List of national tunnel first-class qualified enterprises

1. According to the query of Guangming. com. Com, as of June 2023165438+1October 13, China Railway Tunnel Engineering Co., Ltd. has the first-class qualification of China Tunnel.

2. China Communications and Highway Engineering Bureau Group Co., Ltd. ..

3. China Railway 11th Bureau Group Co., Ltd. ..

4. China Communications First Bureau Group Co., Ltd. ..

5. China Railway Construction Engineering Group Co., Ltd ..

6. Institute of Tunnel Engineering, North China University of Water Resources and Hydropower.

7. Tunnel Design Institute of Beijing Traffic Planning and Design Institute.

8. Tunnel Design Institute of China Communications Highway Consulting and Design Institute.