For infrastructure projects in mountainous regions, geological and topographical surveys are crucial steps that determine the quality and progress of construction. At the Cho Moi – Bac Kan expressway, a nearly 29-kilometer project directed by the Ministry of Construction, A2Z is collaborating with DEOCA Group to undertake survey and design tasks in this complex terrain, establishing a solid foundation for the construction progress.
Surveying under harsh conditions
Commenced in March 2025, the Cho Moi – Bac Kạn expressway has a total investment of over 5,750 billion VND, designed with 4 lanes, a speed limit of 80 km/h, a roadbed width of 22 m, 18 bridges, and several strategic interchanges, with expected completion in 2026. This expressway will be the connection axis from Bac Kan and Thai Nguyen to the economic centers of the Northeast region.
The project traverses complex terrain, passing through multiple areas with weathered rock, underground limestone caves, fractured rock masses, and loose overburden layers. These are all potential risk factors for subsidence, which could cause roadbed instability. In some locations, drilling had to penetrate multiple layers of rock and soil to reach a stable stratum, and even a minor error could force a design adjustment.
A2Z applied deep drilling combined with in-depth geological and topographical analysis, utilizing modern equipment to detect cavities and accurately determine foundation structures. Concurrently, the company conducted hydrological surveys of streams and mountain gullies to assess the risk of flooding and erosion, thereby proposing suitable hydraulic control solutions.
Equipment and personnel: The “wings” of surveying
To ensure smooth survey and design operations, A2Z mobilized a team of highly experienced engineers who have participated in numerous major projects such as Dong Dang – Tra Linh and Tan Phu – Bao Loc. These professionals remain on-site, ready to execute tasks and promptly report any issues that arise. Concurrently, the company is equipped with a modern system of tools for drilling, measurement, and geological-topographical analysis. The combination of experienced personnel and advanced technology enables rapid and accurate data collection, meeting the project’s technical requirements.
At the Cho Moi – Bac Kan expressway project, A2Z continues to leverage its strength in surveying and design under complex topographical conditions, providing accurate data and suitable solutions for project construction.
| The project to construct the Cho Moi – Bac Kan expressway has a total investment of VND 5,750.76 billion, funded by public investment capital. The route’s starting point connects with the Thai Nguyen – Cho Moi expressway in Cho Moi district (Bac Kan) and its endpoint connects with the Bac Kan – Cao Bang expressway in Bac Kan City. The total length of the route is 28.8 km, which includes 28.4 km for the main expressway and a 0.4 km connecting section. The road is being built to a scale of 4 lanes, with a roadbed width of 22 meters and a design speed of 80 km/h. The route features 18 bridges with a total length of 4.66 km. The implementation period is 24 months. |
News: Phuong Chi
