As planned, on May 26, the robot tunneling will officially operate, construction of the 781 m long underground. According to a statement issued by the contractor directly operating underground metro drilling robot, the staff of this unit consists of 17 foreign experts, 5 engineers and 25 Vietnamese workers will operate TBM tunnel drilling machine. From Ba Son Station to Ho Chi Minh City Theater Station. Install underground tunnel drilling robot. As planned, on May 26, this tunnel robot will be officially operated, construction of the 781 m long underground section. This is the item of package 1b of the metro line 1 (Ben Thanh - Suoi Tien) contractor contractor Shimizu - Meada (Japan). Ben Thanh - Suoi Tien will be the first metro line in Vietnam to excavate tunnels underground TBM machine with a tunnel diameter up to 6.79 m. The modern TBM submersible robot from Japan has a total length of 70 m, weighs 300 tons, is being assembled by the unit to exc...