Elevated hall from Teynampet to Saidapet takes form retaining in thoughts the protection of Metro Rails twin tunnels

Above the Metrorail’s underground community between Teynampet and Saidapet, the four-lane elevated hall for over three kilometers is being constructed to make sure the dual tunnels under are secure.

Even the soil across the tunnels will stay undisturbed as much as a sure depth. The high layers of soil, the place quick micro-piles are arising, are being strengthened with geo-textile, officers mentioned.

Steel buildings are used for constructing the flyover to maintain the load over tunnels to a minimal extent. “Piling is just not allowed and remoted footing (a kind of basis laid) for piers is completed within the stretch the place there are tunnels (Teynampet to Nandanam and somewhat past). Pile basis is constructed for piers within the non-tunnel portion (close to Saidapet),” an official mentioned.

A bit of over 30% of the ₹621 crore hall on the arterial Anna Salai, that carries near 2 lakh autos a day, has been accomplished up to now. This is maybe the primary time that an elevated hall is arising above Metrorail tunnels.

According to officers of Chennai Metro Rail Limited (CMRL), they’ve mounted tools (with automated knowledge assortment) within the twin tunnels in addition to stations together with Teynampet, Nandanam and Saidapet to watch any deflection and motion. In case there is a matter, alerts will come to the station management rooms and key personnel.

The stress on the tunnels has been calculated with software program fashions and located to be inside permissible design limits. Also, the designs have been checked by consultants from IIT, officers mentioned. The work is steadily gaining tempo now as staff and equipment has been elevated by 3 times, Highways division officers mentioned.

“Fifty p.c of the foundations have been completed up to now, and we hope to finish all of them earlier than the monsoon in order that the work on the tremendous construction may be taken up even in the course of the rains,” an official of Highways division mentioned.