vinh tunnel construction on North-South expressway through Nghe An
(Baonghean.vn) - The North-South Expressway project in the East, Nghi Son - Dien Chau section is currently being urgently constructed. In particular, contractors are concentrating a lot of machinery and human resources to construct Truong Vinh tunnel, the section connecting Nghe An and Thanh Hoa.
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| The project to build the North-South Expressway in the East, the Nghi Son - Dien Chau section, 50km long, passes through Thanh Hoa and Nghe An provinces. This is a project converted from PPP (public-private) investment to public investment. The project has 4 bidding packages, of which package XL011 includes the construction of an important item: Truong Vinh tunnel through Mong Ga mountain in Hoang Mai town. To construct the tunnel, the construction units built a road through the mountain for convenient travel. Photo: Tran Chau |
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| Truong Vinh Tunnel through the mountain between Nghe An and Thanh Hoa started construction on July 2, 2021, with a length of 450m. Photo: Tien Dong |
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| Currently, taking advantage of favorable weather, contractors are concentrating machinery and human resources to construct Truong Vinh tunnel. Photo: Tien Dong |
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| On Nghe An side, currently Truong Vinh tunnel has opened one tunnel door after having a transportation road and clearing the land. Photo: Tien Dong |
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| Truong Vinh Tunnel is being constructed through Mong Ga Mountain in Truong Lam Commune (Tinh Gia, Thanh Hoa) and Quynh Vinh (Hoang Mai Town, Nghe An). According to geological survey results, there are more than 300m of rock, the rest are sedimentary layers mixed with soil and rock. Photo: Tien Dong |
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| To construct the Truong Vinh tunnel, contractors had to open a service road through Mong Ga mountain to transport materials between the two provinces. Photo: Tran Chau |
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| In the photo, the tunnel boring machine is about to be put into operation. Photo: Tien Dong |
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| To ensure construction progress, machinery and equipment are repaired and maintained right on the construction site. The construction unit has gathered about 200 motorbikes and been on standby on site for over 6 months to carry out construction. Photo: Tien Dong |
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| According to information from the construction units, Truong Vinh tunnel was constructed using Austrian NATM technology. This method demonstrates great resistance to geological pressures in areas prone to earthquakes. In fact, this is an excellent construction method chosen to build a large number of tunnels around the world. After blasting, machines are brought in to drill the rock. Photo: Tran Chau |
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| Deo Ca Group Joint Stock Company transports clean air into the tunnel to create fresh air for workers. Photo: Tran Chau |
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| This is the Truong Vinh tunnel entrance on the Nghi Son - Thanh Hoa side, constructed by Deo Ca Group Joint Stock Company. With new technology, Deo Ca Group Joint Stock Company excavated the tunnel using the drilling and blasting method, supported by anchors combined with sprayed concrete. Photo: After penetrating the mountain, the steel bars were placed with iron pads and tightened nuts to reinforce the tunnel shell. The tunnel roof was anchored with rocks to keep the rock and soil blocks in the tunnel from being affected during excavation. Photo: Tran Chau |
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