Peoples Daily inform Wanjiali Road rapid transformation of the northern extension line power tunnel 7.6 kilometers. November 21, a small TBM diameter of 4.35 meters brreakthrough. In this longest power tunnel under construction in Hunan Province.

The project is constructors Changsha County Key Construction Project Affairs Center and China Railway Fifth Bureau.

It difficult tunnel condition. Tunnel Boring Machine goed under Metro Line 5, schools, expressways, etc., especially under 100-meter-wide Laodao River. TBM only 9.7 meters away from the Laodao River bed.

Successfull tunnel.

http://hn.people.com.cn/BIG5/n2/2021/1122/c195194-35015613.html