Question

how metro placed on track​

Answer 1

Answer:

With the Metro Rail work picking up pace, officials of Gammon India, who are among the firms selected for setting up underground stations, have swung into action. On Friday evening, they installed ‘Benchmark' plates to ensure proper alignment of rail tracks. These plates will be in place at various points in the vicinity of the track until the completion of the work and will be used as standard reference points. The plates also called as ‘MS' plates are implanted on pillars on the ground level and roof tops

Explanation:

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Answer 2

Explanation:

First two coaches of the train were unloaded on the ramp near Sadar Bazar Metro station today through a carefully planned operation, in which the coaches were lowered near the ramp (the location where the alignment goes underground from elevated) and positioned on the tracks with the help of special high capacity cranes and trailers.

The process needed absolute precision to avoid any physical damage to the coaches or the civil structure. The remaining four coaches of the train will be positioned on the tracks in the next few days after which the process of starting trials on this approximately 13 kilometre long section will begin.

The decision to unload the train was taken to ensure the timely beginning of trial runs on this particular section, where construction work is in finishing stages since the work on the line, connecting to Kalindi Kunj is still in progress. While trial runs are going on between Botanical Garden and Kalkaji Mandir, track, OHE and other associated activities, being carried out between Kalkaji Mandir and Munirka, where the tunnelling work finished last week and as a result, this particular section still does not have any connectivity with the depot.

This step will help in expediting the commissioning of services on this line. Since, the Communication Based Train Control (CBTC) technology is being implemented for the first time, the commissioning time for signalling is likely to take longer and hence, it was decided to take up commissioning work in multiple sections side by side.

In a similar operation, a four coach train was lowered on a ramp near Lajpat Nagar in 2010 to begin the trial runs on the Central Secretariat – Badarpur Violet corridor. However, this particular operation is more challenging as six coaches are being placed this time instead of four (in 2010).