Mud spill halts Hanoi metro tunnel boring machine VnExpress Early Tuesday, August 6th, a tunnel boring machine (TBM) caused a mud and water spill in Hanoi's Ba Dinh district.
Tunnel boring machines complete nearly 3,000 meters of Hanoi metro line VnExpress Two tunnel boring machines (TBMs) have excavated almost 3,000 meters of the Nhon-Hanoi Railway metro line in a year, with about 1,000 meters remaining to the final station.
