6 months ago
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For the archetypal clip successful the Phase II network, Chennai Metro Rail volition physique an underground web from Panagal Park to Boat Club, via Nandanam, nether the existing Nandanam presumption successful Phase I web without affecting bid operations.
The Nandanam locality successful the metropolis volition person 2 stations, 1 for the Phase I web (falling nether Corridor I from Washermanpet to Chennai Airport via Nandanam) and 1 for the Phase II web (as portion of Corridor 4 from Poonamallee to Light House via Nandanam). The Phase II passageway linking Panagal Park-Nandanam-Boat Club volition beryllium built successful a mode that it volition perpendicularly transverse underneath the Phase I passageway astatine Nandanam.
In the archetypal week of December, Chennai Metro Rail is apt to commence the enactment to physique a passageway from Panagal Park to Boat Club via Nandanam, spanning a region of 1.9 km. Chennai Metro Rail has present received the important support from the Commissioner of Railway Safety, which is mandatory since tunnelling is going to beryllium carried retired nether a functional Nandanam presumption and the existing tunnel.
According to officials of Chennai Metro Rail Limited (CMRL), astatine Nandanam, the extent of the existing passageway is astir 16.5 metres, and the Phase II passageway volition travel up astatine astir 29.84 metres (nearly 98 feet) from the ground. Between the level of the Phase I passageway to the apical of the passageway operation oregon its crown, determination volition beryllium a spread of 6.8 metres.
The archetypal passageway boring instrumentality (TBM) is presently being lowered astatine the Panagal Park presumption readying for the motorboat successful 3 weeks.
“To guarantee the information of the Nandanam presumption and tunnel, we volition continuously show the influential portion utilizing an instrumentality called ‘Robotic Total Stations,’ a surveying precocious precision instrumentality deployed for changeless monitoring of the tunnel, providing real-time information astir the structure, settlements and different deformations. Just arsenic we carried retired tunnelling nether the railway way astatine Kodambakkam railway station, present too, we volition support way to support safety,” an authoritative said.
At Panagal Park, erstwhile the TBM starts its journey, it volition bore astatine a extent of 17.3 metres beneath the ground, but by the clip the instrumentality reaches Nandanam, the extent volition beryllium 29.88 metres.
Sources said that betwixt Panagal Park and Boat Club, the instrumentality is expected to brushwood mostly clayey soil. “But astatine Nandanam station, the instrumentality whitethorn deed immoderate disintegrated clay stone, arsenic present TBMs volition spell to the deeper strata [since determination is operational metro connected Anna Salai],” a root said.
It is inactive not wide if the velocity of the bid volition beryllium decreased erstwhile the TBM bore nether the Nandanam station. Officials said, since the bid volition anyhow participate the presumption astatine a lesser speed, they don’t foresee the request to trim the speed.
