While political heavyweights and metro officials were celebrating the lowering of TBM S1073’s parts yesterday in Mumbai, Lucknow Metro’s engineers and their contractor Tata – Gülermak JV silently recommissioned their TBM S52 ‘Gomti’ at Sachivalaya Station’s southern end for building the 22.878 km Line-1’s 613m up-line tunnel towards Hussainganj Station.
This Ø6.52m Terratec earth pressure balance TBM was originally commissioned from the Sachivalaya Station’s northern end in January 2017 and made a breakthrough at Hazratganj Station in June following a 780 meter journey while encountering stiff to hard clayey silt and medium to dense silty sand. The TBM was then disassembled, hoisted out, transported and lowered back to the Sachivalaya Station for its 2nd of 3 drives.
LMRCL officials are confident of S52 reaching Hussainganj by the end of this year. Next month, its sister machine TBM S53 ‘Ganga’ will be recommissioned to build the parallel down-line tunnel on the same stretch.
Meanwhile, here’s a look at the progress made at the Charbagh Ramp from where both TBMs will be retrieved after their final drives –
For more updates, check out the Lucknow section of The Metro Rail Guy!