Chennai, India (Urban Transport News): Chennai Metro Rail Limied (CMRL) has finalised most of contracts for execution of Phase 2 corridors (Line 3, 4 & 5) of Chennai Metro Rail Project. A total of the 23 Tunnel Boring Machines (TBM) to be used to build tunnels for underground streches of the project.
Out of 23, 12 would be from Tamil Nadu, five from China, one from Germany and one from Pune respectively. The status of four TBMs is not known yet because the contract for the stretch between Kolathur and Nathamuni in the Corridor 5 of Phase 2 project has not been awarded yet. The company that bags the contract for building this underground stretch has to choose the refabricated TBMs and get an approval from CMRL before deploying them for the tunneling work on project.
“Of the 12 machines in Tamil Nadu, 10 will be remanufactured in Chennai and two in Kancheepuram. After the remanufacturing process is complete, the company will have it certified for use from the original manufacturer after which it will be used here,” said an officia, The Hindu reported.
According to detailed project report of Phase II project, a total of 43-km underground network will be built with over 40 stations. However, CMRL is still making some changes in the alignment; so the number of stations is bound to change in the coming months
The 45.81-km long Corridor 3 (Madhavaram to SIPCOT) will be 26.7 km underground and remaining elevated. Corridor 4 which will cover a total distance of 26-km from Light House to Poonamallee will have 10-km underground section. Corridor 5 which will cover a total distance of 47 km linking Madhavaram and Shollinganallur, will have a 5.8 km underground stretch.
While one TBM has arrived from China and reached Madhavaram, the second one has passed the factory acceptance test (FAT) and will be soon taken to the construction site. “These 19 TBMs will be commissioned for the Phase II project one after the other between October and June next year,” said an official, The Hindu reported.