Chennai Metro
Corridor 4

Project Key Features 

• 9km of 5.8m ID twin drives 

• 6.67m Dia HK EPB - 4 No

• Low cover launch in noncohesive sands - 4m clearance  

MM Tunnelling supported the Client's (CMRL) appointed Engineer - AECOM, as the Chief Tunnel Expert for Corridor 4

Ensured that the contractor carried out the works safely and to the quality required.   Provided alternatives to the contract in respect of cross passages by pushing for escape shaft thereby reducing the number of cross passages required