INSIDE xổ số miền nam TBM TUNNELING ROBOT’S DEEP DIVE AT HANOI METRO LINE 3

As of August 25, xổ số miền nam entire TBM, including xổ số miền nam cutterhead and auxiliary equipment, is now fully underground. xổ số miền nam machine has excavated approximately 100 meters, installed 7 temporary tunnel segments, and assembled 58 permanent tunnel segments.

Up-Close Look at xổ số miền nam TBM Robot Excavating Deep Underground at Hanoi Metro Line 3 (Source: MRB-HGU-FECON)

After nearly a month of TBM operation, xổ số miền nam tunneling process encountered challenges due to xổ số miền nam machine drilling through stiff clay formations, requiring a reduction in speed. However, after adjusting xổ số miền nam soil conditioning agent ratio—a substance sprayed in front of xổ số miền nam TBM cutter head to soften xổ số miền nam geological layer and facilitate excavation—xổ số miền nam TBM’s tunneling speed has returned to normal at approximately 35-40 mm per minute.

As tunneling progresses, FECON simultaneously installs tunnel segments. With its advanced robotic arm, xổ số miền nam segment installation process takes around 30 to 35 minutes for each tunnel ring, which consists of six segments. Excavated spoil generated during tunneling is collected and transported off-site.