Chennai (Metro Rail News):Another day, another victory, TBM Kaveri, commissioned by L&T, achieved a breakthrough at Adyar Junction Station of Line 3 under Package TU-02 of Chennai Metro Phase 2.
TBM Kaveri in Chennai Metro
For its first assignment, TBM Kaveri was deployed to tunnel from Greenways Road to southwards Adyar Junction Station to create a 1228m tunnel .
In February 2023, Larsen & Turbo deployed the TBM Kaveri, their 1st of 8 -tunnel boring machines for the Chennai Metro Phase 2 project to excavate a 1228m tunnel between Greenways Road Station and Adyar junction station.
TBM S-1327A , nicknamed TBM Kaveri, along with 7 other TBM’S is going to construct 12 km of twin tunnels on Line-3 between Kellys station and Taramani Road Junction station of Chennai Metro.
Package TU-O2
This TBM assignment falls under Package TU-O2. In May 2021, L&T grabbed Package TU-02, a Rs. 2385 crore( approx) contract spanning 12 km by CMRL with a 42-month deadline.
Scope of work: The scope of work under this package includes the Construction of approximately 12 km of twin tunnels (totalling 24 km) from Kellys Station to Taramani Road Junction. Along with this, the contractor is also responsible for the construction of diaphragm walls, entry/exit structures of Chetpet station, Royapettah Government Hospital Station, Thiruvanmiyu Station, and part diaphragm wall of Greenways Road Station, including launching and retrieval shafts at the above stations.
As Per the Press Release of Chennai Metro, “Two Earth Pressure Balancing (EPB) TBM’s namely ‘Kaveri’ and ‘Adyar’ are engaged for this work. Kaveri successfully completed the tunnel drive and TBM breakthrough at Adyar shaft. This TBM has passed mixed geological conditions like bottom of the tunnel is rock and top of the tunnel is sand. TBM also tunnelled through full-faced hard rock below some portion of the Adyar River. TBM underwent 65nos cutter head interventions (CHI) to replace cutting tools in the TBM face and consumed 178days for CHI. The TBM also passed below a few Petrol bunks, MGR Janakicollege, Andra Saba Hospital, Durgabai Deshmukh road and Adyar bridge ramp. The 2nd TBM ‘Adyar’ is currently 277m away from the Adyar shaft and expected to reach Adyar shaft by November 2024.”
