Agra Metro: TBM ready for launch soon

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AGRA (Metro Rail Metro): The tunnel boring machine, which is being assembled for the construction of underground stations in Ramlila Maidan near the crossover section, is ready for launch as preparations for the launch are in full swing.

Speaking on the same, MD UPMRC Shri Sushil Kumar said, “The TBM machine will operate in an automated mode which is quite interesting, as the machine operates several feet deep into the ground, and there is little room for any error or discrepancies.”

The route is automatically set beforehand by entering the location’s coordinates, and TBM follows that route for tunnel construction.

Movement of the TBM:
While the cutter head moves forward, cutting the debris and initiating the movement, the TBM’s last part, called the ring erector, erects ring segments in a circular motion, making a tunnel.

This entire process is all the more interesting because there is only one window for launching the TBM, i.e. the launch shaft in the beginning and retrieval shaft at the end, and in between, the movement of the TBM has to be ensured with utmost accuracy.

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The TBM launch is anticipated soon, and a team of engineers from UPMRC continuously monitors the entire process.

The TBM usually places 10-14 rings per day, and the length of one ring is 1.4 m, thus, moving a distance of 14-20m per day.

There are seven underground stations for Agra Metro Rail Project, which will use TBM machines for the tunnel construction work.