Metro section to go underground soon
Tunnelling of Namma Metro’s North-South underground corridor may begin in June. The first Tunnel Earth Pressure Balance Boring Machine for the North-South UG corridor has arrived at the Chennai Port from Nansha in China. After clearance, the equipment is likely to arrive in Bengaluru in the second week of April. While tunnelling in the UG East-West section, which stretches for 4.8 km, is progressing well, tunnelling work along the North- South UG section will begin shortly.
Tunnelling at the UG East-West section had commenced from the Majestic end towards East and the Tunnel Boring Machine (TBM) 1, Helen and TBM 2, Margarita, have reached Sir M. Visveswaraya Station. Preparation to launch the machines on the East end of the stations is going on. Meanwhile excavation of the launching shaft in Cubbon Road to launch the 3rd TBM is complete.
“In the North- South UG section which stretches for 4 km, the contract for tunnels and two stations with ramps was awarded to TTS-Coastal JV in May 2011. Designs are in progress. Three Earth Pressure Balanced Machines have been ordered; one from Seli, China and two from Herenknecht, China. While two are expected to be operational by June, the third will be operational by October. Works at both South and North Ramps have commenced. At Chickpet, preliminary works of barricading and shifting of uncharted utilities are in progress. At the City Market, secant piling work has started,” said a senior Bangalore Metro Rail Corporation Limited (BMRCL) official.
Underground Majestic Station (interchange station) work in progress: Contract had been awarded to M/s GYT—Coastal (JV) for the construction of this interchange station (3 level station) in December 2011.
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