CHENNAI: A tunnel boring machine named Anaimalai completed tunnelling between Ayanavaram metro and Otteri metro on Thursday and achieved a breakthrough as part of the 116.1km phase-2 project
A release said Anaimalai, which started tunnelling on October 23, 2023, built a 925metre-long tunnel and reached the shaft at Otteri metro.
CMRL managing director M A Siddique and other officials were present during the breakthrough event.
The stretch from Ayanavaram to Otteri is part of the 9km underground section on the 45.4km corridor-3 from Madhavaram Milk Colony to Siruseri Sipcot. A total of seven tunnel boring machines have been mobilised for tunnelling work in the stretch.
Phase-2 has three corridors covering 116.1km. A total of 23 tunnel boring machines will be used for tunnelling work in the project.
