After five years of work, TBMs fall silent
THE 17 tunnel boring machines (TBM) that have been at work round-the-clock through Mumbai’s underbelly for the last five years fell silent with the tunnelling of the Colaba-Bandra-SEEPZ underground Metro attaining completion. The final breakthrough was achieved by TMB Tansa-1, which broke through at Mumbai Central Station on November 30.
This 42nd breakthrough marked the completion of the tunnelling work of the entire metro line. A breakthrough is defined when a tunnel boring machine (TBM) manages to bore through the defined route and emerges successfully at a designated end. The Mumbai Metro Line 3 is a 33-km-long fully underground line that will snake through subterranean Mumbai to connect Colaba-Bandra-SEEPZ.
