The Delhi Metro’s underground construction in its third phase of expansion cannot be considered anything short of a revolution. Close to 80 kilometres of underground tunnels have been laid beneath the city in the last five years without causing any disruption to the din and bustle of the daily life above.
The sheer enormity of the task can be gauged from the fact that, the total length of the underground corridors in Delhi Metro’s Phase-3 is more than the total underground sections built by DMRC in both Phases 1 and 2, making it one of the most challenging construction phases for the organization.
Combining the first two phases, Delhi Metro has a total of 31 underground stations, while Phase-3 alone has 35 underground stations. The total length of the underground corridors in the first two phases was 48.06 kilometres and Phase-3 alone has underground corridors of 54 kilometres. The first phase of Delhi Metro’s construction had 13.17 kilometres of underground Metro lines while the second phase had 34.89 kilometres.
The decision to construct more underground corridors was taken to ensure that the construction work caused minimum inconvenience to the people. By constructing so many underground stretches, DMRC has also avoided causing any damage to the existing infrastructure such as flyovers and roads.
For the first time in the history of Delhi Metro’s construction, four different tunneling stretches in Phase-3 have passed below existing underground Metro stretches in the city. These four underground stretches are: