8 months ago
3
After a protracted delay, the passageway boring instrumentality (TBM) ‘Noyyal’ volition yet implicit the passageway betwixt Greenways Road and Mandaveli successful October for Chennai Metro Rail’s signifier II project.
Greenways Road to Mandaveli is simply a tiny underground agelong and a portion of corridor 3 of the signifier II task that runs from Madhavaram to SIPCOT via Mandaveli for 45.8 km.
In September 2023, ‘Noyyal’ began its ngo astatine Greenways Road Metro Rail presumption tract to make a adjacent 750-m passageway till Mandaveli. Behind it, the TBM ‘Vaigai’ excessively followed suit. According to officials of Chennai Metro Rail Limited (CMRL), determination were a fewer reasons for the hold successful completing the duplicate tunnels betwixt Greenways Road and Mandaveli. Initially, CMRL officials estimated that successful six months, the tunnels could beryllium completed.
But 1 of the biggest challenges was shifting of utilities to physique the diaphragm partition of the Mandaveli station.
‘Major challenges’
“We had to displacement 4 monolithic h2o and sewer pipelines to physique the diaphragm wall. For gathering a shaft of the station, we had to divert the utilities and past reconstruct it to the archetypal location. There were 2 large h2o pipelines we had to move, with 1 being 800 mm successful diameter and the different being 1 metre successful diameter. Also, 2 large sewer lines which were of 900 mm diameter and 1.2 m diameter had to beryllium shifted. For the diversion of these pipelines, a pumping good had to beryllium constructed too. It was overmuch much hard than what we had expected and hence took a agelong time,” an authoritative said.
‘Delay by contractor’
Since Mandaveli is simply a junction, the diversion of these utilities was adjacent much challenging. The past portion of the diaphragm partition is being built and volition beryllium finished shortly. “The contractor gathering the presumption excessively delayed the work. But we did enactment pressure, and enactment volition beryllium finished shortly,” different authoritative said.
Due to the hold successful the operation of the Mandaveli station, the TBM has been stationed extracurricular the presumption for a portion now. The breakthrough successful Mandaveli is expected successful astir two-three weeks. By 2028, bid operations from Greenways Road to Thirumayilai via Mandaveli are scheduled to beryllium opened to the public.
