The construction arm of Larsen and Toubro (L&T) has secured 'large' orders from Chennai Metro Rail Corporation Limited for construction of tunnels and stations.

Though the company has not revealed the exact value of the orders, the contracts falls under 'large' category which ranges between Rs 2,500 crore to Rs 5,000 crore.

In a statement on Friday (14 May), L&T said that its Heavy Civil Infrastructure business has secured an order from CMRL to construct nearly 12 km Twin Bored tunnels from Kellys station to Taramani Road Junction station. It also involves construction of diaphragm walls of station box and entry and exit structures of Chetpet Metro, Royapettah Government Hospital, Thiruvanmiyur Metro Stations and part diaphragm wall of Greenways Road Metro Station, including launching and retrieval shafts in these stations.

"This underground Metro Rail tunnel package is a part of Corridor 3 of CMRL Phase-II Metro Rail Project and is to be constructed in approximately 52 months by using eight tunnel boring machines working simultaneously in various stretches of the project," the company said in the statement.

The company has also secured another order from CMRL to construct around 8 Km of elevated viaduct with 9 elevated Metro Stations starting from Power House to Porur Junction including other associated works.

The elevated corridor includes around 4 km of double-deck construction in which both the decks are used for Metro Rail, which will be the first of its kind in India, the company said.

"This elevated Metro Rail package is a part of Corridor 4 of CMRL Phase-II Metro Rail Project and is to be constructed in 36 Months," it added.

These projects are the first packages of Phase– II which have been awarded by Chennai Metro Rail.